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Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
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1

Heterogeneous and Brittle Materials  

Science Conference Proceedings (OSTI)

Structural materials are increasingly being required to be stronger and lighter in support of energy conservation and global security. At the same time they are ...

2

Mechanical Reliability Study on Porous Brittle Materials  

Science Conference Proceedings (OSTI)

Presentation Title, Mechanical Reliability Study on Porous Brittle Materials. Author(s), Xiaofeng Fan, Eldon D Case, Fei Ren, Yutian Shu, Melissa J Baumann .

3

Fracture process zone : microstructure and nanomechanics in quasi-brittle materials  

E-Print Network (OSTI)

Cracks begin (and end) at a crack tip; the "Fracture Process Zone" (FPZ) is a region of damage around the crack tip. The context of this research is the FPZ in quasi-brittle materials, which is characterized by cracking ...

Brooks, Zenzile (Zenzile Z.)

2013-01-01T23:59:59.000Z

4

Brittle Failure Design Criteria for Ductile Cast Iron Spent-Fuel  

Office of Scientific and Technical Information (OSTI)

r r Recommendations for Ductile and Brittle Failure Design Criteria for Ductile Cast Iron Spent-Fuel Shipping Containers This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsi- bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Refer- ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-

5

Materials Failure Trends in LWRs  

Science Conference Proceedings (OSTI)

Hardware failures in U.S. nuclear plants cause forced outages, resulting in capacity factor losses of 10-20% and costing utilities hundreds of millions of dollars each year. This analysis of plant operating experience data identifies emerging materials-related failure trends and associated R&D needs.

1987-10-26T23:59:59.000Z

6

Large-Scale Atomistic Simulations of Material Failure  

DOE Data Explorer (OSTI)

These simulations examine the supersonic propagation of cracks and the formation of complex junction structures in metals. Eight simulations concerning brittle fracture, ductile failure, and shockless compression are available.

Abraham, Farid [IBM Almaden Research; Duchaineau, Mark [LLNL; Diaz De La Rubia, Tomas (LLNL); Wirth, Brian [LLNL; Heidelberg,; Seager, Mark [LLNL

7

Medical Device Failure Analysisâ??Specific Materials  

Science Conference Proceedings (OSTI)

...ASM International, 2012, p 343â??359ASM Handbook, Volume 23, Materials for Medical Devices,B.A. James, Medical Device Failure

8

Strength variability in brittle materials with stabilizing and destabilizing resistance fields  

Science Conference Proceedings (OSTI)

Variability in the fracture strength of materials with flaws which experience various stabilizing and destabilizing fields during their extension to failure is examined. Two cases are considered: (a) when the flaws are subjected to a residual surface stress, and (b) when the resistance to crack extension increases with crack length (R or T-curve behavior). In the analysis, the crack size distribution is treated as continuous. By invoking the equilibrium and instability criteria for fracture, and by describing the physical stabilizing and destabilizing fields in terms of the appropriate stress intensity factors, the forms of the strength distributions are obtained. General forms for the crack size distribution are assumed and fundamental statistical descriptors, mean and standard deviation, are used to characterize the strength and variability. The results of the analysis ,ire insensitive to the crack size distribution assumed and indicate that the variability in the cases studied is not necessarily a monotonic function of the microstructural variables. Directions for altering the microstructure of materials in order to obtain optimum strength and variability characteristics are discussed.

Tandon, R.; Green, D.J. (The Pennsylvania State Univ., Univ. Park, PA (United States). Dept. of Materials Science and Engineering); Cook, R.F. (Thomas J. Watson Research Center, Yorktown Heights, NY (United States). IBM Research Division)

1993-02-01T23:59:59.000Z

9

Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.  

DOE Patents (OSTI)

Embodiments include a method for forming a glass which displays visible cracking prior to failure when subjected to predetermined stress level that is greater than a predetermined minimum stress level and less than a failure stress level. The method includes determining a critical flaw size in the glass and introducing a residual stress profile to the glass so that a plurality of visible cracks are formed prior to failure when the glass is subjected to a stress that is greater than the minimum stress level and lower than the critical stress. One method for forming the residual stress profile includes performing a first ion exchange so that a first plurality of ions of a first element in the glass are exchanged with a second plurality of ions of a second element that have a larger volume than the first ions. A second ion exchange is also performed so that a plurality of the second ions in the glass are exchanged back to ions of the first element.

Green, David J. (State College, PA); Sglavo, Vincenzo M. (Roncegno, IT); Tandon, Rajan (Fremont, CA)

2003-02-11T23:59:59.000Z

10

deformation and failure of metals subjected to laser shock loading  

Science Conference Proceedings (OSTI)

The spall stress in laser pulse loading is much higher than in gas-gun loading because of the much ... Dynamic Contact Failure of Two Brittle Particles under Compression ... Natural Fiber Composite in a Novel Multi-Material Ballistic Armor.

11

Failure of railhead material of insulated rail joints.  

E-Print Network (OSTI)

??"Aim of this research is to examine the impact fatigue failure of the railhead of the IRJ [insulated rail joints] and determine actions that can… (more)

Mandal, Nirmal Kumar.

2011-01-01T23:59:59.000Z

12

Failure by fracture and fatigue in "NANO" and "BIO" materials  

E-Print Network (OSTI)

AND FATIGUE IN “NANO” AND “BIO” MATERIALS R. O. Ritchie, 1,3and Fatigue in “Nano” and “Bio” Materials R. O. Ritchie 1 ,structures and biologi- cal/bio-implantable materials, so-

Ritchie, R.O.; Muhlstein, C.L.; Nalla, R.K.

2003-01-01T23:59:59.000Z

13

Failure Analysis of Commercial Silicon Materials for Lithium-ion ...  

Science Conference Proceedings (OSTI)

Symposium, Energy Storage III: Materials, Systems and Applications Symposium ... Electrochemical impedance spectra (EIS) reveal the possible reasons of unsatisfactory ... High Efficiency Materials for Dye-Sensitized Solar Cells.

14

Analysis of the causes of failure in high chrome oxide refractory materials from slagging gasifiers  

SciTech Connect

High Cr2O3 refractory materials are used to line the hot face of slagging gasifiers. Gasifiers are reaction chambers that convert water, oxygen, and a carbon feedstock into CO, H2, and methane at temperatures as high as 1575oC and pressures up to 1000 psi. Ash in the carbon feedstock liquefies, erodes and corrodes the gasifier’s refractory liner, contributing to liner failure within a few months to two years. The failure of a refractory liner decreases a gasifier’s on-line availability and causes costly system downtime and repairs. Many factors contribute to refractory lining failure, including slag penetration and corrosion, thermal cycling, gasifier environment, and mechanical loads. The results of refractory post-mortem failure analysis and how observations relate to gasifier service life will be discussed.

Bennett, J.P.; Kwong, K.-S.; Powell, C.A.; Thomas, H.; Krabbe, R.A.

2006-03-01T23:59:59.000Z

15

An analysis of the causes of failure in high chrome oxide refractory materials from slagging gasifiers  

SciTech Connect

High Cr2O3 refractory materials are used to line the hot face of slagging gasifiers. Gasifiers are reaction chambers that convert water, oxygen, and a carbon feedstock into CO, H2, and methane at temperatures as high as 1575DGC and pressures up to 1000 psi. Ash in the carbon feedstock liquefies, erodes and corrodes the gasifier's refractory liner, contributing to liner failure within a few months to two years. The failure of a refractory liner decreases a gasifier's on-line availability and causes costly system downtime and repairs. Many factors contribute to refractory lining failure, including slag penetration and corrosion, thermal cycling, gasifier environment, and mechanical loads. The results of refractory post-mortem failure analysis and how observations relate to gasifier service life will be discussed.

Bennett, James P.; Kwong, Kyei-Sing; Powell, Cynthia A.; Thomas, Hugh; Krabbe, Rick

2006-01-01T23:59:59.000Z

16

Finite element modeling and experimental study of brittle fracture in tempered martensitic steels for thermonuclear fusion applications.  

E-Print Network (OSTI)

??In this work we have studied brittle fracture in high-chromium reduced activation tempered martensitic steels foreseen as structural materials for thermonuclear fusion reactors. Developing the… (more)

Mueller, Pablo Federico

2009-01-01T23:59:59.000Z

17

Rate-Independent Energy Dissipation Mechanisms in Fiber-Matrix Material Systems  

E-Print Network (OSTI)

1 Rate-independent energy dissipation associated with high-strain high-stress behavior of the material is considered. This rate-independent energy dissipation is associated with damage and relative motion inside the fiber-matrix material system. Simple mechanical models for energy dissipation were presented to facilitate the understanding of the phenomena. Three mechanisms for internal energy dissipation in fibermatrix material systems are considered: fiber fracture and failure; frictional sliding at the fibermatrix interface during fiber pull-out: and matrix deformation. Comparison of dissipation energy capabilities through fiber fracture and failure was examined separately for brittle fibers and for ductile wires. Various commercially available brittle fibers were compared in tables and graphs. For brittle fibers, energy dissipation density values as high as 107 J/cm 3 and 45 J/g were found during fiber failure. The ductile wires studied in this paper included stainless steel, alu...

Victor Giurgiutiu; Kenneth L. Reifsnider; Craig A. Rogers

1996-01-01T23:59:59.000Z

18

Geothermal: Sponsored by OSTI -- Modeling Thermally Induced Failure...  

NLE Websites -- All DOE Office Websites (Extended Search)

GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Sponsored by OSTI -- Modeling Thermally Induced Failure of Brittle Geomaterials Geothermal Technologies Legacy Collection HelpFAQ |...

19

Brittle fracture phenomena: An hypothesis  

SciTech Connect

It is proposed that: volumetric dilation is a fundamental requirement for brittle fracture involving shear; such dilation commonly involves or is expressed as zonal overpressures; the overpressured zones radiate particle motions which are significant to or dominate seismic radiation from blasting; the overpressures are commonly significant to and may dominate the energetics of blastings. Outstanding problems and gaps in our knowledge regarding fragmentation are discussed. It is argued that there is a common missing factor, dilatancy. Supporting evidence is presented from soils and rock mechanics, blasting experimental data and blasting experience. Computer modeling of fragmentation is discussed and the necessity for the inclusion of dilatancy established. Implications are discussed and a test of the hypothesis proposed.

Britton, K.; Walton, O.R.

1987-05-01T23:59:59.000Z

20

In-Vessel Coil Material Failure Rate Estimates for ITER Design Use  

SciTech Connect

The ITER international project design teams are working to produce an engineering design for construction of this large tokamak fusion experiment. One of the design issues is ensuring proper control of the fusion plasma. In-vessel magnet coils may be needed for plasma control, especially the control of edge localized modes (ELMs) and plasma vertical stabilization (VS). These coils will be lifetime components that reside inside the ITER vacuum vessel behind the blanket modules. As such, their reliability is an important design issue since access will be time consuming if any type of repair were necessary. The following chapters give the research results and estimates of failure rates for the coil conductor and jacket materials to be used for the in-vessel coils. Copper and CuCrZr conductors, and stainless steel and Inconel jackets are examined.

L. C. Cadwallader

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Materials Reliability Program: Pressurized Water Reactor Issue Management Table, PWR-IMT Consequence of Failure (MRP-156)  

Science Conference Proceedings (OSTI)

The Industry Initiative on the Management of Materials Issues provides a proactive, safety-focused approach to the management of materials degradation. In support of this initiative, EPRI formed the Materials Degradation Assessment/Issue Management Table Ad-Hoc Committee and developed an Issue Management Table (IMT) for reactor coolant system components. This report provides initial input to the IMT to address the consequences of failure for the identified components in the reactor coolant system for ope...

2005-12-16T23:59:59.000Z

22

BUSH, HERSHEY, AND VOSBURGH: BRITTLE SYSTEMS 1 Brittle System Analysis  

E-Print Network (OSTI)

energy absorption while a ductile fracture is accompanied by much energy absorption. Clearly toughness to a homogeneous material or by rapid cooling of the material after processing. In this work, increasing hardness

Bush, Stephen F.

23

Dynamic Contact Failure of Two Brittle Particles under Compression  

Science Conference Proceedings (OSTI)

This method allow the particle fracturing behavior to be imaged through the specimen thickness without the disturbance from the impact-induced dust. The dust ...

24

Practical simulation of hierarchical brittle fracture  

Science Conference Proceedings (OSTI)

A novel practical method for brittle fracture simulation is presented. Our fracture model is represented by a tree structure, and all elementary fracture pieces are hierarchically connected. Each node in a fracture tree has a glue table to define connections ... Keywords: fluid, fracture, rigid body

Seungtaik Oh; Seunghyup Shin; Hyeryeong Jun

2012-05-01T23:59:59.000Z

25

Failure Analysis of a Cracked Thermite Welded Rail Section  

Science Conference Proceedings (OSTI)

Brittle fracture followed the fatigue crack propagation causing complete separation of the rail. Although the excess material was thought to reinforce the rails it ...

26

Lattice Trapping Barriers to Brittle Fracture N. Bernstein and D.W. Hess*  

E-Print Network (OSTI)

Lattice Trapping Barriers to Brittle Fracture N. Bernstein and D.W. Hess* Center for Computational HPCMPO CHSSI program, and D.W. H. the National Science Foundation. *Current address: Division, 4029 (1998). [18] N. Bernstein and D.W. Hess, in Multiscale Modeling of Materials--2000, edited by L. P

27

Modeling the deformation and failure behavior of FCC and HCP nanocrystalline materials  

E-Print Network (OSTI)

As foreseen by Richard Feynman in his famous talk titled There's Plenty of Room at the Bottom in 1959, scientists nowadays are miniaturizing structures in materials to achieve better performance as concerned in technical ...

Wei, Yujie, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

28

Defects in Photovoltaic Materials and the Origins of Failure to Dope Them: Preprint  

DOE Green Energy (OSTI)

I will review the basic physical principles underlying the formation energy of various intrinsic defects in common photovoltaic materials. I then use the above principles to explain why doping of semiconductors is, in general, limited and which design principles can be used to circumvent such limits. This work can help design strategies of doping absorber materials as well as explain how TCOs work. Recent results on the surprising stability of polar (112)+ surfaces of CIS will also be described in this context.

Zunger, A.; Kilic, C.; Wang, L.

2002-05-01T23:59:59.000Z

29

Brittle superconducting magnets: an equivilent strain model  

Science Conference Proceedings (OSTI)

To exceed fields of 10 T in accelerator magnets, brittle superconductors like A15 Nb{sub 3}Sn and Nb{sub 3}Al or ceramic High Temperature Superconductors have to be used. For such brittle superconductors it is not their maximum tensile yield stress that limits their structural resistance as much as strain values that provoke deformations in their delicate lattice, which in turn affect their superconducting properties. Work on the sensitivity of Nb{sub 3}Sn cables to strain has been conducted in a number of stress states, including uniaxial and multi-axial, producing usually different results. This has made the need of a constituent design criterion imperative for magnet builders. In conventional structural problems an equivalent stress model is typically used to verify mechanical soundness. In the superconducting community a simple scalar equivalent strain to be used in place of an equivalent stress would be an extremely useful tool. As is well known in fundamental mechanics, there is not one single way to reduce a multiaxial strain state as represented by a 2nd order tensor to a scalar. The conceptual experiment proposed here will help determine the best scalar representation to use in the identification of an equivalent strain model.

Barzi, E.; /Fermilab; Danuso, M.

2010-08-01T23:59:59.000Z

30

Numerical Modeling of Hydraulic Fracture Propagation Using Thermo-hydro-mechanical Analysis with Brittle Damage Model by Finite Element Method  

E-Print Network (OSTI)

Better understanding and control of crack growth direction during hydraulic fracturing are essential for enhancing productivity of geothermal and petroleum reservoirs. Structural analysis of fracture propagation and impact on fluid flow is a challenging issue because of the complexity of rock properties and physical aspects of rock failure and fracture growth. Realistic interpretation of the complex interactions between rock deformation, fluid flow, heat transfer, and fracture propagation induced by fluid injection is important for fracture network design. In this work, numerical models are developed to simulate rock failure and hydraulic fracture propagation. The influences of rock deformation, fluid flow, and heat transfer on fracturing processes are studied using a coupled thermo-hydro-mechanical (THM) analysis. The models are used to simulate microscopic and macroscopic fracture behaviors of laboratory-scale uniaxial and triaxial experiments on rock using an elastic/brittle damage model considering a stochastic heterogeneity distribution. The constitutive modeling by the energy release rate-based damage evolution allows characterizing brittle rock failure and strength degradation. This approach is then used to simulate the sequential process of heterogeneous rock failures from the initiation of microcracks to the growth of macrocracks. The hydraulic fracturing path, especially for fractures emanating from inclined wellbores and closed natural fractures, often involves mixed mode fracture propagation. Especially, when the fracture is inclined in a 3D stress field, the propagation cannot be modeled using 2D fracture models. Hence, 2D/3D mixed-modes fracture growth from an initially embedded circular crack is studied using the damage mechanics approach implemented in a finite element method. As a practical problem, hydraulic fracturing stimulation often involves fluid pressure change caused by injected fracturing fluid, fluid leakoff, and fracture propagation with brittle rock behavior and stress heterogeneities. In this dissertation, hydraulic fracture propagation is simulated using a coupled fluid flow/diffusion and rock deformation analysis. Later THM analysis is also carried out. The hydraulic forces in extended fractures are solved using a lubrication equation. Using a new moving-boundary element partition methodology (EPM), fracture propagation through heterogeneous media is predicted simply and efficiently. The method allows coupling fluid flow and rock deformation, and fracture propagation using the lubrication equation to solve for the fluid pressure through newly propagating crack paths. Using the proposed model, the 2D/3D hydraulic fracturing simulations are performed to investigate the role of material and rock heterogeneity. Furthermore, in geothermal and petroleum reservoir design, engineers can take advantage of thermal fracturing that occurs when heat transfers between injected flow and the rock matrix to create reservoir permeability. These thermal stresses are calculated using coupled THM analysis and their influence on crack propagation during reservoir stimulation are investigated using damage mechanics and thermal loading algorithms for newly fractured surfaces.

Min, Kyoung

2013-08-01T23:59:59.000Z

31

Fracture Criterion for Brittle Polycrystalline Materials Based on a ...  

Science Conference Proceedings (OSTI)

... of Macrosegregation with Multiphase Model and Non-orthogonal Grids ... Smart Use of Density Functional Theory Calculations to Drive Newtonian Dynamics.

32

Aerosol Can Failure  

Science Conference Proceedings (OSTI)

Presentation Title, Aerosol Can Failure ... Abstract Scope, A three-piece, welded seam aerosol can of liquid undercoating material failed catastrophically, ...

33

Dissolving brittle stars hint at implications of ocean acidification |  

NLE Websites -- All DOE Office Websites (Extended Search)

Sea urchins and brittle starfish on the seabed at Explorers Cove in Antarctica. The rate the starfish decay offers clues to ocean acidification. Photo courtesy of Shawn Harper. To view a larger version of the image, click on it. Sea urchins and brittle starfish on the seabed at Explorers Cove in Antarctica. The rate the starfish decay offers clues to ocean acidification. Photo courtesy of Shawn Harper. To view a larger version of the image, click on it. Sea urchins and brittle starfish on the seabed at Explorers Cove in Antarctica. The rate the starfish decay offers clues to ocean acidification. Photo courtesy of Shawn Harper. To view a larger version of the image, click on it. Dissolving brittle stars hint at implications of ocean acidification By Chelsea Leu * August 15, 2013 Tweet EmailPrint Under the sea ice of Explorers Cove, Antarctica, is a startling array of life. Brittle stars, sea urchins and scallops grow in profusion on the seafloor, a stark contrast to the icy moonscape on the continent's

34

1 INTRODUCTION Stressing brittle rocks leads to the development of  

E-Print Network (OSTI)

-dependent creep driven by stress corrosion and subcritical crack growth (Lockner, 1998). This creep strongly1 INTRODUCTION Stressing brittle rocks leads to the development of distributed damage long before, 1994, Lyakhovsky et al. 1997; Lockner, 1998). Further, the stress-induced damage may facilitate time

Ze'ev, Reches

35

The Failure of Brass Gas Line Fittings - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Failure Analysis and Prevention. Presentation Title, The Failure of Brass Gas ...

36

Unusual Failures of Aero-Derivative Combustion Turbines  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Failure Analysis and Prevention. Presentation Title, Unusual Failures of ...

37

Failure Analysis of Ruptured CNG Cylinder - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Failure Analysis and Prevention. Presentation Title, Failure Analysis of ...

38

Contributions from Service Experience with Failure Investigations ...  

Science Conference Proceedings (OSTI)

Failure Prevention: Supporting Safe Storage of Plutonium-Bearing Materials through Science, Engineering and Surveillance · Fish Mouth Failure of tThe ...

39

Investigation of Brittle Fracture in 200 Series Austenitic Stainless Steel  

Science Conference Proceedings (OSTI)

Failure Analysis Case Studies from Refinery and Petrochemical Pilot Plants ... Failure of Electrical Submersible Pump of Oil Reservoir · Fan Blade Fracture in a  ...

40

Time-Dependent Failure Mechanisms in Silicon Carbide Composites for Fusion Energy Applications  

SciTech Connect

Silicon carbide has many properties that are attractive for applications in fusion energy systems. The reliability of monolithic silicon carbide is insufficient for its use in large components, due to its brittle failure behavior and flaw sensitivity. Ceramic matrix composites, on the other hand, offer greater flaw tolerance and reliability, but their failure mechanisms are less well understood. This work has focussed on studying potential failure mechanisms in silicon carbide fiber-reinforced, silicon carbide matrix (SiCf/SiCm) composites. In the event of cracks caused by accidental overloads, excessive creep, thermal shock from plasma disruptions, handling during installation, or resulting from processing, subcritical crack growth will occur due to creep of fibers that bridge the crack faces. It is presumed that irradiation will enhance the creep rate of the fibers and, subsequently, the subcritical crack growth rate. At certain temperatures the presence of even small amounts of oxygen leads to oxidation of the interphase material to gaseous products. In this case, subcritical crack growth occurs by a separate mechanism. In addition, fiber shrinkage or weakening due to exposure to radiation can promote additional failure mechanisms, including embrittlement. These mechanisms, the conditions, under which they occur, and the current state of models of the crack growth mechanisms will be discussed.

Lewinsohn, Charles A.; Youngblood, Gerald E.; Henager, Charles H.; Simonen, Edward P.; Jones, Russell H.

2000-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Pipeline Rupture: Review of Common Metallurgical Failure ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Failure Analysis and Prevention. Presentation Title, Pipeline Rupture: Review ...

42

Evaluating Design Elements in Corrosion Failure Investigations  

Science Conference Proceedings (OSTI)

Accident Investigation and Materials Failure Analysis at the Transportation Safety ... Experimental Technique to Conduct Thermal Shock Test on Refractories ...

43

Environmentally Assisted Failures  

Science Conference Proceedings (OSTI)

Investigation of brittle fracture in a cooling water tank specified to be fabricated from ... Residual and applied stresses, as well as the presence of household ...

44

Air-Cooled Stack Freeze Tolerance Freeze Failure Modes and Freeze Tolerance Strategies for GenDriveTM Material Handling Application Systems and Stacks Final Scientific Report  

Science Conference Proceedings (OSTI)

Air-cooled stack technology offers the potential for a simpler system architecture (versus liquid-cooled) for applications below 4 kilowatts. The combined cooling and cathode air allows for a reduction in part count and hence a lower cost solution. However, efficient heat rejection challenges escalate as power and ambient temperature increase. For applications in ambient temperatures below freezing, the air-cooled approach has additional challenges associated with not overcooling the fuel cell stack. The focus of this project was freeze tolerance while maintaining all other stack and system requirements. Through this project, Plug Power advanced the state of the art in technology for air-cooled PEM fuel cell stacks and related GenDrive material handling application fuel cell systems. This was accomplished through a collaborative work plan to improve freeze tolerance and mitigate freeze-thaw effect failure modes within innovative material handling equipment fuel cell systems designed for use in freezer forklift applications. Freeze tolerance remains an area where additional research and understanding can help fuel cells to become commercially viable. This project evaluated both stack level and system level solutions to improve fuel cell stack freeze tolerance. At this time, the most cost effective solutions are at the system level. The freeze mitigation strategies developed over the course of this project could be used to drive fuel cell commercialization. The fuel cell system studied in this project was Plug Power's commercially available GenDrive platform providing battery replacement for equipment in the material handling industry. The fuel cell stacks were Ballard's commercially available FCvelocity 9SSL (9SSL) liquid-cooled PEM fuel cell stack and FCvelocity 1020ACS (Mk1020) air-cooled PEM fuel cell stack.

Hancock, David, W.

2012-02-14T23:59:59.000Z

45

Experimental study of the transition from brittle shear fractures to joints  

E-Print Network (OSTI)

Current geologic thinking is that there are two, and only two, distinct types of brittle fractures, joints and shear fractures (faults). For over half a century, it has been debated that a third type of fracture, referred to as hybrid fractures, could exist and that joints and shear fractures may be end members of a continuous spectrum of brittle fractures. Hybrid fractures are hypothesized to form under mixed compressive and tensile stress states and have structural characteristics intermediate to those of joints and shear fractures. While this hypothesis is accepted in many modern structural geology textbooks used at the college and graduate level, no unchallenged evidence exists for the existence of hybrid fractures. Following the general methodology of a previously performed study by W.F. Brace (1964), but incorporating several key modifications to the experimental methods, a series of dog-bone triaxial experiments were performed on Carrara marble at room temperature, an axial extension rate of 2x10?² mm s?¹, and confining pressures between 7.5 and 170 MPa. The experiments provide strong evidence for the existence of hybrid fractures on the basis of the progressive change in fracture orientation, surface morphology, and failure strength between end-member joints and shear fractures. At the lowest confining pressures (7.5 to 60 MPa), fractures are oriented approximately parallel to the maximum principal stress, []?, form at an axial stress []?, of approximately -7.75 MPa (i.e. the uniaxial tensile strength), and display fracture surfaces characterized by many reflective cleavage faces, consistent with jointing. At the highest confining pressures (130 to 170 MPa), fractures are oriented from 13.4? to 21.6? to []?, form under completely compressive stress states with []? between 0 and 4.3 MPa, and are characterized by powdery white surfaces with short slip lineations, consistent with shear fracturing. At intermediate confining pressures (70 to 120 MPa), fractures are oriented from 3.7? to 12.4? to []?, form under mixed stress conditions with s3 ranging from -10.6 to -3.0 MPa, and display both reflective cleavage faces and powdery white surfaces with short slip lineations, consistent with hybrid fracturing.

Ramsey, Jonathan Michael

2003-01-01T23:59:59.000Z

46

Theory and models of material erosion and lifetime during plasma instabilities in a tokamak environment.  

SciTech Connect

Surface and structural damage to plasma-facing components (PFCs) due to the frequent loss of plasma confinement remains a serious problem for the tokamak reactor concept. The deposited plasma energy causes significant surface erosion, possible structural failure, and frequent plasma contamination. Surface damage consists of vaporization, spallation, and liquid splatter of metallic materials. Structural damage includes large temperature increases in structural materials and at the interfaces between surface coatings and structural members. To evaluate the lifetimes of plasma-facing materials and nearby components and to predict the various forms of damage that they experience, comprehensive models (contained in the HEIGHTS computer simulation package) are developed, integrated self-consistently, and enhanced. Splashing mechanisms such as bubble boiling and various liquid magnetohydrodynamic instabilities and brittle destruction mechanisms of nonmelting materials are being examined. The design requirements and implications of plasma-facing and nearby components are discussed, along with recommendations to mitigate and reduce the effects of plasma instabilities on reactor components.

Hassanein, A.; Konkashbaev, I.

1999-11-08T23:59:59.000Z

47

The nascent Coso metamorphic core complex, east-central California, brittle  

Open Energy Info (EERE)

nascent Coso metamorphic core complex, east-central California, brittle nascent Coso metamorphic core complex, east-central California, brittle upper plate structure revealed by reflection seismic data Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: The nascent Coso metamorphic core complex, east-central California, brittle upper plate structure revealed by reflection seismic data Details Activities (1) Areas (1) Regions (0) Abstract: The relationships between upper crustal faults, the brittle-ductile transition zone, and underlying magmatic features imaged by multifold seismic reflection data are consistent with the hypothesis that the Coso geothermal field, which lies within an extensional step-over between dextral faults, is a young, actively developing metamorphic core complex. The reflection images were processed using a non-linear simulated

48

Failure Analysis of a Reformer Inlet Pigtail  

Science Conference Proceedings (OSTI)

Accident Investigation and Materials Failure Analysis at the Transportation ... 2 HPT Disk/Shaft Initiated by Special Cause Event - Electrical Arcing Damage.

49

Application of fracture toughness scaling models to the ductile-to- brittle transition  

SciTech Connect

An experimental investigation of fracture toughness in the ductile-brittle transition range was conducted. A large number of ASTM A533, Grade B steel, bend and tension specimens with varying crack lengths were tested throughout the transition region. Cleavage fracture toughness scaling models were utilized to correct the data for the loss of constraint in short crack specimens and tension geometries. The toughness scaling models were effective in reducing the scatter in the data, but tended to over-correct the results for the short crack bend specimens. A proposed ASTM Test Practice for Fracture Toughness in the Transition Range, which employs a master curve concept, was applied to the results. The proposed master curve over predicted the fracture toughness in the mid-transition and a modified master curve was developed that more accurately modeled the transition behavior of the material. Finally, the modified master curve and the fracture toughness scaling models were combined to predict the as-measured fracture toughness of the short crack bend and the tension specimens. It was shown that when the scaling models over correct the data for loss of constraint, they can also lead to non-conservative estimates of the increase in toughness for low constraint geometries.

Link, R.E. [Naval Surface Warfare Center, Annapolis, MD (United States); Joyce, J.A. [Naval Academy, Annapolis, MD (United States)

1996-01-01T23:59:59.000Z

50

Materials Analysis - TMS  

Science Conference Proceedings (OSTI)

Mar 17, 2004 ... 2004 TMS Annual Meeting & Exhibition: Materials Analysis: Understanding ... with the leading failure scenario based on visual observations.

51

Fractography of Powder Metal Materials  

Science Conference Proceedings (OSTI)

Failure Prevention: Supporting Safe Storage of Plutonium-Bearing Materials through Science, Engineering and Surveillance · Fish Mouth Failure of tThe ...

52

Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Materials and methods are available as supplementary materials on Science Online. 16. W. Benz, A. G. W. Cameron, H. J. Melosh, Icarus 81, 113 (1989). 17. S. L. Thompson, H. S. Lauson, Technical Rep. SC-RR-710714, Sandia Nat. Labs (1972). 18. H. J. Melosh, Meteorit. Planet. Sci. 42, 2079 (2007). 19. S. Ida, R. M. Canup, G. R. Stewart, Nature 389, 353 (1997). 20. E. Kokubo, J. Makino, S. Ida, Icarus 148, 419 (2000). 21. M. M. M. Meier, A. Reufer, W. Benz, R. Wieler, Annual Meeting of the Meteoritical Society LXXIV, abstr. 5039 (2011). 22. C. B. Agnor, R. M. Canup, H. F. Levison, Icarus 142, 219 (1999). 23. D. P. O'Brien, A. Morbidelli, H. F. Levison, Icarus 184, 39 (2006). 24. R. M. Canup, Science 307, 546 (2005). 25. J. J. Salmon, R. M. Canup, Lunar Planet. Sci. XLIII, 2540 (2012). Acknowledgments: SPH simulation data are contained in tables S2 to S5 of the supplementary materials. Financial support

53

Why Conduct Disaster and Failure Studies. Buildings, bridges ...  

Science Conference Proceedings (OSTI)

... in materials, and manmade disasters, including terrorist ... The study of disaster and failure events is ... evacuation and emergency response procedures ...

2012-11-14T23:59:59.000Z

54

An Examination of Failure Modes and Investigation Techniques in ...  

Science Conference Proceedings (OSTI)

Accident Investigation and Materials Failure Analysis at the Transportation Safety ... Experimental Technique to Conduct Thermal Shock Test on Refractories ...

55

Review of Fuel Oil System Failures in Ontario  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Failure Analysis and Prevention. Presentation Title, Review of Fuel Oil System ...

56

Overcoming the Brittleness of Glass through Bio-inspiration and ...  

Science Conference Proceedings (OSTI)

The micro-cracks, positioned along specific surfaces within the material, coalesce ... Catalysts by Using the Metal Ion-reducing Bacterium Shewanella Algae.

57

Phase Field Simulations of Brittle Fracture in Composites with ...  

Science Conference Proceedings (OSTI)

A phase field model is used to study crack propagation in such materials. ... A Comparison of Coulombic and Plastic Shear Faults in Ice · A General Approach to ...

58

Material  

DOE Green Energy (OSTI)

Li(Ni{sub 0.4}Co{sub 0.15}Al{sub 0.05}Mn{sub 0.4})O{sub 2} was investigated to understand the effect of replacement of the cobalt by aluminum on the structural and electrochemical properties. In situ X-ray absorption spectroscopy (XAS) was performed, utilizing a novel in situ electrochemical cell, specifically designed for long-term X-ray experiments. The cell was cycled at a moderate rate through a typical Li-ion battery operating voltage range. (1.0-4.7 V) XAS measurements were performed at different states of charge (SOC) during cycling, at the Ni, Co, and the Mn edges, revealing details about the response of the cathode to Li insertion and extraction processes. The extended X-ray absorption fine structure (EXAFS) region of the spectra revealed the changes of bond distance and coordination number of Ni, Co, and Mn absorbers as a function of the SOC of the material. The oxidation states of the transition metals in the system are Ni{sup 2+}, Co{sup 3+}, and Mn{sup 4+} in the as-made material (fully discharged), while during charging the Ni{sup 2+} is oxidized to Ni{sup 4+} through an intermediate stage of Ni{sup 3+}, Co{sup 3+} is oxidized toward Co{sup 4+}, and Mn was found to be electrochemically inactive and remained as Mn{sup 4+}. The EXAFS results during cycling show that the Ni-O changes the most, followed by Co-O, and Mn-O varies the least. These measurements on this cathode material confirmed that the material retains its symmetry and good structural short-range order leading to the superior cycling reported earlier.

Rumble, C.; Conry, T.E.; Doeff, Marca; Cairns, Elton J.; Penner-Hahn, James E.; Deb, Aniruddha

2010-06-14T23:59:59.000Z

59

HYDROGEN EMBRITTLEMENT OF METALS: A PRIMER FOR THE FAILURE ANALYST  

DOE Green Energy (OSTI)

Hydrogen reduces the service life of many metallic components. Such reductions may be manifested as blisters, as a decrease in fatigue resistance, as enhanced creep, as the precipitation of a hydride phase and, most commonly, as unexpected, macroscopically brittle failure. This unexpected, brittle fracture is commonly termed hydrogen embrittlement. Frequently, hydrogen embrittlement occurs after the component has been is service for a period of time and much of the resulting fracture surface is distinctly intergranular. Many failures, particularly of high strength steels, are attributed to hydrogen embrittlement simply because the failure analyst sees intergranular fracture in a component that served adequately for a significant period of time. Unfortunately, simply determining that a failure is due to hydrogen embrittlement or some other form of hydrogen induced damage is of no particular help to the customer unless that determination is coupled with recommendations that provide pathways to avoid such damage in future applications. This paper presents qualitative and phenomenological descriptions of the hydrogen damage processes and outlines several metallurgical recommendations that may help reduce the susceptibility of a particular component or system to the various forms of hydrogen damage.

Louthan, M

2008-01-31T23:59:59.000Z

60

Materials and mechanics of rate effects in brittle fracture. Progress report, October 1979-October 1980  

SciTech Connect

Energy balance methods have been used to find the crack driving force in elastic fractures. The fracture toughness of cracked steel bars have been measured using these techniques. Crack tip dislocations have been shown to protect the crack tip by having a stress intensity value that is opposite in sign from the applied stress intensity value. Thus, crack tip dislocation plasticity shields the crack from the external stress intensity factor. In the fatigue of LiF single crystals a relationship between monotonic and fatigue hardening responses has been established using a statistical model for fatigue deformation.

Burns, S.J.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Carbon deposition during brittle rock deformation: Changes in electrical properties of fault zones and potential geoelectric phenomena during earthquakes  

Science Conference Proceedings (OSTI)

To investigate potential mechanisms for geoelectric phenomena accompanying earthquakes, we have deformed hollow cylinders of Sioux quartzite to failure in the presence of carbonaceous pore fluids and investigated the resulting changes in electrical conductivity and carbon distribution. Samples were loaded at room temperature or 400 C by a hydrostatic pressure at their outer diameter, increasing pressure at a constant rate to {approx}290 MPa. Pore fluids consisted of pure CO, CO{sub 2}, CH{sub 4} and a 1:1 mixture of CO{sub 2} and CH{sub 4}, each with pore pressures of 2.0 to 4.1 MPa. Failure occurred by the formation of mode II shear fractures transecting the hollow cylinder walls. Radial resistivities of the cylinders fell to 2.9 to 3.1 M{Omega}-m for CO tests and 15.2 to 16.5 M{Omega}-m for CO{sub 2}:CH{sub 4} tests, compared with >23 M{Omega}-m for dry, undeformed cylinders. Carbonaceous fluids had no discernable influence on rock strength. Based on mapping using electron microprobe techniques, carbon occurs preferentially as quasi-continuous films on newly-formed fracture surfaces, but these films are absent from pre-existing surfaces in those same experiments. The observations support the hypothesis that electrical conductivity of rocks is enhanced by the deposition of carbon on fracture surfaces and imply that electrical properties may change in direct response to brittle deformation. They also suggest that the carbon films formed nearly instantaneously as the cracks formed. Carbon film deposition may accompany the development of microfracture arrays prior to and during fault rupture and thus may be capable of explaining precursory and coseismic geoelectric phenomena.

Mathez, E A; Roberts, J J; Duba, A G; Kronenberg, A K; Karner, S L

2008-05-16T23:59:59.000Z

62

Failure of a Fan Hub Blade Made of an A713 Al-Zn Alloy  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Failure Analysis and Prevention. Presentation Title, Failure of a Fan Hub Blade ...

63

Failure Analysis at the NTSB and TSB Canada - Programmaster.org  

Science Conference Proceedings (OSTI)

Failure Analysis and Prevention: Failure Analysis at the NTSB and TSB Canada Program Organizers: Dustin Turnquist, ESI; Larry Hanke, Materials Evaluation ...

64

An Integrated Approach to Modeling and Mitigating SOFC Failure  

DOE Green Energy (OSTI)

The objective of this project is to develop first-order failure criteria to be used for the initial design, material selection and optimization against thermomechanical failure of the PEN structure in high temperature SOFCs.

Fedorov, A.; Haynes, C.; Qu, J.

2005-01-27T23:59:59.000Z

65

Failure Stress and Apparent Elastic Modulus of Diesel Particulate Filter Ceramics  

SciTech Connect

Three established mechanical test specimen geometries and test methods used to evaluate mechanical properties of brittle materials are adapted to the diesel particulate filter (DPF) architecture to evaluate failure initiation stress and apparent elastic modulus of the ceramics comprising DPFs. The three custom-designed test coupons are harvested out of DPFs to promote a particular combination of orientation of crack initiation and crack plane. The testing of the DPF biaxial flexure disk produces a radial tensile stress and a crack plane parallel with the DPF's longitudinal axis. The testing of the DPF sectored flexural specimen produces axial tension at the DPF's OD and a crack plane perpendicular to the DPF's longitudinal axis. The testing of the DPF o-ring specimen produces hoop tension at the DPF's original outer diameter (OD) and at the inner diameter of the test coupon, and a crack plane parallel to the DPF's longitudinal axis. The testing of these mechanical test coupons also enables the determination of an apparent elastic modulus of the DPF ceramic material. Results consistently show that the apparent elastic modulus of the DPF ceramics is much less (e.g., up to an order of magnitude less) than apparent elastic modulus estimated using sonic- or resonance-based test methods. These specimen geometries, produced stress states, and modes of consequential crack initiation are discussed in context to the DPF's symmetry along with the assessments of each specimen's ease of fabrication, testing, failure stress determination, ultimate viability, and prospects for test standardization. Lastly, an explanation is offered for why the apparent elastic modulus measured with these three mechanical test coupons is relatively low and why their low values are more accurate for predicting thermomechanical stresses in DPFs.

Wereszczak, Andrew A [ORNL; Fox, Ethan E [ORNL; Lance, Michael J [ORNL; Ferber, Mattison K [ORNL

2012-01-01T23:59:59.000Z

66

Brittle fracture in Nd{sub 2}Fe{sub 14}B intermetallic magnets  

Science Conference Proceedings (OSTI)

Efforts to understand and improve the fracture toughness of Nd{sub 2}Fe{sub 14}B permanent magnets require an understanding of the fracture process itself. Cleavage plane orientations in Nd{sub 2}Fe{sub 14}B were identified by X-ray diffraction and found to be rather random. Cleavage fracture surfaces often exhibited smooth curvatures with no evidence for cleavage steps. The small grain sizes of less than 100 nm in Magnequench MQ material preclude an easy assessment of the fracture mode by scanning electron microscopy. Auger electron spectroscopy showed that much of the surface is covered with a 1 nm thick layer of a neodymium-rich phase presumably the 70Nd-30Fe eutectic phase suggesting that the hard Nd{sub 2}Fe{sub 14}B grains do not cleave but instead failure is at or in the grain boundary phase.

Horton, J.A.; Heatherly, L.; Specht, E.D. [Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.; Li, D.; Herchenroeder, J.W. [Magnequench International, Inc., Anderson, IN (United States); Canfield, P.C. [Ames Lab., IA (United States)]|[Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

1998-02-01T23:59:59.000Z

67

Asynchronous Failure Detectors  

E-Print Network (OSTI)

Failure detectors -- oracles that provide information about process crashes -- are an important abstraction for crash tolerance in distributed systems. The generality of failure-detector theory, while providing great ...

Cornejo, Alejandro

2013-10-10T23:59:59.000Z

68

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure  

Science Conference Proceedings (OSTI)

... with Failure Investigations and Age Related Degradation Mechanisms in the Materials and Manufacturing Selection for the New AP1000 Nuclear Power Plant

69

Failure Analysis and Prevention  

Science Conference Proceedings (OSTI)

Embrittlement of Forging Brass Components Due to Microstructural Defects · Environmental Stress Cracking Failures in Plastics: Case Studies and Fractography.

70

Single crystal silicon as a macro-world structural material : application to compact, lightweight high pressure vessels  

E-Print Network (OSTI)

Single crystal silicon has promising inherent structural properties which are attractive for weight sensitive applications. Single crystal silicon, however, is a brittle material which makes the usable strength that can ...

Garza, Tanya Cruz

2011-01-01T23:59:59.000Z

71

Powder Metallurgy Bearing Failure  

Science Conference Proceedings (OSTI)

The bearings were oil impregnated, porous, powder metallurgy bushings. Even after the fire, lubricant ... Failure Analysis of Four Graphite Pump Seal Faces.

72

Failure Analysis and Prevention  

Science Conference Proceedings (OSTI)

The following topics are of special interest: fatigue & fracture, tools & techniques for failure analysis, aerospace, aging Infrastructure/bridges, oil and gas, surface ...

73

Failure Analysis and Prevention  

Science Conference Proceedings (OSTI)

... a Failure Mechanism in the Absence of Physical Evidence · “High-Temperature Stress Relaxation Cracking and Stress Rupture Observed in a Coke Gasifier” ...

74

Low Cycle Fatigue of NiAl Deformed Near the Brittle-to-Ductile ...  

Science Conference Proceedings (OSTI)

percentage of intergranular failure decreased in the fracture morphology of both the monotonic and ... and the percentage of transgranular fracture increases [6].

75

SYNTHETIC SLING FAILURE - EVALUATIONS & RECOMMENDATIONS  

SciTech Connect

The information and evaluations provided in this report were compiled to address the recurring problem of synthetic sling failure. As safety is the number one priority in all work aspects, a solution must be devised to prevent accidents from occurring. A total of thirteen cases regarding synthetic sling failure were evaluated in order to determine their causes, effects, and preventative measures. From the collected data, it was found that all cases in which the synthetic sling contacted the edge of its load resulted in sling failure. It is required that adequate synthetic sling protection devices be used to protect slings in any lift where the sling comes in direct contact with the edge or corner of its load. However, there are no consensus codes or standards stating the type, material, or purpose of the type of protective device used to protect the sling from being cut. Numerous industry standards and codes provide vague descriptions on how to protect synthetic slings. Without a clear, concise statement of how to protect synthetic slings, it is common for inadequate materials and sling protection devices to be used in an attempt to meet the intent of these requirements. The use of an inadequate sling protection device is the main cause of synthetic sling failure in all researched cases. Commercial sling protection devices come in many shapes and sizes, and have a variety of names, as well as advertised uses. 'Abrasion pads' and 'wear protectors' are two different names for products with the same intended purpose. There is no distinguishable way to determine the extent of sling protection which these devices will provide, or what specific scenarios they are made for. This creates room for error in a field where error is unacceptable. This report provides a recommended action for hoisting and rigging activities which require synthetic slings to contact a load, as well as recommended changes to industry standards which will benefit overall industry safety.

MACKEY TC; HENDERSON CS

2009-10-26T23:59:59.000Z

76

Brittle creep in basalt and its application to time-dependent volcano deformation M.J. Heap a,b,  

E-Print Network (OSTI)

interpreted as due to a reduction in stress corrosion reactions; the result of a reduction in crack aperture-dependent, subcritical crack growth, of which stress corrosion is the most important mechanism in the Earth's brittle). Stress corrosion is a process by which strained atomic bonds at crack tips react preferentially

77

Gear Tooth Failure Modes  

Science Conference Proceedings (OSTI)

Table 1   Basic failure modes of gear teeth...Rolling Bruising Peening Brinelling Rippling (fish scaling) Ridging Bending (yielding) Tip-to-root interference Bending fatigue Low-cycle

78

Analysis and prevention of metallurgical failures at a major direct coal liquefaction pilot plant  

Science Conference Proceedings (OSTI)

The H-Coal Pilot Plant in Catlettsburg, KY was the largest-capacity direct coal liquefaction project operating in the United States. Since the start of operations, performance of its components was carefully monitored and occasional failures were examined and documented. The results of the examinations were used to develop remedial steps and improve the design of scale-up units. In this paper, the metallurgical aspects of the following incidents will be described: 1) stress corrosion cracking of martensitic stainless steel bolting on the waterside of a heat exchanger; 2) stress corrosion cracking of a superalloy seal ring; 3) brittle failure of a low alloy nut in a block valve body; 4) corrosion damage in the fractionator and side stripper; 5) erosion/corrosion of a coal liquid transfer line in the atmospheric fractionation area; 6) pitting corrosion in a deaerator carbon steel inlet pipe; 7) brittle failure of a martensitic stainless steel ball in a block valve handling coal liquids; and 8) cracking of cobalt-base alloy seat rings in block valve applications. In addition, remedial steps and preventive measures leading to successful performance after repair are briefly described.

Sagues, A.A.; Ganesan, P.; Ragle, H.V.; Searles, R.C.; Sethi, V.K.

1984-09-01T23:59:59.000Z

79

Boiler Stack Economizer Tube Failure  

Science Conference Proceedings (OSTI)

Presentation Title, Boiler Stack Economizer Tube Failure ... performed to investigate the failure of a type 304 stainless steel tube from a boiler stack economizer.

80

DOE fundamentals handbook: Material science. Volume 2  

Science Conference Proceedings (OSTI)

This handbook was developed to assist nuclear facility operating contractors in providing operators, maintenance personnel, and the technical staff with the necessary fundamentals training to ensure a basic understanding of the structure and properties of metals. This volume contains the following modules: thermal shock (thermal stress, pressurized thermal shock), brittle fracture (mechanism, minimum pressurization-temperature curves, heatup/cooldown rate limits), and plant materials (properties considered when selecting materials, fuel materials, cladding and reflectors, control materials, nuclear reactor core problems, plant material problems, atomic displacement due to irradiation, thermal and displacement spikes due to irradiation, neutron capture effect, radiation effects in organic compounds, reactor use of aluminum).

Not Available

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

On the toughening of brittle materials by grain bridging: promoting intergranular fracture through grain angle, strength, and toughness  

E-Print Network (OSTI)

is grateful for the support of Sandia National Laboratories,operated by Sandia Corporation, a Lockheed Martin Company,Klein c , R.O. Ritchie d,e, ? a Sandia b Department National

Foulk III, J.W.; Johnson, G.C.; Klein, P.A.; Ritchie, R.O.

2008-01-01T23:59:59.000Z

82

Weld failure detection  

DOE Patents (OSTI)

Method and apparatus for detecting failure in a welded connection, particrly applicable to not readily accessible welds such as those joining components within the reactor vessel of a nuclear reactor system. A preselected tag gas is sealed within a chamber which extends through selected portions of the base metal and weld deposit. In the event of a failure, such as development of a crack extending from the chamber to an outer surface, the tag gas is released. The environment about the welded area is directed to an analyzer which, in the event of presence of the tag gas, evidences the failure. A trigger gas can be included with the tag gas to actuate the analyzer.

Pennell, William E. (Unity Township, Westmoreland County, PA); Sutton, Jr., Harry G. (Mt. Lebanon, PA)

1981-01-01T23:59:59.000Z

83

Causes of Pipeline Failures  

Science Conference Proceedings (OSTI)

Table 1   Types of defects that can cause pipeline failures...pipe body Mechanical damage Environmental causes Corrosion (external or internal) Hydrogen-stress cracking External stress corrosion cracking Internal sulfide-stress cracking Hydrogen blistering Fatigue Miscellaneous causes Secondary loads Weldments to pipe surface Wrinkle bends Internal combustion...

84

A Boatig Accident Caused by the Brittle Fracture of a Zinc Alloy Die ...  

Science Conference Proceedings (OSTI)

The boat ran into the bank of the river at about 40 m.p.h. and both occupants were badly ... A Metallography-Based Examination of Inadvertent Diffusion Bonding During Heat Treatment ... Electrical Fluting Failure of a Tri-Lobe Roller Bearing.

85

Apparatus and method for prevention of cracking in welded brittle alloys  

DOE Patents (OSTI)

An apparatus and method for reducing cracking in a heated material as the material cools. The apparatus includes a variable frequency electric signal generator that is coupled to a transducer. The transducer produces a variable frequency acoustic signal in response to the variable frequency electric signal, which is applied to the heated material to reduce cracking as the material cools.

Kronberg, James W. (Aiken, SC); Younkins, Robert M. (New Ellenton, SC)

2000-01-01T23:59:59.000Z

86

Rate dependent response and failure of a ductile epoxy and carbon fiber reinforced epoxy composite  

Science Conference Proceedings (OSTI)

An extensive characterization suite has been performed on the response and failure of a ductile epoxy 55A and uniaxial carbon fiber reinforced epoxy composite of IM7 fibers in 55A resin from the quasistatic to shock regime. The quasistatic and intermediate strain rate response, including elastic modulus, yield and failure have are characterized by quasistatic, SHPB, and DMA measurements as a function of fiber orientation and temperature. The high strain rate shock effect of fiber orientation in the composite and response of the pure resin are presented for plate impact experiments. It has previously been shown that at lower impact velocities the shock velocity is strongly dependent on fiber orientation but at higher impact velocity the in-plane and through thickness Hugoniots converge. The current results are compared with previous studies of the shock response of carbon fiber composites with more conventional brittle epoxy matrices. The spall response of the composite is measured and compared with quasistatic fracture toughness measurements.

Brown, Eric N [Los Alamos National Laboratory; Rae, Philip J [Los Alamos National Laboratory; Dattelbaum, Dana M [Los Alamos National Laboratory; Stahl, David B [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

87

Ice Ball Impact Testing of Roofing Materials - Programmaster.org  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Failure Analysis and Prevention. Presentation Title, Ice Ball Impact Testing of ...

88

Tools & Techniques for Failure Analysis  

Science Conference Proceedings (OSTI)

Oct 31, 2013 ... Failure Analysis and Prevention: Tools & Techniques for Failure ... As lithium-ion battery technology continues to advance and is adopted in diverse markets, ... fracture origin and an understanding of the fracture event energy.

89

Fatigue Failure in Tungsten Carbide  

Science Conference Proceedings (OSTI)

Mercury porosimetry can be applied to determine the percent interconnected porosity. ... Failure Analysis of Duplex Stainless Steel Wet Flue Gas Desulfurization ... The Role of Corrosion and Oxidation in High Temperature Failures: Valuable ...

90

Failure of a Centrifugal Caster  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

91

VENTILATION (HVAC) FAILURE (BUILDING WIDE)  

E-Print Network (OSTI)

VENTILATION (HVAC) FAILURE (BUILDING WIDE) A failure or shutdown of the ventilation system will be signaled by cessation of the audible background "rumbling" sound of the building's HVAC system. As building durations. NOTE: Due to unpredictable pressure differentials in and around the labs during an HVAC failure

Strynadka, Natalie

92

Direct atomistic simulation of brittle-to-ductile transition in silicon single crystals  

E-Print Network (OSTI)

Silicon is an important material not only for semiconductor applications, but also for the development of novel bioinspired and biomimicking materials and structures or drug delivery systems in the context of nanomedicine. ...

Sen, Dipanjan

93

Hybrid sol-gel optical materials  

DOE Patents (OSTI)

Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. The linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling.

Zeigler, John M. (Albuquerque, NM)

1993-01-01T23:59:59.000Z

94

Hybrid sol-gel optical materials  

DOE Patents (OSTI)

Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. the linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling. 3 figs.

Zeigler, J.M.

1990-02-13T23:59:59.000Z

95

Hybrid sol-gel optical materials  

DOE Patents (OSTI)

Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. The linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling.

Zeigler, J.M.

1993-04-20T23:59:59.000Z

96

Hybrid sol-gel optical materials  

DOE Patents (OSTI)

Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. The linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling.

Zeigler, John M. (Albuquerque, NM)

1992-01-01T23:59:59.000Z

97

Combination stem cell therapy for heart failure  

E-Print Network (OSTI)

to further analyze his heart failure. Com- plete bloodA: Inflammatory markers in stable heart failure and theirof improvement and readmission in heart failure. Eur J Heart

2010-01-01T23:59:59.000Z

98

“Playboy Bunny” Sign of Congestive Heart Failure  

E-Print Network (OSTI)

Bunny’’ Sign of Congestive Heart Failure Akira Hokama, MD*to evaluate congestive heart failure. We highlight ‘‘Playboycaused by congestive heart failure. [West J Emerg Med. 2011;

Hokama, Akira; Arakaki, Shingo; Shibata, Daisuke; Maeshiro, Tatsuji; Kinjo, Fukunori; Fujita, Jiro

2011-01-01T23:59:59.000Z

99

Steam generator tube failures  

SciTech Connect

A review and summary of the available information on steam generator tubing failures and the impact of these failures on plant safety is presented. The following topics are covered: pressurized water reactor (PWR), Canadian deuterium uranium (CANDU) reactor, and Russian water moderated, water cooled energy reactor (VVER) steam generator degradation, PWR steam generator tube ruptures, the thermal-hydraulic response of a PWR plant with a faulted steam generator, the risk significance of steam generator tube rupture accidents, tubing inspection requirements and fitness-for-service criteria in various countries, and defect detection reliability and sizing accuracy. A significant number of steam generator tubes are defective and are removed from service or repaired each year. This wide spread damage has been caused by many diverse degradation mechanisms, some of which are difficult to detect and predict. In addition, spontaneous tube ruptures have occurred at the rate of about one every 2 years over the last 20 years, and incipient tube ruptures (tube failures usually identified with leak detection monitors just before rupture) have been occurring at the rate of about one per year. These ruptures have caused complex plant transients which have not always been easy for the reactor operators to control. Our analysis shows that if more than 15 tubes rupture during a main steam line break, the system response could lead to core melting. Although spontaneous and induced steam generator tube ruptures are small contributors to the total core damage frequency calculated in probabilistic risk assessments, they are risk significant because the radionuclides are likely to bypass the reactor containment building. The frequency of steam generator tube ruptures can be significantly reduced through appropriate and timely inspections and repairs or removal from service.

MacDonald, P.E.; Shah, V.N.; Ward, L.W.; Ellison, P.G.

1996-04-01T23:59:59.000Z

100

Failure Analysis and Prevention  

Science Conference Proceedings (OSTI)

..., ASM International, 2012, p 281â??289ASM Handbook. Vol 23, Materials for Medical DevicesJ. Hoffman, T. Xu, and S. Donthu,

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Modeling brittle fracture, slip weakening, and variable friction in geomaterials with an embedded strong discontinuity finite element.  

DOE Green Energy (OSTI)

Localized shear deformation plays an important role in a number of geotechnical and geological processes. Slope failures, the formation and propagation of faults, cracking in concrete dams, and shear fractures in subsiding hydrocarbon reservoirs are examples of important effects of shear localization. Traditional engineering analyses of these phenomena, such as limit equilibrium techniques, make certain assumptions on the shape of the failure surface as well as other simplifications. While these methods may be adequate for the applications for which they were designed, it is difficult to extrapolate the results to more general scenarios. An alternative approach is to use a numerical modeling technique, such as the finite element method, to predict localization. While standard finite elements can model a wide variety of loading situations and geometries quite well, for numerical reasons they have difficulty capturing the softening and anisotropic damage that accompanies localization. By introducing an enhancement to the element in the form of a fracture surface at an arbitrary position and orientation in the element, we can regularize the solution, model the weakening response, and track the relative motion of the surfaces. To properly model the slip along these surfaces, the traction-displacement response must be properly captured. This report focuses on the development of a constitutive model appropriate to localizing geomaterials, and the embedding of this model into the enhanced finite element framework. This modeling covers two distinct phases. The first, usually brief, phase is the weakening response as the material transitions from intact continuum to a body with a cohesionless fractured surface. Once the cohesion has been eliminated, the response along the surface is completely frictional. We have focused on a rate- and state-dependent frictional model that captures stable and unstable slip along the surface. This model is embedded numerically into the element using a generalized trapezoidal formulation. While the focus is on the constitutive model of interest, the framework is also developed for a general surface response. This report summarizes the major research and development accomplishments for the LDRD project titled 'Cohesive Zone Modeling of Failure in Geomaterials: Formulation and Implementation of a Strong Discontinuity Model Incorporating the Effect of Slip Speed on Frictional Resistance'. This project supported a strategic partnership between Sandia National Laboratories and Stanford University by providing funding for the lead author, Craig Foster, during his doctoral research.

Regueiro, Richard A. (University of Colorado, Boulder, CO); Borja, R. I. (Stanford University, Stanford, CA); Foster, C. D. (Stanford University, Stanford, CA)

2006-10-01T23:59:59.000Z

102

Study of the unusual failure of milliwatt generator strength members  

DOE Green Energy (OSTI)

In order to qualify Milliwatt Generator heat sources for an extended design life, multi-axial mechanical tests were performed on the strength member components. The results of these tests indicated that failure occurred predominantly in the middle of the weld ramp-down (down-slope) zone. Examination of the failure zone by standard metallographic techniques failed to indicate the cause of failure. A modified technique utilizing chemical etching, scanning electron microscopy, and energy dispersive x-ray analysis was employed and dramatically indicated the true cause of failure, viz., inclusions in the parent material which were precipitated along the welds. As a result of the initial investigation, weld parameters for the heat sources were altered and preliminary tests on sample welds suggested that pulse-arc welding eliminate this type of failure.

Zielinski, R.E.; Stacy, E.; Burgan, C.E.

1977-05-16T23:59:59.000Z

103

Materials science and engineering  

Science Conference Proceedings (OSTI)

During FY-96, work within the Materials Science and Engineering Thrust Area was focused on material modeling. Our motivation for this work is to develop the capability to study the structural response of materials as well as material processing. These capabilities have been applied to a broad range of problems, in support of many programs at Lawrence Livermore National Laboratory. These studies are described in (1) Strength and Fracture Toughness of Material Interfaces; (2) Damage Evolution in Fiber Composite Materials; (3) Flashlamp Envelope Optical Properties and Failure Analysis; (4) Synthesis and Processing of Nanocrystalline Hydroxyapatite; and (5) Room Temperature Creep Compliance of Bulk Kel-E.

Lesuer, D.R.

1997-02-01T23:59:59.000Z

104

Application of Fractal Geometry to Failure Analysis  

Science Conference Proceedings (OSTI)

Artificial Intelligence Tools for Failure Event Database Management and Probability Risk Analysis for Failure Prevention · Aviation Accident Investigation ...

105

Infrastructure Failure - Types and Frequency  

U.S. Energy Information Administration (EIA)

Infrastructure Failure - Types and Frequency. Small events that have no impact on supplies Events that require supply/demand responses Events that result in a ...

106

A tribological and biomimetic study of potential bone joint repair materials  

E-Print Network (OSTI)

This research investigates materials for bone-joint failure repair using tribological and biomimicking approaches. The materials investigated represent three different repairing strategies. Refractory metals with and without treatment are candidates for total joint replacements due to their mechanical strength, high corrosion resistance and biocompatibility. A composite of biodegradable polytrimethylene carbonate, hydroxyl apatite, and nanotubes was investigated for application as a tissue engineering scaffold. Non-biodegradable polymer polyimide combined with various concentrations of nanotubes was investigated as a cartilage replacement material. A series of experimental approaches were used in this research. These include analysis of material surfaces and debris using high-resolution techniques and tribological experiments, as well as evaluation of nanomechanical properties. Specifically, the surface structure and wear mechanisms were investigated using a scanning electron microscope and an atomic force microscope. Debris morphology and structure was investigated using a transmission electron microscope. The debris composition was analyzed using an X-ray diffractometer. Nanoindentation was incorporated to investigate the surface nanomechanical properties. Polytrimythelene carbonate combined with hydroxyapatite and nanotubes exhibited a friction coefficient lower than UHMWPE. The nanoindentation response mimicked cartilage more closely than UHMWPE. A composite formed with PI and nanotubes showed a varying friction coefficient and varying nanoindentation response with variation in nanotube concentration. Low friction coefficients corresponded with low modulus values. A theory was proposed to explain this behavior based on surface interactions between nanotubes and between nanotubes and PI. A model was developed to simulate the modulus as a function of nanotube concentration. The boronized refractory metals exhibited brittleness and cracking. Higher friction coefficients were associated with the formation of amorphous debris. The friction coefficient for boronized Cr (~0.06) under simulated body fluid conditions was in the range found in natural joints.

Ribeiro, Rahul

2006-12-01T23:59:59.000Z

107

Structural hierarchies define toughness and defect-tolerance despite simple and mechanically inferior brittle building blocks  

E-Print Network (OSTI)

Mineralized biological materials such as bone, sea sponges or diatoms provide load-bearing and armor functions and universally feature structural hierarchies from nano to macro. Here we report a systematic investigation ...

Sen, Dipanjan

108

Heart Failure:Heart Failure: The Patient's ExperienceThe Patient's Experience  

E-Print Network (OSTI)

1 Heart Failure:Heart Failure: The Patient's ExperienceThe Patient's Experience Jason Ryan, MD, MPHJason Ryan, MD, MPH CoCo--director, UCONN Heart Failure Centerdirector, UCONN Heart Failure Center,084,000 $34.8 billion Background on Heart FailureBackground on Heart Failure 1 Heart failure (HF) is a major

Oliver, Douglas L.

109

Failure-driven software safety  

Science Conference Proceedings (OSTI)

Software safety and software risk management are two of the most important facets of modern software engineering. To understand safety requires that we understand first what is not safe. This paper examines the concept of failure in software engineering ... Keywords: derived requirements, failure, requirements, risk, stakeholder, testing

Richard Riehle

2007-09-01T23:59:59.000Z

110

Mechanical properties of silicon carbide. (Latest citations from Engineered Materials abstracts). NewSearch  

SciTech Connect

The bibliography contains citations concerning the mechanical characteristics and properties of silicon carbides. Citations discuss bend strength, crack propagation, creep rupture strength, ductile brittle fracture, fatigue strength, elastic modulus, shear strength, and tensile strength. Structure and chemistry of fiber/matrix interfaces for silicon carbide fiber reinforced materials are included. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1994-11-01T23:59:59.000Z

111

Geothermal systems materials: a workshop/symposium  

DOE Green Energy (OSTI)

Sixteen papers are included. A separate abstract was prepared for each. Summaries of workshops on the following topics are also included in the report: non-metallic materials, corrosion, materials selection, fluid chemistry, and failure analysis. (MHR)

Not Available

1978-01-01T23:59:59.000Z

112

Failure Atlas for Rolling Bearings in Wind Turbines  

DOE Green Energy (OSTI)

This Atlas is structured as a supplement to the book: T.E. Tallian: Failure Atlas for Hertz Contact Machine Elements, 2nd edition, ASME Press New York, (1999). The content of the atlas comprises plate pages from the book that contain bearing failure images, application data, and descriptions of failure mode, image, and suspected failure causes. Rolling bearings are a critical component of the mainshaft system, gearbox and generator in the rapidly developing technology of power generating wind turbines. The demands for long service life are stringent; the design load, speed and temperature regimes are demanding and the environmental conditions including weather, contamination, impediments to monitoring and maintenance are often unfavorable. As a result, experience has shown that the rolling bearings are prone to a variety of failure modes that may prevent achievement of design lives. Morphological failure diagnosis is extensively used in the failure analysis and improvement of bearing operation. Accumulated experience shows that the failure appearance and mode of failure causation in wind turbine bearings has many distinguishing features. The present Atlas is a first effort to collect an interpreted database of specifically wind turbine related rolling bearing failures and make it widely available. This Atlas is structured as a supplement to the book: T. E. Tallian: Failure Atlas for Hertz Contact Machine Elements, 2d edition, ASME Press New York, (1999). The main body of that book is a comprehensive collection of self-contained pages called Plates, containing failure images, bearing and application data, and three descriptions: failure mode, image and suspected failure causes. The Plates are sorted by main failure mode into chapters. Each chapter is preceded by a general technical discussion of the failure mode, its appearance and causes. The Plates part is supplemented by an introductory part, describing the appearance classification and failure classification systems used, and by several indexes. The present Atlas is intended as a supplement to the book. It has the same structure but contains only Plate pages, arranged in chapters, each with a chapter heading page giving a short definition of the failure mode illustrated. Each Plate page is self contained, with images, bearing and application data, and descriptions of the failure mode, the images and the suspected causes. Images are provided in two resolutions: The text page includes 6 by 9 cm images. In addition, high resolution image files are attached, to be retrieved by clicking on their 'push pin' icon. While the material in the present Atlas is self-contained, it is nonetheless a supplement to the book and the complete interpretation of the terse image descriptions and of the system underlying the failure code presupposes familiarity with the book. Since this Atlas is a supplement to the book, its chapter numbering follows that of the book. Not all failure modes covered in the book have been found among the observed wind turbines. For that reason, and because of the omission of introductory matter, the chapter numbers in this Atlas are not a continuous sequence.

Tallian, T. E.

2006-01-01T23:59:59.000Z

113

Extracting failure knowledge with associative search  

Science Conference Proceedings (OSTI)

We applied associative OR search on a Failure Knowledge Database with 1,242 failure accidents and 41 failure scenarios in the book "100 Scenarios of Failure" to find cases most analogous to risks that engineers were concerned with. Ninety engineers provided ... Keywords: associative search, failure knowledge, risk management

Masayuki Nakao; Kensuke Tsuchiya; Yoshiaki Harita; Kenji Iino; Hiroshi Kinukawa; Satoshi Kawagoe; Yuji Koike; Akihiko Takano

2007-06-01T23:59:59.000Z

114

Thermal Cycling on Fatigue Failure of the Plutonium Vitrification Melter  

SciTech Connect

One method for disposition of excess plutonium is vitrification into cylindrical wasteforms. Due to the hazards of working with plutonium, the vitrification process must be carried out remotely in a shielded environment. Thus, the equipment must be easily maintained. With their simple design, induction melters satisfy this criterion, making them ideal candidates for plutonium vitrification. However, due to repeated heating and cooling cycles and differences in coefficients of thermal expansion of contacting materials fatigue failure of the induction melter is of concern. Due to the cost of the melter, the number of cycles to failure is critical. This paper presents a method for determining the cycles to failure for an induction melter by using the results from thermal and structural analyses as input to a fatigue failure model.

Jordan, Jeffrey; Gorczyca, Jennifer

2009-02-11T23:59:59.000Z

115

Autonomous thruster failure recovery for underactuated spacecraft  

E-Print Network (OSTI)

Thruster failures historically account for a large percentage of failures that have occurred on orbit. Therefore, autonomous thruster failure detection, isolation, and recovery (FDIR) is an essential component to any robust ...

Pong, Christopher Masaru

2010-01-01T23:59:59.000Z

116

Field Guide: Boiler Tube Failure  

Science Conference Proceedings (OSTI)

In conventional and combined-cycle plants, boiler tube failures (BTFs) have been the main availability problem for as long as reliable statistics have been kept for each generating source. The three volumes of the Electric Power Research Institute (EPRI) report Boiler and Heat Recovery Steam Generator Tube Failures: Theory and Practice (1012757) present an in-depth discussion of the various BTF and degradation mechanisms, providing plant owners and operators with the technical basis to address tube failu...

2009-12-22T23:59:59.000Z

117

Assessing High Temperature Failures in Components under ...  

Science Conference Proceedings (OSTI)

These type of failures have occurred in the refinery, petrochemical and power ... Stainless Steels - Some Failure Case Histories from the Norwegian Oil and Gas ...

118

Using Finite Element Analysis in Failure Analysis  

Science Conference Proceedings (OSTI)

Symposium, Charles R. Morin Memorial Symposium on Failure Analysis and ... Tools for Failure Event Database Management and Probability Risk Analysis for ...

119

Condenser Tube Failures: Theory and Practice  

Science Conference Proceedings (OSTI)

This report summarizes information on all aspects of condenser tube failure (CTF) including failure mechanisms, possible root causes, and corrective actions.

2005-12-19T23:59:59.000Z

120

Heat Recovery Steam Generator Materials Selection Guideline  

Science Conference Proceedings (OSTI)

A considerable number of failures have occurred over the past decade in heat recovery steam generators (HRSGs). Many of these failures are attributed to poor design, improper operation, poor fabrication, or poor installation practices, but a number of them are attributed directly to improper material selection. In March 2004, the Electric Power Research Institute (EPRI) published the first heat recovery steam generator materials selection and repair guidelines (HRSG Material Selection and Repair Guidelin...

2010-12-19T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Heart Failure Jason Ryan, MD, MPH  

E-Print Network (OSTI)

1 Heart Failure Jason Ryan, MD, MPH Director, UCONN Heart Failure Center University of Connecticut,084,000 $34.8 billion Background on Heart Failure Heart failure (HF) is a major public health problem resulting in substantial morbidity and mortality 1American Heart Association.2008 Heart and Stroke

Oliver, Douglas L.

122

Lithiation Induced Stress and Failure of Anode Materials in Lithium ...  

Science Conference Proceedings (OSTI)

Interface-Dominated Mechanical Properties of Layered/Fibrous Composites · Interface Bond Strength of HIP-Clad Depleted Uranium and 6061-Aluminum.

123

Accident Investigation and Materials Failure Analysis at the ...  

Science Conference Proceedings (OSTI)

Both are independent federal agencies charged with investigating transportation accidents in all modes, including aviation, railroad, highway, marine, pipeline, ...

124

Real-time quantitative imaging of failure events in materials ...  

reflector aimed at the centre of the cell (Fig.1b), giving a spherical hot zone of diameter ?5mm. Temperatures of test samples in the

125

A simple approach to modeling ductile failure.  

SciTech Connect

Sandia National Laboratories has the need to predict the behavior of structures after the occurrence of an initial failure. In some cases determining the extent of failure, beyond initiation, is required, while in a few cases the initial failure is a design feature used to tailor the subsequent load paths. In either case, the ability to numerically simulate the initiation and propagation of failures is a highly desired capability. This document describes one approach to the simulation of failure initiation and propagation.

Wellman, Gerald William

2012-06-01T23:59:59.000Z

126

Failure rate data for fusion safety and risk assessment  

SciTech Connect

The Fusion Safety Program (FSP) at the Idaho National Engineering Laboratory (INEL) conducts safety research in materials, chemical reactions, safety analysis, risk assessment, and in component research and development to support existing magnetic fusion experiments and also to promote safety in the design of future experiments. One of the areas of safety research is applying probabilistic risk assessment (PRA) methods to fusion experiments. To apply PRA, we need a fusion-relevant radiological dose code and a component failure rate data base. This paper describes the FSP effort to develop a failure rate data base for fusion-specific components.

Cadwallader, L.C.

1993-01-01T23:59:59.000Z

127

Failure rate data for fusion safety and risk assessment  

SciTech Connect

The Fusion Safety Program (FSP) at the Idaho National Engineering Laboratory (INEL) conducts safety research in materials, chemical reactions, safety analysis, risk assessment, and in component research and development to support existing magnetic fusion experiments and also to promote safety in the design of future experiments. One of the areas of safety research is applying probabilistic risk assessment (PRA) methods to fusion experiments. To apply PRA, we need a fusion-relevant radiological dose code and a component failure rate data base. This paper describes the FSP effort to develop a failure rate data base for fusion-specific components.

Cadwallader, L.C.

1993-04-01T23:59:59.000Z

128

HRSG Material Selection and Repair Guidelines  

Science Conference Proceedings (OSTI)

The number of failures in heat recovery steam generator (HRSG) components has been quite high during the past decade. Many of these failures are attributed to poor design, improper operation, poor fabrication, or poor installation practices. This report provides repair practices and procedures currently being used to correct a number of these problems. It also identifies domestic and international materials commonly employed.

2004-03-31T23:59:59.000Z

129

DOE Hydrogen Analysis Repository: Investigating Failure in  

NLE Websites -- All DOE Office Websites (Extended Search)

Investigating Failure in Polymer-Electrolyte Fuel Cells Investigating Failure in Polymer-Electrolyte Fuel Cells Project Summary Full Title: Investigating Failure in Polymer-Electrolyte Fuel Cells Project ID: 175 Principal Investigator: John Newman Brief Description: The goal of this project is to understand and mitigate fuel cell failure mechanisms. Keywords: Fuel cell, modeling Purpose This project is conducting fundamental studies of fuel cell failure mechanisms. This includes experiments aimed at meeting the DOE operation and survivability targets at low and subzero temperatures, as well as development of mathematical models and fundamental experiments to improve performance and design against failure phenomena. Performer Principal Investigator: John Newman Organization: Lawrence Berkeley National Laboratory (LBNL)

130

Computer graphics are brittle  

Science Conference Proceedings (OSTI)

With the entertainment industry focus of this issue, I decided to ask a selection of artists for their thoughts on the broad (and deliberately vague) theme: Art, Computer Graphics and Entertainment. The authors come from a variety of artistic backgrounds, ...

Bruce Sterling

1997-02-01T23:59:59.000Z

131

Solar Thermal Reactor Materials Characterization  

DOE Green Energy (OSTI)

Current research into hydrogen production through high temperature metal oxide water splitting cycles has created a need for robust high temperature materials. Such cycles are further enhanced by the use of concentrated solar energy as a power source. However, samples subjected to concentrated solar radiation exhibited lifetimes much shorter than expected. Characterization of the power and flux distributions representative of the High Flux Solar Furnace(HFSF) at the National Renewable Energy Laboratory(NREL) were compared to ray trace modeling of the facility. In addition, samples of candidate reactor materials were thermally cycled at the HFSF and tensile failure testing was performed to quantify material degradation. Thermal cycling tests have been completed on super alloy Haynes 214 samples and results indicate that maximum temperature plays a significant role in reduction of strength. The number of cycles was too small to establish long term failure trends for this material due to the high ductility of the material.

Lichty, P. R.; Scott, A. M.; Perkins, C. M.; Bingham, C.; Weimer, A. W.

2008-03-01T23:59:59.000Z

132

Loads, capacity, and failure rate modeling  

SciTech Connect

Both failure rate and load capacity (stress-strength) interferenece methodologies are employed in the reliability analysis at nuclear facilities. Both of the above have been utilized in a heuristic failure rate model in terms of load capacity inference. Analytical solutions are used to demonstrate that infant mortality and random aging failures may be expressed implicity in terms of capacity variability, load variability, and capacity deterioration, and that mode interactions play a role in the formation of the bathtub curve for failure rates.

Lewis, E.E.; Chen, Hsin-Chieh

1994-12-31T23:59:59.000Z

133

Failure Analysis of Titanium Dental Implants  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

134

Materials Science  

Science Conference Proceedings (OSTI)

Materials Science. Summary: ... Description: Group focus in materials science (inkjet metrology, micro-macro, advanced characterizations). ...

2012-10-02T23:59:59.000Z

135

Probabilistic Failure Propagation and Transformation Analysis  

Science Conference Proceedings (OSTI)

A key concern in safety engineering is understanding the overall emergent failure behaviour of a system, i.e., behaviour exhibited by the system that is outside its specification of acceptable behaviour. A system can exhibit failure behaviour in many ... Keywords: component-based system, failure, probabilistic analysis, safety analysis

Xiaocheng Ge; Richard F. Paige; John A. Mcdermid

2009-09-01T23:59:59.000Z

136

Failure Analysis in Oil & Gas Industry - Programmaster.org  

Science Conference Proceedings (OSTI)

Failure Analysis and Prevention: Failure Analysis in Oil & Gas Industry ... Failure Analysis Case Studies from Refinery and Petrochemical Pilot Plants: Benjamin ...

137

GROUND PLANE INSULATION FAILURE IN THE FIRST TPC SUPERCONDUCTING COIL  

E-Print Network (OSTI)

is WIUUTEO GROUND PLANE INSULATION FAILURE IN THE FIRST TPCOn August 27, 1980, an insulation failure occurred dt-ringby a failure uf ground plane insulation. ACKNOWLEDGMENTS The

Green, M.A.

2010-01-01T23:59:59.000Z

138

NETL: Advanced Research - Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

High Performance Materials > Chrome Oxide Refractory High Performance Materials > Chrome Oxide Refractory Advanced Research High Performance Materials Chrome Oxide Refractory One notable NETL success is the development of a chrome oxide refractory material capable of working in slagging gasifier conditions. In this project, researchers first determined that one of the major failure mechanisms for chrome oxide refractories exposed to the intense heat and corrosive environment was spalling, or the chipping or flaking of refractory material from an exposed face. They used this information to formulate a high-chrome oxide refractory composition that resists spalling, resulting in a refractory with a longer service life in the gasifier. Inside an ultrasupercritical (USC) pulverized coal power plant, materials are exposed to temperatures up to 760°C and pressures up to 5,000 psi. Operating a USC system can improve power plant efficiency up to 47% and reduce emissions. However, finding boiler and turbine materials that can hold up under extreme conditions requires new high-temperature metal alloys and ceramic coatings, as well as computational modeling research to optimize the processing of these materials. Advanced Research Materials Development program successes in this area include the following:

139

Geothermal steam muffler diffusers: the Geysers, California. Failure analysis report  

DOE Green Energy (OSTI)

The primary failure mechanism for the T304 diffusers was chloride induced stress corrosion cracking (sec.) Once SCC had progressed to a certain point, high cycle corrosion/fatigue proceeded to the final fracture. Alteration of the environment to prevent SCC is not feasible. The existing environment will also cause sulfide stress cracking (SSC) in susceptible materials; therefore, alternate materials must resist SSC as well as SCC. The very large amplitude operational stresses make heat treatment to relieve residual fabrication stress questionable for the prevention of SCC. (MHR)

McAlpin, R.; Ellis, P.F. II

1980-04-01T23:59:59.000Z

140

Failure analysis of ETAC (Enrichment Technology Applications Center) pressure vessel  

Science Conference Proceedings (OSTI)

This report presents the results of an investigation into the failure of a graphite-epoxy composite cylinder. It investigates the quality of the as-fabricated cylinder and provides a verification of compressive material property input used in its design. The design is reevaluated in terms of the adjusted composition and material property input for its suitability for 18,000-psi pressure applications. A comparison between the composition and layup of a cylinder manufactured by Hitco is also provided, as well as the results of a pressurization test of an identical ETAC cylinder tested by the Naval Ocean Systems Center.

Frame, B.J.

1987-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Mechanical properties of silicon carbide. (Latest citations from Engineered Materials abstracts). Published Search  

SciTech Connect

The bibliography contains citations concerning the mechanical characteristics and properties of silicon carbides. Citations discuss bend strength, crack propagation, creep rupture strength, ductile brittle fracture, fatigue strength, elastic modulus, shear strength, and tensile strength. Structure and chemistry of fiber/matrix interfaces for silicon carbide fiber reinforced materials are included. Sintering of silicon carbide and silicon carbide whisker reinforced composites are covered in separate bibliographies. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

NONE

1996-02-01T23:59:59.000Z

142

Old Electrochromic Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrochromic Materials Electrochromic Materials DOE also supports the development of electrochromic coatings through several mechanisms. Three companies are engaged in development of commercial prototypes through the Electrochromics Initiative and an SBIR small business grant. LBNL and another DOE laboratory, the National Renewable Energy Laboratory (NREL) perform a variety of measurements to evaluate the energy performance and durability of these prototypes . Other research activities are intended to assist the efforts of the industry in general. At LBNL, research focuses on rapid development and analysis of electrode materials. Among recent accomplishments was the production of a stoichiometric form of Li0.5Ni0.5O by laser deposition and sputtering with excellent electrochromic properties. Dr. Stuart Cogan of EIC Laboratories tested the films and declared them to have "the highest coloration efficiency of any known anodic electrochromic material." EIC will test the films in their own devices in the near future. We also work on several binary electrodes produced by cosputtering from two targets simultaneously. For example, enhanced forms of tungsten oxide produced in this way have wide application because of the prevalence of tungsten oxide in today's devices. In addition to testing durability, NREL also investigates the degradation mechanisms which lead to failure in the hope of being able to correlate accelerated testing to real time failure as well as to diagnose and correct device problems.

143

Failure Analysis of 6.8 Evaporator Thermowell  

SciTech Connect

The Savannah River Technology Center Materials technology Section was requested to determine the cause of failure for a resistance temperature device and thermowell assembly that was used in the 6.8 Low Activity Waste evaporator. A methodical and well planned approach was used for the failure analysis task with special precautions because of the high radiation and contamination levels. Two sections of the failed assembly were selected for thorough analysis, the bottom of the inner tube with the end-cap and a piece of inner tube at the vapor/waste interface. The failure analysis consisted of macroscopic examination and metallographic analysis. Intergranular attack (IGA) was found to be the primary corrosion mechanism that led to eventual failure. IGA of the end cap occurred because of a presumed preferential microstructure and accelerated the corrosion rate over that of inner-tube side wall. Once the end cap was breached, the waste quickly attacked the RTD components, leading to the low resistance to ground readings that indicated the initial RTD malfunction. A metallographic analysis of an unexposed end cap is recommended to confirm the suspect microstructure.

MICKALONIS, JOHNI.

2004-06-01T23:59:59.000Z

144

New Website Offers Easy Access to NIST Disaster and Failure ...  

Science Conference Proceedings (OSTI)

... failures caused by natural disasters, fires and ... and outcomes of their disaster and failure ... events; associated emergency response and evacuation ...

2011-08-17T23:59:59.000Z

145

Investigation of Catastrophic Failures in High-Power MOSFET ...  

Science Conference Proceedings (OSTI)

Tube Failure in Coal and Gas Fired Power Plant · Understanding Failure of Titanium Alloys Using Fractography and Other Characterization Methods.

146

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Advanced Materials Availability Technology Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And...

147

Light water reactor lower head failure analysis  

SciTech Connect

This document presents the results from a US Nuclear Regulatory Commission-sponsored research program to investigate the mode and timing of vessel lower head failure. Major objectives of the analysis were to identify plausible failure mechanisms and to develop a method for determining which failure mode would occur first in different light water reactor designs and accident conditions. Failure mechanisms, such as tube ejection, tube rupture, global vessel failure, and localized vessel creep rupture, were studied. Newly developed models and existing models were applied to predict which failure mechanism would occur first in various severe accident scenarios. So that a broader range of conditions could be considered simultaneously, calculations relied heavily on models with closed-form or simplified numerical solution techniques. Finite element techniques-were employed for analytical model verification and examining more detailed phenomena. High-temperature creep and tensile data were obtained for predicting vessel and penetration structural response.

Rempe, J.L.; Chavez, S.A.; Thinnes, G.L. [EG and G Idaho, Inc., Idaho Falls, ID (United States)] [and others

1993-10-01T23:59:59.000Z

148

Energy efficiency, market failures, and government policy  

SciTech Connect

This paper presents a framework for evaluating engineering-economic evidence on the diffusion of energy efficiency improvements. Four examples are evaluated within this framework. The analysis provides evidence of market failures related to energy efficiency. Specific market failures that may impede the adoption of cost-effective energy efficiency are discussed. Two programs that have had a major impact in overcoming these market failures, utility DSM programs and appliance standards, are described.

Levine, M.D.; Koomey, J.G.; McMahon, J.E.; Sanstad, A.H. [Lawrence Berkeley Lab., CA (United States). Energy and Environment Div.; Hirst, E. [Oak Ridge National Lab., TN (United States). Energy Div.

1994-03-01T23:59:59.000Z

149

Fossil Power Plant Components Failure Analysis Guideline  

Science Conference Proceedings (OSTI)

The goal of engineering design is to obviate failures. However, this goal is only partially achievable because of the balance between cost and risk, potential deterioration during service, and the departure of actual operation from design assumptions. Thus, utility engineers are periodically faced with failures that span the gamut of power plant equipment and economic and safety consequences. Reaching a proper conclusion about the failure mechanism and the associated root cause is central to the post-fai...

2009-03-31T23:59:59.000Z

150

Materials Characterization | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterization Nuclear Forensics Scanning Probes Related Research Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science &...

151

ICME  

Science Conference Proceedings (OSTI)

Oct 20, 2010 ... Tools, Models, Databases and Simulation Tools Developed and Needed to ... failure response of brittle materials subjected to high-rate deformation. ... ICME, with utility-based, value-added metrics employed for assessment.

152

Failure Analysis in the Aerospace Industry  

Science Conference Proceedings (OSTI)

Oct 29, 2013 ... Investigation of Fatigue Failures of Titanium Alloy Blades Used in Compressor Modules of Aeroderivative Industrial Gas Turbines: Michal ...

153

Failure Investigations Report Highlights Efforts for Safer ...  

Science Conference Proceedings (OSTI)

... the failure of the two World Trade Center (WTC) towers following the ... These proposals address areas such as structural collapse, wind tunnel testing ...

2013-05-14T23:59:59.000Z

154

Failure Analysis of a Reciprocating Compressor Head  

Science Conference Proceedings (OSTI)

Abstract Scope, A major oil company operation experienced a reciprocating compressor failure on one of its offshore platforms. The compressor head on the 1st ...

155

Failure Analysis of a Pressure Transmitter Line  

Science Conference Proceedings (OSTI)

Splitting Tension Test on High-Strength Concretes Studied by Artificial Intelligence and Response Surface Analysis · Spring Failures -The Role of Corrosion in ...

156

DELAYED FAILURE HYDROGEN EMBRITTLEMENT OF ZIRCONIUM. Summary Report, September 15, 1961 to September 14, 1962  

DOE Green Energy (OSTI)

The extent to which zirconium and zirconium alloys exhibit delayed failure (static fatigue) as caused by a combination of absorbed hydrogen and applied stress was investigated. Susceptibility to time-dependent fracture was evaluated for unalloyed zirconium and Zircaloy-2 with 200 and 500 ppm hydrogen as well as for an experimental Zr Al-Sn-Mo alloy and the Canadian Zr-2.5Nb cladding material. For unalloyed zirconium and Zircaloy-2 containing up to 500 ppm hydrogen, no room-temperature, timedependent fracture occurred which could be definitely attributed to the delayed failure phenomenon; an increased grain size, 20% cold deformation by rolling, or corrosion in 750 deg F steam did not significantly affect this behavior. The curve of applied stress versus time to failure at room temperature for the high-strength Zr-Al-Sn--Mo alloy containing 500 ppm hydrcgen established a strong susceptibility to delayed failure due to hydrogen absorption; studies on vacuum-annealed material showed no failures. Further, reduced temperature indicated that the occurrence of static fatigue is temperature dependent. Data for heattreated Zr 2.5Nb containing 500 ppm hydrogen indicated that this material is moderately sensitive to delayed failure at room temperature; higher hydrogen contents caused a greatly increased susceptibility to time-dependent fracture. (auth)

Weinstein, D.; Holtz, F.C.

1962-10-10T23:59:59.000Z

157

Modeling Stress Strain Relationships and Predicting Failure Probabilities For Graphite Core Components  

SciTech Connect

This project will implement inelastic constitutive models that will yield the requisite stress-strain information necessary for graphite component design. Accurate knowledge of stress states (both elastic and inelastic) is required to assess how close a nuclear core component is to failure. Strain states are needed to assess deformations in order to ascertain serviceability issues relating to failure, e.g., whether too much shrinkage has taken place for the core to function properly. Failure probabilities, as opposed to safety factors, are required in order to capture the bariability in failure strength in tensile regimes. The current stress state is used to predict the probability of failure. Stochastic failure models will be developed that can accommodate possible material anisotropy. This work will also model material damage (i.e., degradation of mechanical properties) due to radiation exposure. The team will design tools for components fabricated from nuclear graphite. These tools must readily interact with finite element software--in particular, COMSOL, the software algorithm currently being utilized by the Idaho National Laboratory. For the eleastic response of graphite, the team will adopt anisotropic stress-strain relationships available in COMSO. Data from the literature will be utilized to characterize the appropriate elastic material constants.

Duffy, Stephen

2013-09-09T23:59:59.000Z

158

Case study of slope failures at Spilmans Island  

SciTech Connect

This paper presents a case study for a dredge disposal site called Spilmans Island, located along the Houston-Galveston Ship Channel, east of Houston. Initially classified as a sand bar in the San Jacinto River, Spilmans Island evolved in recent years with the construction of perimeter levees to contain the flow of materials produced from dredging operations. These levees were often constructed on soft dredged sediments, and as the levees were raised, occasionally slope failures occurred. The objectives of this paper are to illustrate the importance of reconstructing the history of a site as a basis for geotechnical analyses, and to demonstrate the significance of keeping accurate records of past investigations, construction activities, slope failures and subsequent remedial measures. The results of the geotechnical investigation described in this paper offer a clear example of how such data can be used to provide reliable predictions on the stability conditions of raised levees.

Kayyal, M.K. [Damascus Univ. (Syrian Arab Republic). Faculty of Civil Engineering; Hasen, M. [HVJ Association, Inc., Houston, TX (United States)

1998-11-01T23:59:59.000Z

159

A study of the failure mechanism of chlorine anodes  

DOE Green Energy (OSTI)

Thin coating RuO{sub 2}{minus}TiO{sub 2} electrodes, which mimic the DSA anodes, have been prepared and tested for their activity toward the chlorine evolution reaction and subjected to life time testing. Rutherford Backscattering Spectrometry has been used concurrently with electrochemical measurements to analyze changes in the ruthenium content of the coating. The decrease in electrode activity is found to be closely related to a decrease in Ru content, and the measured profiles indicate that the loss takes place across the thin coating. Failure is observed for electrodes with a Ru content below a critical concentration, but there is no evidence for the build up of a pure TiO{sub 2} layer. AFM imaging of an anode after failure sustained the hypothesis of loss of material.

Vallet, C.E.; Zuhr, R.A. [Oak Ridge National Lab., TN (United States); Tilak, B.V.; Chen, C.P. [Occidental Chemical Corp., Grand Island, NY (United States)

1995-12-31T23:59:59.000Z

160

Summary of failure analysis activities at Brookhaven National Laboratory  

Science Conference Proceedings (OSTI)

Brookhaven National Laboratory has for many years conducted examinations related to the failures of nuclear materials and components. These examinations included the confirmation of root cause analyses, the determination of the causes of failure, identification of the species that accelerate corrosion, and comparison of the results of nondestructive examinations with those obtained by destructive examination. The results of those examinations, which had previously appeared in various formats (formal and informal reports, journal articles, etc.), have been collected together and summarized in the present report. The report is divided into sections according to the general subject matter (for example, corrosion, fatigue, etc.). Each section presents summaries of the information contained in specific reports and publications, all of which are fully identified as to title, authors, report number or journal reference, date of publication, and FIN number under which the work was performed.

Cowgill, M.G.; Czajkowski, C.J.; Franz, E.M.

1996-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Materials Science Materials Science1354608000000Materials ScienceSome of these resources are LANL-only and will require Remote Access./No/Questions? 667-5809library@lanl.gov Materials Science Some of these resources are LANL-only and will require Remote Access. Key Resources Data Sources Reference Organizations Journals Key Resources CINDAS Materials Property Databases video icon Thermophysical Properties of Matter Database (TPMD) Aerospace Structural Metals Database (ASMD) Damage Tolerant Design Handbook (DTDH) Microelectronics Packaging Materials Database (MPMD) Structural Alloys Handbook (SAH) Proquest Technology Collection Includes the Materials Science collection MRS Online Proceedings Library Papers presented at meetings of the Materials Research Society Data Sources

162

Materials of Gasification  

DOE Green Energy (OSTI)

The objective of this project was to accumulate and establish a database of construction materials, coatings, refractory liners, and transitional materials that are appropriate for the hardware and scale-up facilities for atmospheric biomass and coal gasification processes. Cost, fabricability, survivability, contamination, modes of corrosion, failure modes, operational temperatures, strength, and compatibility are all areas of materials science for which relevant data would be appropriate. The goal will be an established expertise of materials for the fossil energy area within WRI. This would be an effort to narrow down the overwhelming array of materials information sources to the relevant set which provides current and accurate data for materials selection for fossil fuels processing plant. A significant amount of reference material on materials has been located, examined and compiled. The report that describes these resources is well under way. The reference material is in many forms including texts, periodicals, websites, software and expert systems. The most important part of the labor is to refine the vast array of available resources to information appropriate in content, size and reliability for the tasks conducted by WRI and its clients within the energy field. A significant has been made to collate and capture the best and most up to date references. The resources of the University of Wyoming have been used extensively as a local and assessable location of information. As such, the distribution of materials within the UW library has been added as a portion of the growing document. Literature from recent journals has been combed for all pertinent references to high temperature energy based applications. Several software packages have been examined for relevance and usefulness towards applications in coal gasification and coal fired plant. Collation of the many located resources has been ongoing. Some web-based resources have been examined.

None

2005-09-15T23:59:59.000Z

163

Reactor Materials  

Energy.gov (U.S. Department of Energy (DOE))

The reactor materials crosscut effort will enable the development of innovative and revolutionary materials and provide broad-based, modern materials science that will benefit all four DOE-NE...

164

A survey of online failure prediction methods  

Science Conference Proceedings (OSTI)

With the ever-growing complexity and dynamicity of computer systems, proactive fault management is an effective approach to enhancing availability. Online failure prediction is the key to such techniques. In contrast to classical reliability methods, ... Keywords: Error, failure prediction, fault, prediction metrics, runtime monitoring

Felix Salfner; Maren Lenk; Miroslaw Malek

2010-03-01T23:59:59.000Z

165

Evaluation of failure probability via surrogate models  

Science Conference Proceedings (OSTI)

Evaluation of failure probability of a given system requires sampling of the system response and can be computationally expensive. Therefore it is desirable to construct an accurate surrogate model for the system response and subsequently to sample the ... Keywords: Failure probability, Polynomial chaos, Sampling, Stochastic computation

Jing Li; Dongbin Xiu

2010-11-01T23:59:59.000Z

166

Evaluation of arresters' failure probability using ANN  

Science Conference Proceedings (OSTI)

Lightning is a major cause of faults on overhead transmission high voltage lines. In order to improve the lightning performance of the lines and to reduce the failure rate, surge arresters are installed between each phase and earth. The failure probability ... Keywords: Simulink®7.1 package, artificial neural networks, surge arresters, transmission lines

C. A. Christodoulou; I. A. Stathopulos

2008-08-01T23:59:59.000Z

167

Materials - Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Assessment The staff of the Energy Systems Division has a long history of technical and economic analysis of the production and recycling of materials for transportation...

168

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science science-innovationassetsimagesicon-science.jpg Materials Science National security depends on science and technology. The United States relies on Los Alamos...

169

Refractory failure in IGCC fossil fuel power systems  

DOE Green Energy (OSTI)

Current generation refractory materials used in slagging gasifiers employed in Integrated Gasification Combined Cycle (IGCC) fossil fuel power systems have unacceptably short service lives, limiting the reliability and cost effectiveness of gasification as a means to generate power. The short service life of the refractory lining results from exposure to the extreme environment inside the operating gasifier, where the materials challenges include temperatures to 1650 C, thermal cycling, alternating reducing and oxidizing conditions, and the presence of corrosive slags and gases. Compounding these challenges is the current push within the industry for fuel flexibility, which results in slag chemistries and operating conditions that can vary widely as the feedstock for the gasifier is supplemented with alternative sources of carbon, such as petroleum coke and biomass. As a step toward our goal of developing improved refractory materials for this application, we have characterized refractory-slag interactions, under a variety of simulated gasifier conditions, utilizing laboratory exposure tests such as the static cup test and a gravimetric test. Combining this information with that gained from the post-mortem analyses of spent refractories removed from working gasifiers, we have developed a better understanding of refractory failure in gasifier environments. In this paper, we discuss refractory failures in slagging gasifiers and possible strategies to reduce them. Emphasis focuses on the refractories employed in gasifier systems which utilize coal as the primary feedstock.

Dogan, Cynthia P.; Kwong, Kyei-Sing; Bennett, James P.; Chinn, Richard E.

2001-01-01T23:59:59.000Z

170

Thermoelectric Materials  

Science Conference Proceedings (OSTI)

Thermoelectric materials can generate electricity or provide cooling by converting thermal gradients to electricity or electricity to thermal gradients. More efficient thermoelectric materials would make feasible the widespread use of thermoelectric converters in mundane applications. This report summarizes the state-of-the-art of thermoelectric materials including currently available materials and applications, new developments, and future prospects.

2000-01-14T23:59:59.000Z

171

Thermo-mechanical failure criteria for x-ray windows and filters and comparison with experiments  

SciTech Connect

Synchrotron x-ray windows are vacuum separators and are usually made of thin beryllium metal. Filters are provided upstream of the window to filter out the soft x-rays to protect the window from overheating and failing. The filters are made of thin carbon products or sometimes beryllium, the same material as the window. Because the window is a vacuum separator, understanding its potential structural failure under thermal load is very important. Current structural failure models for the brazed windows and filters under thermal stresses are not very accurate. Existing models have been carefully examined and found to be inconsistent with the actual failure modes of windows tested. Due to the thinness of the filter/window, the most likely failure mode is thermal buckling. In fact, recent synchrotron tests conducted in Japan on window failures bear out this position. In this paper, failure criteria for filters/windows are proposed, and analyses are performed and compared with the experimental results from various sources. A consistent result is found between the analysis and reported experiments. A series of additional analyses based on the proposed failure criteria is also carried out for filter and window designs for the third generation synchrotron beamline front ends. Comparative results are presented here.

Wang, Z.; Kuzay, T.M.

1993-07-01T23:59:59.000Z

172

NREL Test-to-Failure Protocol (Presentation)  

DOE Green Energy (OSTI)

The presentation describes the test-to-failure protocol that was developed and piloted at NREL, stressing PV modules with multiple applications of damp heat (with bias) and thermal cycling until they fail.

Hacke, P.

2012-03-01T23:59:59.000Z

173

Local Failure in Resected N1 Lung Cancer: Implications for Adjuvant Therapy  

SciTech Connect

Purpose: To evaluate actuarial rates of local failure in patients with pathologic N1 non-small-cell lung cancer and to identify clinical and pathologic factors associated with an increased risk of local failure after resection. Methods and Materials: All patients who underwent surgery for non-small-cell lung cancer with pathologically confirmed N1 disease at Duke University Medical Center from 1995-2008 were identified. Patients receiving any preoperative therapy or postoperative radiotherapy or with positive surgical margins were excluded. Local failure was defined as disease recurrence within the ipsilateral hilum, mediastinum, or bronchial stump/staple line. Actuarial rates of local failure were calculated with the Kaplan-Meier method. A Cox multivariate analysis was used to identify factors independently associated with a higher risk of local recurrence. Results: Among 1,559 patients who underwent surgery during the time interval, 198 met the inclusion criteria. Of these patients, 50 (25%) received adjuvant chemotherapy. Actuarial (5-year) rates of local failure, distant failure, and overall survival were 40%, 55%, and 33%, respectively. On multivariate analysis, factors associated with an increased risk of local failure included a video-assisted thoracoscopic surgery approach (hazard ratio [HR], 2.5; p = 0.01), visceral pleural invasion (HR, 2.1; p = 0.04), and increasing number of positive N1 lymph nodes (HR, 1.3 per involved lymph node; p = 0.02). Chemotherapy was associated with a trend toward decreased risk of local failure that was not statistically significant (HR, 0.61; p = 0.2). Conclusions: Actuarial rates of local failure in pN1 disease are high. Further investigation of conformal postoperative radiotherapy may be warranted.

Higgins, Kristin A., E-mail: kristin.higgins@duke.edu [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States); Chino, Junzo P. [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States); Berry, Mark [Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC (United States); Ready, Neal [Department of Medicine, Division of Medical Oncology, Duke University Medical Center, Durham, NC (United States); Boyd, Jessamy [US Oncology, Dallas, TX (United States); Yoo, David S.; Kelsey, Chris R. [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States)

2012-06-01T23:59:59.000Z

174

Substation distribution transformers failures and spares  

Science Conference Proceedings (OSTI)

Electric utilities should have a sufficient number of spare transformers to backup substation distribution transformers to replace transformers that fail and require factory rebuild or replacement. To identify such a number, the statistical methodology was developed to analyze available failure data for different groups of transformer. That methodology enables the estimation of future numbers of failures with associated probabilities, recommends the proper number of spares, identifies the necessity and shows the means to shorten the transformer`s replacement time.

Kogan, V.I. Roeger, C.J.; Tipton, D.E. [American Electric Power Service Corp., Columbus, OH (United States)

1996-11-01T23:59:59.000Z

175

Magnetocaloric Materials  

Science Conference Proceedings (OSTI)

Magnetic Materials for Energy Applications IV: Magnetocaloric Materials ... due to cost-effectiveness as well as superior magneto-thermal characteristics. ... metals and p-block elements can be explored in a time- and energy-saving manner.

176

Multi-Hazard Failure Analysis Information at NIST  

Science Conference Proceedings (OSTI)

... Failure of Cooling Tower West Virginia 1978 (08/11/2011). Failure of ... FAQs - NIST WTC Towers Investigation (09/20/2011). Final Reports from the ...

2010-09-23T23:59:59.000Z

177

Adhesive Anchor Failure in Boston's Big Dig Tunnel System  

Science Conference Proceedings (OSTI)

Failure Analysis Case Studies from Refinery and Petrochemical Pilot Plants ... Failure of Electrical Submersible Pump of Oil Reservoir · Fan Blade Fracture in a  ...

178

Failure Analysis of a Rupture Disk Assembly by Electron Microscopy ...  

Science Conference Proceedings (OSTI)

Symposium, Charles R. Morin Memorial Symposium on Failure Analysis and ... Tools for Failure Event Database Management and Probability Risk Analysis for ...

179

An Interactive Case Study in Composite Failure Analysis  

Science Conference Proceedings (OSTI)

In the case study, the audience will be presented with the failure scenario and key ... Advanced Digital Microscopy is Revolutionizing Failure Analysis.

180

Failure Analysis and Manufacturing Process Review of an NAS626 ...  

Science Conference Proceedings (OSTI)

Boiler Stack Economizer Tube Failure · Case Studies in Environmentally Assisted Failures: Solving Their Problem When You Don't Know the Cause.

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Materials Science  

Science Conference Proceedings (OSTI)

Materials Science. Summary: Key metrologies/systems: In situ spectroscopic ellipsometry, linear and non-linear spectroscopies ...

2012-10-02T23:59:59.000Z

182

Training Materials  

Science Conference Proceedings (OSTI)

Training Materials. NIST Handbook 44 Self-Study Course. ... Chapter 3 – Organization and Format of NIST Handbook 44 DOC. ...

2011-08-10T23:59:59.000Z

183

Material matting  

Science Conference Proceedings (OSTI)

Despite the widespread use of measured real-world materials, intuitive tools for editing measured reflectance datasets are still lacking. We present a solution inspired by natural image matting and texture synthesis to the material matting problem, ... Keywords: appearance models, material separation, matting, spatially-varying BRDFs, texture synthesis

Daniel Lepage; Jason Lawrence

2011-12-01T23:59:59.000Z

184

Materializing energy  

Science Conference Proceedings (OSTI)

Motivated and informed by perspectives on sustainability and design, this paper draws on a diverse body of scholarly works related to energy and materiality to articulate a perspective on energy-as-materiality and propose a design approach of ... Keywords: design, design theory, energy, materiality, sustainability

James Pierce; Eric Paulos

2010-08-01T23:59:59.000Z

185

Materials Education Community  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

186

Emerging Materials Technologies  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

187

Established Materials Technologies  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

188

Nano-chemo-mechanics of advanced materials for hydrogen storage and lithium battery applications .  

E-Print Network (OSTI)

??Chemo-mechanics studies the material behavior and phenomena at the interface of mechanics and chemistry. Material failures due to coupled chemo-mechanical effects are serious roadblocks in… (more)

Huang, Shan

2011-01-01T23:59:59.000Z

189

A study of lithium ion intercalation induced fracture of silicon particles used as anode material in Li-ion battery  

Science Conference Proceedings (OSTI)

The fracture of Si particles due to internal stresses formed during the intercalation of lithium ions was described by means of thermal analogy model and brittle fracture damage parameter. The stresses were calculated following the diffusion equation and equations of elasticity with appropriate volumetric expansion term. The damage parameter takes into account triaxiality of the stress state and change in elasticity upon tension and compression, and represents the probability of fracture under given stress state, - an approach suitable for brittle materials. The results were compared with the acoustic emission data from the experiments on electrochemical cycling of Li ion half-cells with silicon electrodes. A good correlation between experiment and prediction was observed.

Daniel, Claus [ORNL; Kalnaus, Sergiy [ORNL; Rhodes, Kevin [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

190

2008 Midwest Levee Failure: Erosion Studies  

E-Print Network (OSTI)

The United States contains an estimated 100,000 miles (160000 km) of levees in which erosion related issues are the top priorities. Proper documentation of overtopping induced erosion is a complicated issue involving the collection and analysis of timesensitive field data and personal observations. This thesis is a study of the performance of the Midwest Levee system during the 2008 flooding events. The goal of the Midwest Levee investigation was to gather and analyze perishable data in an effort to provide a comprehensive overview at each breach location. To predict how a site will perform during a particular flood event, there are three main inputs: the flood conditions, the site conditions, and the soil properties. Site geometry and imperfections can greatly affect the performance of a levee system. Any low spots or potential seepage paths can concentrate the flow and be detrimental to the levee. The vegetative cover is the single most important condition at a site. As seen in the Brevator case, vegetative armor can prevent failure of a levee comprised of less resistant soils subjected to long periods of overtopping. Recommended grasses include: Switchgrass, Smooth Brome, Reed Canarygrass, and Tall Fescue. It is also recommended that grasses are kept at least 0.5 m tall during the flood season and to limit the presence of trees to 10 m beyond the levee toe. The erosion resistance of the materials comprising the levee is also important. From the correlations in this study, it was determined that erodibility is influenced by grain size, relative compaction, clay content, and activity. Devices like the Torvane and Pocket Erodometer can also be used to get a quick field estimate of erosion. While these correlations and field devices give insight into an erodibility value, they are no substitute for site specific analysis with laboratory equipment such as the Erosion Function Apparatus. Soil behavior is highly nonlinear and the entire erosion function is needed to get an accurate measure of the erodibility of a soil. By combining these properties in an erosion matrix, a prediction of whether a site will withstand a given flood event can be made.

Bernhardt, Michelle Lee

2009-12-01T23:59:59.000Z

191

On the fracture toughness of advanced materials  

Science Conference Proceedings (OSTI)

Few engineering materials are limited by their strength; rather they are limited by their resistance to fracture or fracture toughness. It is not by accident that most critical structures, such as bridges, ships, nuclear pressure vessels and so forth, are manufactured from materials that are comparatively low in strength but high in toughness. Indeed, in many classes of materials, strength and toughness are almost mutually exclusive. In the first instance, such resistance to fracture is a function of bonding and crystal structure (or lack thereof), but can be developed through the design of appropriate nano/microstructures. However, the creation of tough microstructures in structural materials, i.e., metals, polymers, ceramics and their composites, is invariably a compromise between resistance to intrinsic damage mechanisms ahead of the tip of a crack (intrinsic toughening) and the formation of crack-tip shielding mechanisms which principally act behind the tip to reduce the effective 'crack-driving force' (extrinsic toughening). Intrinsic toughening is essentially an inherent property of a specific microstructure; it is the dominant form of toughening in ductile (e.g., metallic) materials. However, for most brittle (e.g., ceramic) solids, and this includes many biological materials, it is largely ineffective and toughening conversely must be developed extrinsically, by such shielding mechanisms as crack bridging. From a fracture mechanics perspective, this results in toughening in the form of rising resistance-curve behavior where the fracture resistance actually increases with crack extension. The implication of this is that in many biological and high-strength advanced materials, toughness is developed primarily during crack growth and not for crack initiation. This is an important realization yet is still rarely reflected in the way that toughness is measured, which is invariably involves the use of single-value (crack-initiation) parameters such as the fracture toughness K{sub Ic}.

Launey, Maximilien E.; Ritchie, Robert O.

2008-11-24T23:59:59.000Z

192

CONGESTIVE HEART FAILURE Congestive Heart Failure: Condition in which the heart muscle can not pump enough  

E-Print Network (OSTI)

CONGESTIVE HEART FAILURE Congestive Heart Failure: Condition in which the heart muscle can not pump enough blood to the body to meet the organs demands. Heart muscle dilatation, muscle fibers hypertrophy, and increased heart rate are the clinical markers of disease progression as the heart attempts to compensate

193

Minor Materials  

Science Conference Proceedings (OSTI)

Table 1   Materials used in glass manufacture...Table 1 Materials used in glass manufacture Material Purpose Antimony oxide (Sb 2 O 3 ) Decolorizing and fining agent Aplite (K, Na, Ca, Mg, alumina silicate) Source of alumina Aragonite (CaCO 3 ) Source of calcium oxide Arsenic oxide (As 2 O 3 ) Fining and decolorizing agent Barite/barytes (BaSO 4 )...

194

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1992-01-01T23:59:59.000Z

195

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1994-06-07T23:59:59.000Z

196

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1992-07-28T23:59:59.000Z

197

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1994-01-01T23:59:59.000Z

198

Documentation of Steam Turbine-Generator Failures—2010  

Science Conference Proceedings (OSTI)

This technical update report presents a review of turbine-generator failures that occurred during 2010.

2011-02-28T23:59:59.000Z

199

A study of end-to-end web access failures  

Science Conference Proceedings (OSTI)

We present a study of end-to-end web access failures in the Internet. Part of our characterization of failures is based on directly observable end-to-end information. We also present novel analyses that reveal aspects of end-to-end failures that would ... Keywords: BGP, DNS, HTTP, TCP, web access, web failure

Venkata N. Padmanabhan; Sriram Ramabhadran; Sharad Agarwal; Jitendra Padhye

2006-12-01T23:59:59.000Z

200

Subsurface Characterization at Ground Failure Sites in Adapazari, Turkey  

E-Print Network (OSTI)

ground failure. Lastly, ?ve CPTs and three borings were com- pleted at the Adapazari Electrical Substation,

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Advanced Materials Advanced Materials Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And Membrane Express Licensing Analysis Of Macromolecule, Liggands And Macromolecule-Lingand Complexes Express Licensing Carbon Microtubes Express Licensing Chemical Synthesis Of Chiral Conducting Polymers Express Licensing Forming Adherent Coatings Using Plasma Processing Express Licensing Hydrogen Scavengers Express Licensing Laser Welding Of Fused Quartz Express Licensing Multiple Feed Powder Splitter Negotiable Licensing Boron-10 Neutron Detectors for Helium-3 Replacement Negotiable Licensing Insensitive Extrudable Explosive Negotiable Licensing Durable Fuel Cell Membrane Electrode Assembly (MEA) Express Licensing Method of Synthesis of Proton Conducting Materials

202

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Conducting Materials Negotiable Licensing Microseismic Tracer Particles for Hydraulic Fracturing Negotiable Licensing A Photo-Stimulated Low Electron Temperature High Current...

203

Magnetic Materials  

Science Conference Proceedings (OSTI)

Oct 27, 2009 ... Extreme magnetic fields (>2 tesla), especially when combined with temperature, are being shown to revolutionize materials processing and ...

204

materials processing  

Science Conference Proceedings (OSTI)

... of the Stainless Steel Elaborated by the Duplex Procedure (Electric Furnace- VOD Installation) [pp. ... Materials Processing on a Solar Furnace Satellite [pp.

205

Materials Studio  

Science Conference Proceedings (OSTI)

Jan 14, 2008 ... G. Fitzgerald; G. Goldbeck-Wood; P. Kung; M. Petersen; L. Subramanian; J. Wescott, " Materials Modeling from Quantum Mechanics to The ...

206

Nuclear Materials  

Science Conference Proceedings (OSTI)

Materials and Fuels for the Current and Advanced Nuclear Reactors III ... response of oxide ceramics for nuclear applications through experiment, theory, and ...

207

Complex Failure Forewarning System - DHS Conference Proceedings  

SciTech Connect

As the critical infrastructures of the United States have become more and more dependent on public and private networks, the potential for widespread national impact resulting from disruption or failure of these networks has also increased. Securing the nation s critical infrastructures requires protecting not only their physical systems but, just as important, the cyber portions of the systems on which they rely. A failure is inclusive of random events, design flaws, and instabilities caused by cyber (and/or physical) attack. One such domain, aging bridges, is used to explain the Complex Structure Failure Forewarning System. We discuss the workings of such a system in the context of the necessary sensors, command and control and data collection as well as the cyber security efforts that would support this system. Their application and the implications of this computing architecture are also discussed, with respect to our nation s aging infrastructure.

Abercrombie, Robert K [ORNL; Hively, Lee M [ORNL; Prowell, Stacy J [ORNL; Schlicher, Bob G [ORNL; Sheldon, Frederick T [ORNL

2011-01-01T23:59:59.000Z

208

Browns Ferry Corrosion Failure Data Assessment  

Science Conference Proceedings (OSTI)

This report provides a summary of the poolside inspection results from an inspection performed in 2011 of GE6 8x8 fuel that operated in Browns Ferry-3 and failed as a result of a corrosion-related mechanism in cycle 8 in 1998. It also provides an assessment of these results relative to prior crud-induced localized corrosion– (CILC-) type failures in the early 1980s and subsequent corrosion-related failures from 2002 to 2004 in the same unit and its sister unit Browns Ferry-2. In particular, ...

2012-09-27T23:59:59.000Z

209

Fuel Reliability Program: Browns Ferry Fuel Corrosion Failures Root Cause Investigation  

Science Conference Proceedings (OSTI)

Sixty-three GE13 fuel bundles failed in Browns Ferry Unit 2 (BF2) during Cycle 12; three GE13 assemblies failed in BF Unit 3 (BF3) during Cycle 11. The affected fuel in BF2 was in its second cycle of operation and the fuel in BF3 in its third at the time of failure. Global Nuclear Fuel (GNF), General Electric-Hitachi (GEH), Tennessee Valley Authority (TVA), and the Electric Power Research Institute (EPRI) investigated the cause of the failures. The investigation included evaluations of materials and manu...

2010-09-30T23:59:59.000Z

210

Nanopower: Avoiding Electrolyte Failure in Nanoscale Lithium ...  

Science Conference Proceedings (OSTI)

... most of which is the battery itself—which ... wide—solid-state lithium ion batteries to see just ... cathode material, electrolyte, and anode materials with ...

2012-04-11T23:59:59.000Z

211

Materials Science Advanced Materials News  

Science Conference Proceedings (OSTI)

... Contributes to Discovery of Novel Quantum Spin-Liquid Release Date ... Novel Filter Material Could Cut Natural Gas Refining Costs Release Date: 03 ...

2010-12-16T23:59:59.000Z

212

Materials Science Advanced Materials Portal  

Science Conference Proceedings (OSTI)

... to Discovery of Novel Quantum Spin-Liquid. illustration of metal organic framework Novel Filter Material Could Cut Natural Gas Refining Costs. ...

2013-06-27T23:59:59.000Z

213

Mobile service innovation: A European failure  

Science Conference Proceedings (OSTI)

The continuing absence of innovation in Europe's mobile services industry is identified and characterised here, with such examples as mobile Internet and mobile music. Innovation failure is a critical factor leading to a lack of high-income jobs, network ... Keywords: Competition, Convergence, Europe, Innovation, Internet, Japan, Mobile telecommunications, Network effects, Service quality, Spectrum regulation, Standardisation

Arnd Weber; Michael Haas; Daniel Scuka

2011-06-01T23:59:59.000Z

214

Adaptation Space: Surviving Non-Maskable Failures  

E-Print Network (OSTI)

Some failures cannot be masked by redundancies, because an unanticipated situation occurred, because fault-tolerance measures were not adequate, or because there was a security breach (which is not amenable to replication). Applications that wish to continue to offer some service despite nonmaskable failure must adapt to the loss of resources. When numerous combinations of non-maskable failure modes are considered, the set of possible adaptations becomes complex. This paper presents adaptation spaces, a formalism for navigating among combinations of adaptations. An adaptation space describes a collection of possible adaptations of a software component or system, and provides a uniform way of viewing a group of alternative software adaptations. Adaptation spaces describe the different means for monitoring the conditions that different adaptations depend on, and the particular configurations through which an adaptive application navigate. Our goal is to use adaptation spaces to provide survivable services to applications despite non-maskable failures such as malicious attacks. We present the basic concepts concerning adaptation spaces, with examples. We then present a formal model for reasoning about and selecting alternative adaptations, allowing developers of survivable application to automate their system’s adaptive behavior. 1

Crispin Cowan; Lois Delcambre; Anne-francoise Le Meur; Ling Liu; David Maier; Dylan Mcnamee; Michael Miller; Calton Pu; Perry Wagle; Jonathan Walpole

1998-01-01T23:59:59.000Z

215

Exploratory case study research: Outsourced project failure  

Science Conference Proceedings (OSTI)

Context: IT plays an increasingly strategic role in the business performance of organizations, however, the development of strategic IT systems involves a high degree of risk and outsourcing the development of such systems increases the risk. Objective: ... Keywords: Case study methodology, Outsourced software development, Project failure, Risk framework, Software development risk factors

J. M. Verner; L. M. Abdullah

2012-08-01T23:59:59.000Z

216

Materials - Home  

NLE Websites -- All DOE Office Websites (Extended Search)

* Coatings & Lubricants * Coatings & Lubricants * Nanofluids * Deformation Joining * Recycling * Catalysts * Assessment * Illinois Center for Advanced Tribology Modeling, Simulation & Software Plug-In Hybrid Electric Vehicles PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC Materials ring on liner reciprocating tester Tribology Lab: Ring-on-liner reciprocating tester. Argonne National Laboratory plays an important role in the Department of Energy's (DOE's) efforts to develop advanced materials for transportation. The materials are developed with DOE support from the EERE Office of Vehicle Technology and Office of Hydrogen, Fuel Cells, and Infrastructure Technologies in collaboration with worldwide industrial partners. Examples

217

An Investigation of Digital Instrumentation and Control System Failure Modes  

SciTech Connect

A study sponsored by the Nuclear Regulatory Commission study was conducted to investigate digital instrumentation and control (DI&C) systems and module-level failure modes using a number of databases both in the nuclear and non-nuclear industries. The objectives of the study were to obtain relevant operational experience data to identify generic DI&C system failure modes and failure mechanisms, and to obtain generic insights, with the intent of using results to establish a unified framework for categorizing failure modes and mechanisms. Of the seven databases studied, the Equipment Performance Information Exchange database was found to contain the most useful data relevant to the study. Even so, the general lack of quality relative to the objectives of the study did not allow the development of a unified framework for failure modes and mechanisms of nuclear I&C systems. However, an attempt was made to characterize all the failure modes observed (i.e., without regard to the type of I&C equipment under consideration) into common categories. It was found that all the failure modes identified could be characterized as (a) detectable/preventable before failures, (b) age-related failures, (c) random failures, (d) random/sudden failures, or (e) intermittent failures. The percentage of failure modes characterized as (a) was significant, implying that a significant reduction in system failures could be achieved through improved online monitoring, exhaustive testing prior to installation, adequate configuration control or verification and validation, etc.

Korsah, Kofi [ORNL; Cetiner, Mustafa Sacit [ORNL; Muhlheim, Michael David [ORNL; Poore III, Willis P [ORNL

2010-01-01T23:59:59.000Z

218

thermoelectric materials  

E-Print Network (OSTI)

It has been proven that the maximum cooling temperature of a thermoelectric material can be increased by using either pulsed operation or graded Seebeck profiles. In this paper, we show that the maximum cooling temperature can be further increased by the pulsed operation of optimal inhomogeneous thermoelectric materials. A random sampling method is used to obtain the optimal electrical conductivity profile of inhomogeneous materials, which can achieve a much higher cooling temperature than the best uniform materials under the steady-state condition. Numerical simulations of pulsed operation are then carried out in the time domain. In the limit of low thermoelectric figure-of-merit ZT, the finite-difference time-domain simulations are verified by an analytical solution for homogeneous material. This numerical method is applied to high ZT BiTe materials and simulations show that the effective figure-of-merit can be improved by 153 % when both optimal graded electrical conductivity profiles and pulsed operation are used. 1.

Q Zhou; Z Bian; A Shakouri

2007-01-01T23:59:59.000Z

219

Celiac Node Failure Patterns After Definitive Chemoradiation for Esophageal Cancer in the Modern Era  

Science Conference Proceedings (OSTI)

Purpose: The celiac lymph node axis acts as a gateway for metastatic systemic spread. The need for prophylactic celiac nodal coverage in chemoradiation therapy for esophageal cancer is controversial. Given the improved ability to evaluate lymph node status before treatment via positron emission tomography (PET) and endoscopic ultrasound, we hypothesized that prophylactic celiac node irradiation may not be needed for patients with localized esophageal carcinoma. Methods and Materials: We reviewed the radiation treatment volumes for 131 patients who underwent definitive chemoradiation for esophageal cancer. Patients with celiac lymph node involvement at baseline were excluded. Median radiation dose was 50.4 Gy. The location of all celiac node failures was compared with the radiation treatment plan to determine whether the failures occurred within or outside the radiation treatment field. Results: At a median follow-up time of 52.6 months (95% CI 46.1-56.7 months), 6 of 60 patients (10%) without celiac node coverage had celiac nodal failure; in 5 of these patients, the failures represented the first site of recurrence. Of the 71 patients who had celiac coverage, only 5 patients (7%) had celiac region relapse. In multivariate analyses, having a pretreatment-to-post-treatment change in standardized uptake value on PET >52% (odds ratio [OR] 0.198, p = 0.0327) and having failure in the clinical target volume (OR 10.72, p = 0.001) were associated with risk of celiac region relapse. Of those without celiac coverage, the 6 patients that later developed celiac failure had a worse median overall survival time compared with the other 54 patients who did not fail (median overall survival time: 16.5 months vs. 31.5 months, p = 0.041). Acute and late toxicities were similar in both groups. Conclusions: Although celiac lymph node failures occur in approximately 1 of 10 patients, the lack of effective salvage treatments and subsequent low morbidity may justify prophylactic treatment in distal esophageal cancer patients.

Amini, Arya [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); UC Irvine School of Medicine, Irvine, California (United States); Xiao Lianchun [Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Allen, Pamela K. [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Suzuki, Akihiro; Hayashi, Yuki [Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Liao, Zhongxing [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Hofstetter, Wayne [Department of Thoracic and Cardiovascular Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Crane, Christopher; Komaki, Ritsuko [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Bhutani, Manoop S.; Lee, Jeffrey H.; Ajani, Jaffer A. [Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States); Welsh, James, E-mail: jwelsh@mdanderson.org [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas (United States)

2012-06-01T23:59:59.000Z

220

Fuel Reliability Monitoring and Failure Evaluation Handbook (2010)  

Science Conference Proceedings (OSTI)

Utilities seek to operate with a defect-free core; but in a typical nuclear plant with its 40,000 to 75,000 fuel rods fuel failures resulting from various mechanisms do occur. The industry has devoted considerable effort to prevent fuel failures and, in the event of a fuel failure, to monitor ongoing failures and assess and minimize the impact on plant operation. The industry has also instituted aggressive measures to evaluate the failure root cause and prevent recurrence of the same failure mechanisms. ...

2010-11-19T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Gas Turbine Superalloy Material Property Handbook for Blades  

Science Conference Proceedings (OSTI)

Published material property data on superalloy bucket (blade) materials used in land-based combustion turbines is meager and widely scattered in literature. This handbook provides a comprehensive resource of material property data for superalloys used in combustion turbine buckets. Such data are critical for use in remaining life assessment calculations, failure analysis, comparison of various alloys, and alloy selection. The material data presented in this handbook were developed from experimental alloy...

2003-07-18T23:59:59.000Z

222

Hardfacing material  

SciTech Connect

A method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of boron, carbon, silicon and phosphorus. The mixture is formed into an alloy and cooled to form a metallic material having a hardness of greater than about 9.2 GPa. The invention includes a method of forming a wire by combining a metal strip and a powder. The metal strip and the powder are rolled to form a wire containing at least 55% iron and from two to seven additional elements including at least one of C, Si and B. The invention also includes a method of forming a hardened surface on a substrate by processing a solid mass to form a powder, applying the powder to a surface to form a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.

Branagan, Daniel J. (Iona, ID)

2012-01-17T23:59:59.000Z

223

DELAYED FAILURE HYDROGEN EMBRITTLEMENT OF ZIRCONIUM. Quarterly Report No. 3, March 15, 1962-June 14, 1962  

DOE Green Energy (OSTI)

An investigation was made to determine the extent to which zirconium and zirconium alloys exhibit delayed failure (static fatigue) as caused by a combination of absorbed hydrogen and applied stress. Evaluation of susceptibility to time-dependent fracture was performed on an experimental Zr-- Al-- Sn-- Mo alloy containing 500 ppm hydrogen and the Canadian Zr-2.5Nb cladding material, as well as unalloyed zirconium and Zircaloy-2. For unalloyed zirconium and Zircaloy-2 containing up to 500 ppm hydrogen, no time-dependent fracture was observed which could be attributed to the delayed failure phenomenon; an increased grain size or 20% prior reduction by cold rolling did not significantly affect this behavior. The curve of applied stress versus time to failure for the high-strength Zr--Al-Sn-- Mo alloy containing 500 ppm hydrogen indicated susceptibility to time-dependent fracture due to hydrogen absorption. Short-time data for Zr-<2.5Nb>2 in the heat-treated condition and containing 500 ppm hydrogen indicated that this material is insensitive to delayed failure. (auth)

Weinstein, D.; Holtz, F.C.

1962-07-01T23:59:59.000Z

224

Emissions Control Failures in Passenger Cars  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 Emissions Control Failures in Passenger Cars Two measures of car model malfunction probability, fraction of cars over 1% CO (y-axis) and average CO concentration of all cars (x-axis), demonstrate that five 1987-89 car models (14 year-model combinations) have a malfunction probability several times that of all other models. When an automobile's emissions control system fails, it may be because that model is more prone to failure than others, according to a study conducted by the Center's Energy Analysis Program and Marc Ross of the University of Michigan. This finding goes against the conventional wisdom that improper maintenance or deliberate disabling of the emissions systems by car owners is the cause of "high-emitting" vehicles. The results may provide clean-air

225

Crack Growth in Solid Oxide Fuel Cell Materials: From Discrete to Continuum Damage Modeling  

Science Conference Proceedings (OSTI)

This paper addresses the cracking problem of glass and ceramic materials used in solid oxide fuel cells (SOFCs). Analyses of an internal crack and of an interface crack between dissimilar materials were conducted using a modified boundary layer modeling approach. In this approach, fracture is allowed to occur in a small process window situated at an initial crack tip. Elastic displacement crack-tip fields are prescribed as remote boundary conditions. Crack propagation was first modeled discretely. Next, a continuum damage mechanics (CDM) model for brittle materials was developed to capture damage and crack growth in the process window. In particular, the damage model was applied to a glass-ceramic material that had been developed in-house for sealing purposes. Discrete and continuum damage solutions were then compared. Finally, the CDM model was used to determine the crack propagation direction as a function of a mode mixity measure.

Nguyen, Ba Nghiep; Koeppel, Brian J.; Ahzi, Said; Khaleel, Mohammad A.; Singh, Prabhakar

2006-04-01T23:59:59.000Z

226

Cryogenic Material Properties Database Cryogenic Material ...  

Science Conference Proceedings (OSTI)

... properties. These include the Handbook on Materials for Superconducting Machinery and the LNG Materials & Fluids. Neither ...

2000-10-27T23:59:59.000Z

227

Understanding Cascading Failures in Power Grids  

E-Print Network (OSTI)

In the past, we have observed several large blackouts, i.e. loss of power to large areas. It has been noted by several researchers that these large blackouts are a result of a cascade of failures of various components. As a power grid is made up of several thousands or even millions of components (relays, breakers, transformers, etc.), it is quite plausible that a few of these components do not perform their function as desired. Their failure/misbehavior puts additional burden on the working components causing them to misbehave, and thus leading to a cascade of failures. The complexity of the entire power grid makes it difficult to model each and every individual component and study the stability of the entire system. For this reason, it is often the case that abstract models of the working of the power grid are constructed and then analyzed. These models need to be computationally tractable while serving as a reasonable model for the entire system. In this work, we construct one such model for the power grid...

Kadloor, Sachin

2010-01-01T23:59:59.000Z

228

Investigation of Fatigue Failures of Titanium Alloy Blades Used in ...  

Science Conference Proceedings (OSTI)

In this paper we present two failure case-studies of titanium alloy used for aeroderivative gas turbine compressor blades. Both are related to a failure of 1st stage ...

229

Standard guide for corrosion-related failure analysis  

E-Print Network (OSTI)

1.1 This guide covers key issues to be considered when examining metallic failures when corrosion is suspected as either a major or minor causative factor. 1.2 Corrosion-related failures could include one or more of the following: change in surface appearance (for example, tarnish, rust, color change), pin hole leak, catastrophic structural failure (for example, collapse, explosive rupture, implosive rupture, cracking), weld failure, loss of electrical continuity, and loss of functionality (for example, seizure, galling, spalling, swelling). 1.3 Issues covered include overall failure site conditions, operating conditions at the time of failure, history of equipment and its operation, corrosion product sampling, environmental sampling, metallurgical and electrochemical factors, morphology (mode) or failure, and by considering the preceding, deducing the cause(s) of corrosion failure. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibili...

American Society for Testing and Materials. Philadelphia

2000-01-01T23:59:59.000Z

230

Green Materials  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... Incorporation of Granite Waste Diamond Wire in Cementitious Matrices: ... determination method simplex from a stroke cement using standard CP-V, ... its property in building materials manufacture, alumina recovery, etc. ... as well as their changes during heat treatment were studied by XRD, FTIR and XPS.

231

Failure Analysis of Four Graphite Pump Seal Faces  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

232

Understanding Failure of Titanium Alloys Using Fractography and ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

233

High Temperature Failure of Expansion Joints Due to Stress ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

234

Case Studies in Failure Analysis: From Civilian Structures to Dies ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

235

Failure Analysis and Remaining Life Assessment of Methanol ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

236

Charles R. Morin Memorial Symposium on Failure Analysis and ...  

Science Conference Proceedings (OSTI)

Intergranular Cracking of Brass Sprinkler Heads · Investigation of Bottle Related Incidents · Investigation of Catastrophic Failures in High-Power MOSFET ...

237

Failure of Dissimilar Metal Welds at Elevated Temperature  

Science Conference Proceedings (OSTI)

The investigation of the failures included evaluation of nondestructive testing ... Experimental Technique to Conduct Thermal Shock Test on Refractories Using ...

238

PDC IC WELD FAILURE EVALUATION AND RESOLUTION  

Science Conference Proceedings (OSTI)

During final preparations for start of the PDCF Inner Can (IC) qualification effort, welding was performed on an automated weld system known as the PICN. During the initial weld, using a pedigree canister and plug, a weld defect was observed. The defect resulted in a hole in the sidewall of the canister, and it was observed that the plug sidewall had not been consumed. This was a new type of failure not seen during development and production of legacy Bagless Transfer Cans (FB-Line/Hanford). Therefore, a team was assembled to determine the root cause and to determine if the process could be improved. After several brain storming sessions (MS and T, R and D Engineering, PDC Project), an evaluation matrix was established to direct this effort. The matrix identified numerous activities that could be taken and then prioritized those activities. This effort was limited by both time and resources (the number of canisters and plugs available for testing was limited). A discovery process was initiated to evaluate the Vendor's IC fabrication process relative to legacy processes. There were no significant findings, however, some information regarding forging/anneal processes could not be obtained. Evaluations were conducted to compare mechanical properties of the PDC canisters relative to the legacy canisters. Some differences were identified, but mechanical properties were determined to be consistent with legacy materials. A number of process changes were also evaluated. A heat treatment procedure was established that could reduce the magnetic characteristics to levels similar to the legacy materials. An in-situ arc annealing process was developed that resulted in improved weld characteristics for test articles. Also several tack welds configurations were addressed, it was found that increasing the number of tack welds (and changing the sequence) resulted in decreased can to plug gaps and a more stable weld for test articles. Incorporating all of the process improvements for the actual can welding process, however, did not result in an improved weld geometry. Several possibilities for the lack of positive response exist, some of which are that (1) an insufficient number of test articles were welded under prototypic conditions, (2) the process was not optimized so that significant improvements were observable over the 'noise', and (3) the in-situ arc anneal closed the gap down too much so the can was unable to exhaust pressure ahead of the weld. Several operational and mechanical improvements were identified. The weld clamps were changed to a design consistent with those used in the legacy operations. A helium puff operation was eliminated; it is believed that this operation was the cause of the original weld defect. Also, timing of plug mast movement was found to correspond with weld irregularities. The timing of the movement was changed to occur during weld head travel between tacks. In the end a three sequential tack weld process followed by a pulse weld at the same current and travel speed as was used for the legacy processes was suggested for use during the IC qualification effort. Relative to legacy welds, the PDC IC weld demonstrates greater fluctuation in the region of the weld located between tack welds. However, canister weld response (canister to canister) is consistent and with the aid of the optical mapping system (for targeting the cut position) is considered adequate. DR measurements and METs show the PDC IC welds to have sufficient ligament length to ensure adequate canister pressure/impact capacity and to ensure adequate stub function. The PDC welding process has not been optimized as a result of this effort. Differences remain between the legacy BTC welds and the PDC IC weld, but these differences are not sufficient to prevent resumption of the current PDC IC qualification effort. During the PDC IC qualification effort, a total of 17 cans will be welded and a variety of tests/inspections will be performed. The extensive data collected during that qualification effort should be of a sufficient population to determ

Korinko, P.; Howard, S.; Maxwell, D.; Fiscus, J.

2012-04-16T23:59:59.000Z

239

Failure probabilities of steam generator tubes. Annual report  

SciTech Connect

BNL's efforts focused on the following specific items; the probabilities of failure for perfect steam generator tubes, the probabilities of failure for steam generator tubes containing long axisymmetrically thinned sections, and the probabilities of failure for steam generator tubes containing finite length (relatively short) axisymmetric wastages. (auth)

Reich, M.

1975-08-01T23:59:59.000Z

240

Production-run software failure diagnosis via hardware performance counters  

Science Conference Proceedings (OSTI)

Sequential and concurrency bugs are widespread in deployed software. They cause severe failures and huge financial loss during production runs. Tools that diagnose production-run failures with low overhead are needed. The state-of-the-art diagnosis techniques ... Keywords: concurrency bugs, failure diagnosis, performance counters, production run

Joy Arulraj; Po-Chun Chang; Guoliang Jin; Shan Lu

2013-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

PREFAIL: a programmable tool for multiple-failure injection  

Science Conference Proceedings (OSTI)

As hardware failures are no longer rare in the era of cloud computing, cloud software systems must "prevail" against multiple, diverse failures that are likely to occur. Testing software against multiple failures poses the problem of combinatorial explosion ... Keywords: distributed systems, fault injection, testing

Pallavi Joshi; Haryadi S. Gunawi; Koushik Sen

2011-10-01T23:59:59.000Z

242

On Crevecoeur's bathtub-shaped failure rate model  

Science Conference Proceedings (OSTI)

Crevecoeur (1993) developed a three-parameter bathtub-shaped failure rate model that enjoys nice mathematical properties and justification from engineering perspectives. In this paper, we derive the explicit formulas for the maximum likelihood estimation ... Keywords: Bathtub curve, Censoring, Failure rate, Lifetime failure data, Maximum likelihood estimation, Poisson process, Reliability, Repairable system

Junfeng Liu; Yi Wang

2013-01-01T23:59:59.000Z

243

Historical review of plutonium storage container failures at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

As part of the DOE Plutonium Vulnerability Assessment, an investigation was made to characterize the can failures at LLNL. Since the LLNL Plutonium Facility was opened for plutonium operations in 1961, there have only been three can failures that could be remembered by plutonium handlers, vault workers, chemical analysts, and material managers. Only one of these can failures was discovered during the processing of more than 606 packages containing plutonium as part of the LLNL Plutonium Inventory Reduction Program. A very low failure rate, especially since some of the 606 cans had been in storage for two to three decades. Two of the three containers that failed were made of aluminum and were packaged with 1.25 inch diameter plutonium metal spheres. The cans were split down their entire length and the plutonium metal was heavily oxidized. The secondary gallon container of the third package failure was found to be imploded in the storage vault. Upon closer examination, the plastic bags around the inner pint can were badly melted and the lid on the can was loose. Like the other two failures, the metal was heavily oxidized. In all three of the can failures, it is theorized that air entered the inner can through incomplete sealing and the oxygen in the air then reacted with the plutonium metal to produce plutonium oxide. Air was supplied to the inner can by permeation through the surrounding plastic bag. The air could have either diffused through the bag or could have been pumped through the twisted and taped ends of the inner most bag. The inner bags and cans were packaged into second bags and cans in an air atmosphere; therefore, trapping air inside the packaging configuration that could have passed through the bags. A failure of the inner can integrity would be necessary for the air to pass into it. In all three LLNL can failure cases, it is believed that the seal of the inner can was not sufficient to prevent a breach of the can environment.

Dodson, K.E.

1994-05-01T23:59:59.000Z

244

Materials Week '97: Wednesday AM Session - TMS  

Science Conference Proceedings (OSTI)

... THE BRITTLE-TO-DUCTILE TRANSITION: V. Vitek, M. Khantha, D.P. Pope, .... Kharkov, Ukraine; A.A. Krokhin and G.A. Luna-Acosta, Instituto de Fisica de la ...

245

Probability of Failure for Low Alloy Cr-Mo Seam Welded Piping in Fossil Power Plants  

Science Conference Proceedings (OSTI)

Managing longitudinal seam welded piping in fossil fueled power plants is an expensive challenge necessitated by the failures of a few hot reheat and main steam lines. The traditional approach involves inspections during outages that require scaffold erection, insulation removal, surface preparation, and nondestructive evaluation NDE inspection. This report strives to provide utilities with another tool to manage high energy piping systems. It investigates normal distribution of material properties, alon...

2010-12-23T23:59:59.000Z

246

Great Tool or Gold Standard? B-Type Natriuretic Peptide and Congestive Heart Failure  

E-Print Network (OSTI)

department have congestive heart failure? JAMA McKee PA,natural history of congestive heart failure: the Framinghamin diagnosing congestive heart failure in the dyspneic

Montez, Jeremy; Henderson, Sean O

2011-01-01T23:59:59.000Z

247

Probabilistic Failure Analysis for Wound Composite Ceramic Cladding Assembly  

SciTech Connect

Advanced ceramic matrix composites based on silicon carbide (SiC) are being considered as candidate material systems for nuclear fuel cladding in light water reactors. The SiC composite structure is considered due to its assumed exceptional performance under accident scenarios, where its excellent high-temperature strength and slow reaction kinetics with steam and associated mitigated hydrogen production are desirable. The specific structures of interest consist of a monolithic SiC cylinder surrounded by interphase-coated SiC woven fibers in a tubular form and infiltrated with SiC. Additional SiC coatings on the outermost surface of the assembly are also being considered to prevent hydrothermal corrosion of the fibrous structure. The inner monolithic cylinder is expected to provide a hermetic seal to contain fission products under normal conditions. While this approach offers the promise of higher burn-up rates and safer behavior in the case of LOCA events, the reliability of such structures must be demonstrated in advance. Therefore, a probability failure analysis study was performed of such monolithic-composite hybrid structures to determine the feasibility of these design concepts. This analysis will be used to predict the future performance of candidate systems in an effort to determine the feasibility of these design concepts and to make future recommendations regarding materials selection.

Hemrick, James Gordon [ORNL] [ORNL; Lara-Curzio, Edgar [ORNL] [ORNL

2013-01-01T23:59:59.000Z

248

Nuclear fuel elements made from nanophase materials  

SciTech Connect

A nuclear reactor core fuel element is composed of nanophase high temperature materials. An array of the fuel elements in rod form are joined in an open geometry fuel cell that preferably also uses such nanophase materials for the cell structures. The particular high temperature nanophase fuel element material must have the appropriate mechanical characteristics to avoid strain related failure even at high temperatures, in the order of about 3000.degree. F. Preferably, the reactor type is a pressurized or boiling water reactor and the nanophase material is a high temperature ceramic or ceramic composite. Nanophase metals, or nanophase metals with nanophase ceramics in a composite mixture, also have desirable characteristics, although their temperature capability is not as great as with all-ceramic nanophase material. Combinations of conventional or nanophase metals and conventional or nanophase ceramics can be employed as long as there is at least one nanophase material in the composite. The nuclear reactor so constructed has a number of high strength fuel particles, a nanophase structural material for supporting a fuel rod at high temperature, a configuration to allow passive cooling in the event of a primary cooling system failure, an ability to retain a coolable geometry even at high temperatures, an ability to resist generation of hydrogen gas, and a configuration having good nuclear, corrosion, and mechanical characteristics.

Heubeck, Norman B. (Schenectady, NY)

1998-01-01T23:59:59.000Z

249

Nuclear fuel elements made from nanophase materials  

DOE Patents (OSTI)

A nuclear reactor core fuel element is composed of nanophase high temperature materials. An array of the fuel elements in rod form are joined in an open geometry fuel cell that preferably also uses such nanophase materials for the cell structures. The particular high temperature nanophase fuel element material must have the appropriate mechanical characteristics to avoid strain-related failure even at high temperatures, in the order of about 3,000 F. Preferably, the reactor type is a pressurized or boiling water reactor and the nanophase material is a high temperature ceramic or ceramic composite. Nanophase metals, or nanophase metals with nanophase ceramics in a composite mixture, also have desirable characteristics, although their temperature capability is not as great as with all ceramic nanophase material. Combinations of conventional or nanophase metals and conventional or nanophase ceramics can be employed as long as there is at least one nanophase material in the composite. The nuclear reactor so constructed has a number of high strength fuel particles, a nanophase structural material for supporting a fuel rod at high temperature, a configuration to allow passive cooling in the event of a primary cooling system failure, an ability to retain a coolable geometry even at high temperatures, an ability to resist generation of hydrogen gas, and a configuration having good nuclear, corrosion and mechanical characteristics.

Heubeck, Norman B.

1997-12-01T23:59:59.000Z

250

Nuclear fuel elements made from nanophase materials  

DOE Patents (OSTI)

A nuclear reactor core fuel element is composed of nanophase high temperature materials. An array of the fuel elements in rod form are joined in an open geometry fuel cell that preferably also uses such nanophase materials for the cell structures. The particular high temperature nanophase fuel element material must have the appropriate mechanical characteristics to avoid strain related failure even at high temperatures, in the order of about 3000 F. Preferably, the reactor type is a pressurized or boiling water reactor and the nanophase material is a high temperature ceramic or ceramic composite. Nanophase metals, or nanophase metals with nanophase ceramics in a composite mixture, also have desirable characteristics, although their temperature capability is not as great as with all-ceramic nanophase material. Combinations of conventional or nanophase metals and conventional or nanophase ceramics can be employed as long as there is at least one nanophase material in the composite. The nuclear reactor so constructed has a number of high strength fuel particles, a nanophase structural material for supporting a fuel rod at high temperature, a configuration to allow passive cooling in the event of a primary cooling system failure, an ability to retain a coolable geometry even at high temperatures, an ability to resist generation of hydrogen gas, and a configuration having good nuclear, corrosion, and mechanical characteristics. 5 figs.

Heubeck, N.B.

1998-09-08T23:59:59.000Z

251

MSD Molecular Materials - Argonne National Laboratories, Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Molecular Materials Molecular Materials Group carries out synthesis and characterization of novel materials whose unique properties originate at the molecular level. Our...

252

Prospective Assessment of Patterns of Failure After High-Precision Definitive (Chemo)Radiation in Head-and-Neck Squamous Cell Carcinoma  

Science Conference Proceedings (OSTI)

Purpose: To prospectively analyze patterns of failure in patients with head-and-neck squamous cell carcinoma treated with definitive high-precision radiotherapy with a focus on location of failure relative to target volume coverage. Methods and Materials: Sixty patients treated with three-dimensional conformal radiotherapy or intensity-modulated radiation therapy were included. Locoregional failure volume was defined on the planning data set at relapse, and dose received was analyzed by use of dose-volume histograms. Results: Thirteen patients were deemed to have had locoregional failures, of which two did not have any viable tumor on salvage neck dissection, leaving eleven patients with proven persistent or recurrent locoregional disease. Of these, 9 patients had in-field failure, 1 marginal failure, and 1 both in-field and marginal failures. Overall, only 2 of 11 patients (18%) with relapse had any marginal failure. Of the 20 sites of locoregional failure, 15 (75%) were in-field and 5 (25%) marginal. Distant metastases were detected in 3 patients, whereas a second new primary developed in 3 others. With a median follow-up of 26 months (interquartile range, 18-31 months) for surviving patients, the 3-year local control, locoregional control, disease-free survival, and overall survival rates were 75.3%, 74%, 67.2%, and 60.5%, respectively. Conclusions: Locoregional relapse remains the predominant pattern of failure in head-and-neck squamous cell carcinoma treated with high-precision definitive radiotherapy with the majority of failures occurring 'in-field' within the high-dose volume. Marginal failures can occur, particularly in the vicinity of the spared parotid gland. The therapeutic index of high-precision conformal radiotherapy is largely dependent on adequate selection and delineation of target volumes and organs at risk.

Gupta, Tejpal, E-mail: tejpalgupta@rediffmail.co [Department of Radiation Oncology, Advanced Centre for Treatment Research and Education in Cancer/Tata Memorial Hospital, Tata Memorial Centre, Mumbai (India); Jain, Sandeep; Agarwal, Jai Prakash; Ghosh-Laskar, Sarbani; Phurailatpam, Reena; Pai-Shetty, Rajershi; Dinshaw, Ketayun A. [Department of Radiation Oncology, Advanced Centre for Treatment Research and Education in Cancer/Tata Memorial Hospital, Tata Memorial Centre, Mumbai (India)

2011-06-01T23:59:59.000Z

253

CONTAINER MATERIALS, FABRICATION AND ROBUSTNESS  

SciTech Connect

The multi-barrier 3013 container used to package plutonium-bearing materials is robust and thereby highly resistant to identified degradation modes that might cause failure. The only viable degradation mechanisms identified by a panel of technical experts were pressurization within and corrosion of the containers. Evaluations of the container materials and the fabrication processes and resulting residual stresses suggest that the multi-layered containers will mitigate the potential for degradation of the outer container and prevent the release of the container contents to the environment. Additionally, the ongoing surveillance programs and laboratory studies should detect any incipient degradation of containers in the 3013 storage inventory before an outer container is compromised.

Dunn, K.; Louthan, M.; Rawls, G.; Sindelar, R.; Zapp, P.; Mcclard, J.

2009-11-10T23:59:59.000Z

254

Dynamic deformation of advanced materials  

SciTech Connect

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective of this project was to provide high-quality experimental measurements on composite materials and to develop computational models describing the deformation response of these materials. Specifically, the authors studied the influence of strain rate and shock loading on the deformation and fracture response of a 6061-T6 Al-50 vol.% Al{sub 2}O{sub 3} continuous fiber-reinforced composite as a function of composite orientation. The stress-strain response was found to vary substantially as a function of loading orientation with the quasi-static yield changing from nominally 300 MPa transverse to the fibers to {approximately}1,000 MPa parallel to the fibers. Transverse VISAR wave profile and spall measurements revealed a small, well-defined elastic precursor followed by a reasonably sharp shock rise. The failure response of the composite transverse to the fibers, under both uniaxial stress (quasi-static and dynamic) and uniaxial strain loading, displays a protracted but substantial load drop after yield followed by continued degradation in load carrying capacity. Lack of ideal parallel fiber construction leads to systematic bending failure of the alumina fibers through the sample under uniaxial stress and slow spallation kinetics as various fibers fail and pull out of the matrix across the spall plane.

Gray, G.T. III; Johnson, J.N.; Hixson, R.S.; Albert, D.E.; Song, S.

1996-04-01T23:59:59.000Z

255

Alloy materials  

DOE Patents (OSTI)

An alloy that contains at least two metals and can be used as a substrate for a superconductor is disclosed. The alloy can contain an oxide former. The alloy can have a biaxial or cube texture. The substrate can be used in a multilayer superconductor, which can further include one or more buffer layers disposed between the substrate and the superconductor material. The alloys can be made a by process that involves first rolling the alloy then annealing the alloy. A relatively large volume percentage of the alloy can be formed of grains having a biaxial or cube texture.

Hans Thieme, Cornelis Leo (Westborough, MA); Thompson, Elliott D. (Coventry, RI); Fritzemeier, Leslie G. (Acton, MA); Cameron, Robert D. (Franklin, MA); Siegal, Edward J. (Malden, MA)

2002-01-01T23:59:59.000Z

256

Radiochemical evaluation for debris-induced failures  

Science Conference Proceedings (OSTI)

Radiochemical trends and anomalies experienced during cycle 15 of the Haddam Neck nuclear power plant, as a result of > 450 debris-induced fuel rod failures, presented a situation previously unreported in the nuclear industry. These data, along with shutdown and depressurization spiking data, needed to be evaluated against ultrasonic fuel assembly examination results to derive a predictive model, called the xenon pin equivalent (XPE), to be used for cycle 16. During the development of the model, a fission product release mechanism for this particular type of failure needed to be postulated based on cycle 15 data. The predictive model was tested during cycle 16, which presented similar but more subtle radiochemical trends than cycle 15. Several operational events affected the XPE model, including use of degasification and down-power maneuvers. After the cycle 16 shutdown, the XPE model results were reviewed and evaluated against ultrasonic testing results. Although expected to be conservative, this evaluation proved encouraging in that the model performed more accurately than expected. Additionally, these data helped confirm the postulated release mechanism and its contribution to the XPE model.

Goncarovs, G. (Connecticut Yankee Atomic Power Co., Haddam Neck, CT (United States))

1993-06-01T23:59:59.000Z

257

Photovoltaic Materials  

Science Conference Proceedings (OSTI)

The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and

Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

2012-10-15T23:59:59.000Z

258

Functional Materials for Energy | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Storage Fuel Cells Thermoelectrics Separations Materials Catalysis Sensor Materials Polymers and Composites Carbon Fiber Related Research Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science & Discovery | Advanced Materials | Research Areas | Functional Materials for Energy SHARE Functional Materials for Energy The concept of functional materials for energy occupies a very prominent position in ORNL's research and more broadly the scientific research sponsored by DOE's Basic Energy Sciences. These materials facilitate the capture and transformation of energy, the storage of energy or the efficient release and utilization of stored energy. A different kind of

259

Delamination in Thermohyperelastic Plastic IC Packaging Material Due to Thermal Load and Moisture  

Science Conference Proceedings (OSTI)

Lamination failure as “popcorn” form of plastic electronic packages under thermal stress induced by heat mismatch and vapor pressure induced by the moisture during the solder-reflow process is studied. When plastic electronic packages are ... Keywords: popcorn failure, thermohyperelastic material, vapor pressure

Zhigang Li; Xuexia Yang; Xuefeng Shu

2009-04-01T23:59:59.000Z

260

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

ESTABLISHED MATERIALS TECHNOLOGIES ... Specifically, digital resources are available relating to materials for nuclear power, materials sustainability, and  ...

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

BILAM: a composite laminate failure-analysis code using bilinear stress-strain approximations  

DOE Green Energy (OSTI)

The BILAM code which uses constant strain laminate analysis to generate in-plane load/deformation or stress/strain history of composite laminates to the point of laminate failure is described. The program uses bilinear stress-strain curves to model layer stress-strain behavior. Composite laminates are used for flywheels. The use of this computer code will help to develop data on the behavior of fiber composite materials which can be used by flywheel designers. In this program the stress-strain curves are modelled by assuming linear response in axial tension while using bilinear approximations (2 linear segments) for stress-strain response to axial compressive, transverse tensile, transverse compressive and axial shear loadings. It should be noted that the program attempts to empirically simulate the effects of the phenomena which cause nonlinear stress-strain behavior, instead of mathematically modelling the micromechanics involved. This code, therefore, performs a bilinear laminate analysis, and, in conjunction with several user-defined failure interaction criteria, is designed to provide sequential information on all layer failures up to and including the first fiber failure. The modus operandi is described. Code BILAM can be used to: predict the load-deformation/stress-strain behavior of a composite laminate subjected to a given combination of in-plane loads, and make analytical predictions of laminate strength.

McLaughlin, P.V. Jr.; Dasgupta, A.; Chun, Y.W.

1980-10-01T23:59:59.000Z

262

Prediction of failures in C.T.R. systems  

SciTech Connect

The problem of predicting failure rates is becoming more important in C.T.R. engineering because of the large syatems under consideration. A large theta-pinch system will contain thousands of identical components, many of which are barely beyond the development stage and whose failure rates may be fairly high. A typical ''mean time between failure'' calculation assumes all the components in the system are on the flat part of their failure rate curve. This means the early failure components have been eliminated before that particular group of components is installed in the system. Unfortunately, some of the critical components in a large theta-pinch system may not be tested sufficiently to reach the flat part of the failure rate curve because of the time and expense involved. When this occurs, a standard MTBF calculation will have little or no meaning. Since usually only a few types of components determine the failure rate in CTR systems it is possible to compute an analogous quantity, the''expected time to next failure,'' provided the failure distributions of the critical component types are known. A Monte Carlo method for the computation when failures are independent is described and examples are given. (auth)

Boicourt, G.P.

1973-01-01T23:59:59.000Z

263

Information about Materials Properties  

Science Conference Proceedings (OSTI)

Table 6   Examples of materials information required during detail design...identification Material class (metal, plastic, ceramic composite) Material subclass Material industry designation Material product form Material condition designation (temper, heat treatment, etc.) Material specification Material alternative names Material component designations (composite/assembly)...

264

Interfacial phenomena on selected cathode materials  

DOE Green Energy (OSTI)

We have carried out a series of surface studies of selected cathode materials. Instrumental techniques such as Raman microscopy, surface enhanced Raman spectroscopy (SERS), and atomic force microscopy were used to investigate the cathode surfaces. The goal of this study was to identify detrimental processes which occur at the electrode/electrolyte interface and can lead to electrode degradation and failure during cycling and/or storage at elevated temperatures.

Kostecki, Robert; Matsuo, Yoshiaki; McLarnon, Frank

2001-06-22T23:59:59.000Z

265

SOLERAS Photovoltaic Power Systems Project. Interim report: module failure analysis  

Science Conference Proceedings (OSTI)

The results of the failure analysis performed during the past several months on the open circuit modules and the assessment of the feasibility of repairing these modules on site at the Solar Village are reported. Background information as related to the module failures and the effects of such failures on the overall PV field power output are provided. In addition, a plan to continue the monitoring of the rate of failure and analyzing the failure mechanisms is presented. Sandia National Laboratories conducted analyses of various solder joint problems related to the SOLERAS PV modules. Martin Marietta Corporation, the subcontractor for the SOLERAS PVPS project, performed an analysis of the cell interconnect solder joint failure. Their analyses are included in this report.

Huraib, F.S.; Imamura, M.S.; Salim, A.A.; Rao, N.

1984-10-01T23:59:59.000Z

266

Failure testing of active solar energy components  

SciTech Connect

Component and system reliability of active solar energy systems continue to be a major concern of designers, manufacturers, installers, and consumers. Six test loops were constructed and the Solar Energy Research Institute, in Golden, Colorado, to thermally cycle active solar energy system components. Drain valves, check valves, air vents, vacuum breakers, tempering valves, and polybutylene pipe were included in the testing. The test methods and results are discussed in this report. Test results show poor reliability of some of the components and limited performance from others. The results lead to a better understanding of certain failures in the field and present designers with realistic expectations for these components. Recommendations are given to improve component reliability and for further testing.

Farrington, R.B.

1984-07-01T23:59:59.000Z

267

Size-dependent mechanical properties of beta-structures in protein materials  

E-Print Network (OSTI)

Protein materials such as spider silk can be exceptionally strong, and they can stretch tremendously before failure. Notably, silks are made entirely of proteins, which owe their structure and stability to weak molecular ...

Keten, Sinan

2010-01-01T23:59:59.000Z

268

A REVIEW OF SOFTWARE-INDUCED FAILURE EXPERIENCE.  

SciTech Connect

We present a review of software-induced failures in commercial nuclear power plants (NPPs) and in several non-nuclear industries. We discuss the approach used for connecting operational events related to these failures and the insights gained from this review. In particular, we elaborate on insights that can be used to model this kind of failure in a probabilistic risk assessment (PRA) model. We present the conclusions reached in these areas.

CHU, T.L.; MARTINEZ-GURIDI, G.; YUE, M.; LEHNER, J.

2006-09-01T23:59:59.000Z

269

Preventing aneuploidy and the consequences of failure  

E-Print Network (OSTI)

The maintenance and transmission of genetic material is critical for the survival of cells and organisms. Sexually reproducing diploid organisms undergo meiosis to produce haploid gametes, so that the resulting progeny are ...

Prabhu, Vineet R. (Vineet Ranjan)

2009-01-01T23:59:59.000Z

270

Reliability Models for Facility Location: The Expected Failure Cost ...  

E-Print Network (OSTI)

Aug 25, 2003 ... Reliability Models for Facility Location: The Expected Failure Cost Case. Lawrence V. Snyder (larry.snyder ***at*** lehigh.edu) Mark S. Daskin ...

271

Failure Analysis Case Studies from Refinery and Petrochemical Pilot ...  

Science Conference Proceedings (OSTI)

Abstract Scope, A critical step in the development of new refining and petrochemical technologies is ... Failure of Electrical Submersible Pump of Oil Reservoir.

272

Steam Turbine Blade Failure Root Cause Analysis Guide  

Science Conference Proceedings (OSTI)

Steam Turbine Blade Failure Root Cause Analysis Guide is a concise reference written for operators to plan and conduct an investigation into the most probable causes of a steam turbine blade (bucket) failure. The report provides both an overview and step-by-step approach to identifying the damage mechanisms most common to turbine blade failures. It proceeds to show how damage mechanisms are related to the operating history prior to the blades failure and how they are evaluated to establish their role as ...

2008-03-31T23:59:59.000Z

273

186 Wireline Failures in Oil & Gas Wells - Case Studies  

Science Conference Proceedings (OSTI)

Presentation Title, 186 Wireline Failures in Oil & Gas Wells - Case Studies ..... 202 Microstructure Exploration of High Strength High Ductility Iron-Based Glassy

274

Analysis of High-Collapse Grade P110 Coupling Failures  

Science Conference Proceedings (OSTI)

These failures have typically occurred during fracturing operations, when the couplings are subjected to particularly high hoop stresses, and have cumulatively  ...

275

173 Failure Analysis and Improvement of Low Temperature Impact ...  

Science Conference Proceedings (OSTI)

Results indicates that foreign non-metallic inclusions and central microsegregation of the plate are ..... 186 Wireline Failures in Oil & Gas Wells - Case Studies.

276

Failure Analysis and Electrochemical Testing of Grayloc Type ...  

Science Conference Proceedings (OSTI)

... a Failure Mechanism in the Absence of Physical Evidence · “High-Temperature Stress Relaxation Cracking and Stress Rupture Observed in a Coke Gasifier” ...

277

Using Handheld XRF for On-site Failure Analysis  

Science Conference Proceedings (OSTI)

Splitting Tension Test on High-Strength Concretes Studied by Artificial Intelligence and Response Surface Analysis · Spring Failures -The Role of Corrosion in ...

278

Wind Turbine Gearbox Failure Modes - A Brief (Presentation)  

DOE Green Energy (OSTI)

Wind turbine gearboxes are not always meeting 20-year design life. Premature failure of gearboxes increases cost of energy, turbine downtime, unplanned maintenance, gearbox replacement and rebuild, and increased warranty reserves. The problem is widespread, affects most Original Equipment Manufacturers, and is not caused by manufacturing practices. There is a need to improve gearbox reliability and reduce turbine downtime. The topics of this presentation are: GRC (Gearbox Reliability Collaborative) technical approach; Gearbox failure database; Recorded incidents summary; Top failure modes for bearings; Top failure modes for gears; GRC test gearbox; Bearing nomenclature; Test history; Real damage; Gear sets; Bearings; Observations; and Summary. 5 refs.

Sheng, S.; McDade, M.; Errichello, R.

2011-10-01T23:59:59.000Z

279

DPQ Event Cracked Bushing Leads to Transformer Bank Failure  

Science Conference Proceedings (OSTI)

As part of EPRI's distribution power quality (DPQ) project this power quality (PQ) case study investigates cracked bushing recorded by PQ monitors that led to tranformer bank failure.

2003-12-31T23:59:59.000Z

280

Failure Analysis of Joining Mechanisms - Programmaster.org  

Science Conference Proceedings (OSTI)

Methodology applied Reliability-Centered Maintenance (RCM-II) root-failure cause ... Seven broken stud bolts from two isolation valves in an offshore platform  ...

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Materials Science Evaluation Portal  

Science Conference Proceedings (OSTI)

NIST Home > Materials Science Evaluation Portal. Materials Science Evaluation Portal. Subject Areas. Modeling; Nondestructive; ...

2013-08-08T23:59:59.000Z

282

Materials Performance Staff  

Science Conference Proceedings (OSTI)

... Kinetics Staff; Materials Science and Engineering Division Staff Directory; MML Organization. Contact. Materials Performance ...

2013-08-20T23:59:59.000Z

283

Impact of Fuel Failure on Criticality Safety of Used Nuclear Fuel  

SciTech Connect

Commercial used nuclear fuel (UNF) in the United States is expected to remain in storage for considerably longer periods than originally intended (e.g., <40 years). Extended storage (ES) time and irradiation of nuclear fuel to high-burnup values (>45 GWd/t) may increase the potential for fuel failure during normal and accident conditions involving storage and transportation. Fuel failure, depending on the severity, can result in changes to the geometric configuration of the fuel, which has safety and regulatory implications. The likelihood and extent of fuel reconfiguration and its impact on the safety of the UNF is not well understood. The objective of this work is to assess and quantify the impact of fuel reconfiguration due to fuel failure on criticality safety of UNF in storage and transportation casks. This effort is primarily motivated by concerns related to the potential for fuel degradation during ES periods and transportation following ES. The criticality analyses consider representative UNF designs and cask systems and a range of fuel enrichments, burnups, and cooling times. The various failed-fuel configurations considered are designed to bound the anticipated effects of individual rod and general cladding failure, fuel rod deformation, loss of neutron absorber materials, degradation of canister internals, and gross assembly failure. The results quantify the potential impact on criticality safety associated with fuel reconfiguration and may be used to guide future research, design, and regulatory activities. Although it can be concluded that the criticality safety impacts of fuel reconfiguration during transportation subsequent to ES are manageable, the results indicate that certain configurations can result in a large increase in the effective neutron multiplication factor, k{sub eff}. Future work to inform decision making relative to which configurations are credible, and therefore need to be considered in a safety evaluation, is recommended.

Marshall, William BJ J [ORNL; Wagner, John C [ORNL

2012-01-01T23:59:59.000Z

284

Gas storage materials, including hydrogen storage materials  

DOE Patents (OSTI)

A material for the storage and release of gases comprises a plurality of hollow elements, each hollow element comprising a porous wall enclosing an interior cavity, the interior cavity including structures of a solid-state storage material. In particular examples, the storage material is a hydrogen storage material such as a solid state hydride. An improved method for forming such materials includes the solution diffusion of a storage material solution through a porous wall of a hollow element into an interior cavity.

Mohtadi, Rana F; Wicks, George G; Heung, Leung K; Nakamura, Kenji

2013-02-19T23:59:59.000Z

285

Functional Materials for Energy | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Storage Fuel Cells Thermoelectrics Separations Materials Catalysis Sensor Materials Polymers and Composites Carbon Fiber Related Research Chemistry and Physics at...

286

Materials Science & Tech Division | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

accident tolerant fuels, and providing the materials underpinning for fusion energy. The nuclear materials program leverages off both fundamental and applied capabilities within...

287

Sandia National Labs: Materials Science & Engineering, Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

MATERIALS SCIENCE & ENGINEERING HOME OrganizationMission Capabilities Awards & Accomplishments Patents MATERIALS SCIENCE AND ENGINEERING CENTER Techniques 1 2 3 4 5 6 7 These are...

288

Failure Time Remapping in Compound Aftershock Sequences Susanna Gross  

E-Print Network (OSTI)

earthquakes nucleate through a failure process such as velocity dependent friction or stress corrosion of accelerating slip, growing cracks, or any similar failure process, then the rate of decay of aftershock cracking. Introduction One of the most interesting seismic phenomena is the occurrence of aftershocks

Gross, Susanna

289

Kaizen and Stochastic Networks Support the Investigation of Aircraft Failures  

Science Conference Proceedings (OSTI)

Investigating the causes of aircraft failures and preventing their reoccurrence are crucial to achieving and maintaining a high flight safety level; technical failure-analysis teams usually perform these functions. We developed and applied a dual-phased ... Keywords: applications, engineering, graphs, networks, queues, simulation

Izack Cohen

2010-05-01T23:59:59.000Z

290

Failure Analysis of Digital Instrumentation and Control Equipment and Systems  

Science Conference Proceedings (OSTI)

This interim report documents an investigation of digital system failure analysis techniques that may be of use in improving the effectiveness and efficiency of currently applied techniques. The study considered both top-down approaches, such as fault tree analysis, and bottom-up approaches, such as failure modes and effects analysis (FMEA), applying them to realistic examples to assess their potential value.

2011-12-21T23:59:59.000Z

291

APPLICATION OF ENERGY METHODS TO MODELING FAILURES IN COMPOSITE MATERIALS AND STRUCTURES  

E-Print Network (OSTI)

scheme, known as the building block approach in MIL HDBK 17 [8], while figure 4 is a specific set, wind turbine blades, etc. Current Scale Up Approach For Composites Figure 3. MIL HDBK 17 Building Block

292

An innovative method of providing total breaker failure protection  

Science Conference Proceedings (OSTI)

Breaker failure relaying has been generally achieved through the use of a current monitoring relay to determine whether current continues to flow into a fault after a breaker has been instructed to interrupt the circuit. If current continues to flow after a predefined period of time, the circuit breaker is considered to have failed. Steps must then be taken to trip the next set of upstream breakers in the power system to remove the faulted circuit and prevent system damage. However, with industrial power systems, this may be the utility`s breakers on the feeding transmission line. Regardless, breaker failure schemes must be designed to isolate both the faulted circuit and the failed circuit breaker. This paper discusses a new and innovative method of protecting a circuit breaker from the failure described above, plus other failures that go unprotected with conventional schemes, this providing total breaker failure protection.

Stringer, N.T.; Waser, D. [Basler Electric Co., Highland, IL (United States)

1996-09-01T23:59:59.000Z

293

Materials Project: A Materials Genome Approach  

DOE Data Explorer (OSTI)

Technological innovation - faster computers, more efficient solar cells, more compact energy storage - is often enabled by materials advances. Yet, it takes an average of 18 years to move new materials discoveries from lab to market. This is largely because materials designers operate with very little information and must painstakingly tweak new materials in the lab. Computational materials science is now powerful enough that it can predict many properties of materials before those materials are ever synthesized in the lab. By scaling materials computations over supercomputing clusters, this project has computed some properties of over 80,000 materials and screened 25,000 of these for Li-ion batteries. The computations predicted several new battery materials which were made and tested in the lab and are now being patented. By computing properties of all known materials, the Materials Project aims to remove guesswork from materials design in a variety of applications. Experimental research can be targeted to the most promising compounds from computational data sets. Researchers will be able to data-mine scientific trends in materials properties. By providing materials researchers with the information they need to design better, the Materials Project aims to accelerate innovation in materials research.[copied from http://materialsproject.org/about] You will be asked to register to be granted free, full access.

Ceder, Gerbrand [MIT; Persson, Kristin [LBNL

294

Analyzing Failures in the Nuclear Industry  

Science Conference Proceedings (OSTI)

Oct 26, 2009 ... The evolution of Westinghouse AP 1000 Nuclear Power Plant design is based on ... Mechanisms of degradation considered will include environmentally induced, ... detection and effective aging management capability will be discussed. ... The packaged materials are stored in secure facilities and regular ...

295

Materials Under Extremes | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Defect Physics Lightweight Related Research Functional Materials for Energy Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems...

296

NETL: Advanced Research - Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance Materials High Temperature Materials The environment inside a slagging gasifier is one of the worst imaginable from a materials standpoint. Another extreme...

297

Nuclear Materials Committee  

Science Conference Proceedings (OSTI)

The Nuclear Materials Committee is part of the Structural Materials Division. Our Mission: Includes the scientific and technical aspects of materials which are ...

298

GRAIN-SCALE FAILURE IN THERMAL SPALLATION DRILLING  

DOE Green Energy (OSTI)

Geothermal power promises clean, renewable, reliable and potentially widely-available energy, but is limited by high initial capital costs. New drilling technologies are required to make geothermal power financially competitive with other energy sources. One potential solution is offered by Thermal Spallation Drilling (TSD) - a novel drilling technique in which small particles (spalls) are released from the rock surface by rapid heating. While TSD has the potential to improve drilling rates of brittle granitic rocks, the coupled thermomechanical processes involved in TSD are poorly described, making system control and optimization difficult for this drilling technology. In this paper, we discuss results from a new modeling effort investigating thermal spallation drilling. In particular, we describe an explicit model that simulates the grain-scale mechanics of thermal spallation and use this model to examine existing theories concerning spalling mechanisms. We will report how borehole conditions influence spall production, and discuss implications for macro-scale models of drilling systems.

Walsh, S C; Lomov, I; Roberts, J J

2012-01-19T23:59:59.000Z

299

Proceedings: International Conference on Boiler Tube Failures and Heat Recovery Steam Generator (HRSG) Tube Failures and Inspections  

SciTech Connect

Tube failures remain the leading cause of availability loss in conventional fossil plants and combined cycle/heat recovery steam generator (HRSG) plants. These conference proceedings address state-of-the-art practices and techniques worldwide for understanding and reducing tube failures.

None

2002-10-01T23:59:59.000Z

300

Capacitor and Dielectric Materials  

Science Conference Proceedings (OSTI)

Sponsored by: TMS: Energy Conversion and Storage Committee, TMS: Magnetic ... a large and detrimental contribution to system volume, weight, and cost. ... on increase of leakage currents under high bias prior to time dependent failure.

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Geothermal materials studies. Quarterly report, July--September 1976  

DOE Green Energy (OSTI)

Results are reported on the following subjects: erosion studies of nozzle and turbine materials, stress corrosion cracking experiments on Ti-, Fe-, Ni-, and Co-base alloys; general corrosion field tests; evaluation of corrosion and erosion failure, corrosion testing, and electroless nickel plating of a turbine wheel. (MHR)

Goldberg, A.

1976-09-01T23:59:59.000Z

302

Fast recovery from dual-link or single-node failures in IP networks using tunneling  

Science Conference Proceedings (OSTI)

This paper develops novel mechanisms for recovering from failures in IP networks with proactive backup path calculations and Internet Protocol (IP) tunneling. The primary scheme provides resilience for up to two link failures along a path. The highlight ... Keywords: IP fast reroute, failure recovery, independent trees, multiple-link failure, network protection, node failure

Shrinivasa Kini; Srinivasan Ramasubramanian; Amund Kvalbein; Audun Fosselie Hansen

2010-12-01T23:59:59.000Z

303

Circuit breaker operation and potential failure modes during an earthquake  

Science Conference Proceedings (OSTI)

This study addresses the effect of a strong-motion earthquake on circuit breaker operation. It focuses on the loss of offsite power (LOSP) transient caused by a strong-motion earthquake at the Zion Nuclear Power Plant. This paper also describes the operator action necessary to prevent core melt if the above circuit breaker failure modes occur simultaneously on three 4.16 KV buses. Numerous circuit breakers important to plant safety, such as circuit breakers to diesel generators and engineered safety systems (ESS), must open and/or close during this transient while strong motion is occurring. Potential seismically-induced circuit-breaker failures modes were uncovered while the study was conducted. These failure modes include: circuit breaker fails to close; circuit breaker trips inadvertently; circuit breaker fails to reclose after trip. The causes of these failure modes include: Relay chatter causes the circuit breaker to trip; Relay chatter causes anti-pumping relays to seal-in which prevents automatic closure of circuit breakers; Load sequencer failures. The incorporation of these failure modes as well as other instrumentation and control failures into a limited scope seismic probabilistic risk assessment is also discussed in this paper.

Lambert, H.E.; Budnitz, R.J.

1987-01-01T23:59:59.000Z

304

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

May 28, 2012 ... Administrative & Policy Manual .... Materials and Society: Energy Technology, Policy, and Education; Materials Processing and Production; and ...

305

Magnetic Materials Staff  

Science Conference Proceedings (OSTI)

... Materials Science and Engineering Division Staff Directory; MML Organization. Contact. Magnetic Materials Group Robert Shull, Group Leader. ...

2012-10-09T23:59:59.000Z

306

Anisotropic Curie Temperature Materials  

Science Conference Proceedings (OSTI)

Symposium, Magnetic Materials for Energy Applications -III. Presentation Title, Anisotropic Curie Temperature Materials. Author(s), Harsh Deep Chopra, Jason ...

307

Material Properties References  

Science Conference Proceedings (OSTI)

... Thermal Conductivity. LNG Materials and Fluids. Ed. ... Aluminum 3003. Linear thermal expansion. LNG Materials and Fluids. Ed. ...

2013-02-05T23:59:59.000Z

308

emerging materials - TMS  

Science Conference Proceedings (OSTI)

…plenary discussion. Energy and Security; Nuclear Materials; Fuel Cells; Materials for Alternative Energy Applications. Advanced Metallic Composites and  ...

309

Bioinspired Materials Engineering  

Science Conference Proceedings (OSTI)

Conference Tools for Materials Science & Technology 2014 ... structured functional materials with improved and designed (piezo )electrical, magnetic, optical, ...

310

Multiscale Modeling of Materials  

Science Conference Proceedings (OSTI)

Oct 27, 2009 ... Parametric materials design integrating materials science, applied mechanics and quantum physics within a systems engineering framework ...

311

Radiation Shields Materials  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2009. Symposium, Materials Solutions for the Nuclear Renaissance. Presentation Title, Radiation ...

312

Nanomechanical Materials Behavior Committee  

Science Conference Proceedings (OSTI)

The Nanomechanical Materials Behavior Committee is part of the Materials Processing & Manufacturing Division;. Our Mission: Focuses on the nanomechanical ...

313

Experience with CPV Module Failures at NREL (Presentation)  

DOE Green Energy (OSTI)

The failures and performance issues associated with three years of on-sun testing of CPV modules are discussed. Pictures of various failure mechanisms and performance issues are presented. A wide array of CPV module failures and performance issues have been experienced at NREL. Many of the modules are prototypes and have not been through qualification testing. It is assumed that the qualification test would have captured many of the problems. Internal lens soiling due to condensation is not currently captured by the qualification test. Lens temperature dependence can be built into modeling if CPV is to operate in cold locations.

Muller, M.

2012-03-01T23:59:59.000Z

314

Method for forming materials  

DOE Patents (OSTI)

A material-forming tool and a method for forming a material are described including a shank portion; a shoulder portion that releasably engages the shank portion; a pin that releasably engages the shoulder portion, wherein the pin defines a passageway; and a source of a material coupled in material flowing relation relative to the pin and wherein the material-forming tool is utilized in methodology that includes providing a first material; providing a second material, and placing the second material into contact with the first material; and locally plastically deforming the first material with the material-forming tool so as mix the first material and second material together to form a resulting material having characteristics different from the respective first and second materials.

Tolle, Charles R. (Idaho Falls, ID); Clark, Denis E. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Miller, Karen S. (Idaho Falls, ID)

2009-10-06T23:59:59.000Z

315

Materials Informatics: Fast Track to New Materials  

SciTech Connect

Current methods for new materials development focus on either deeper fundamental-level studies or generation of large quantities of data. The data challenge in materials science is not only the volume of data being generated by many independent investigators, but its heterogeneity and also its complexity that must be transformed, analyzed, correlated and communicated. Materials informatics addresses these issues. Materials informatics is an emerging information-based field combining computational, statistical, and mathematical approaches with materials sciences for accelerating discovery and development of new materials. Within the informatic framework, the various different forms of information form a system architecture, an iterative cycle for transforming data into knowledge.

Ferris, Kim F.; Peurrung, Loni M.; Marder, James M.

2007-01-01T23:59:59.000Z

316

Cystatin-C and mortality in elderly persons with heart failure  

E-Print Network (OSTI)

Cystatin-C and mortality in heart failure Cystatin-C andin elderly persons with heart failure Michael G. Shlipak,digoxin therapy and heart failure outcomes - evidence from

2005-01-01T23:59:59.000Z

317

Dynamic Fault-Tolerance and Metrics for Battery Powered, Failure-Prone Systems  

Science Conference Proceedings (OSTI)

Emerging VLSI technologies and platforms are giving rise tosystems with inherently high potential for runtime failure.Such failures range from intermittent electrical and mechanicalfailures at the system level, to device failures at the chip level.Techniques ...

Phillip Stanley-Marbell; Diana Marculescu

2003-11-01T23:59:59.000Z

318

NEWTON's Material Science References  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science References Material Science References Do you have a great material science reference link? Please click our Ideas page. Featured Reference Links: Materials Research Society Materials Research Society The Materials Research Society has assembled many resources in its Materials Science Enthusiasts site. This site has information for the K-12 audience, general public, and materials science professionals. Material Science nanoHUB nanHUB.org is the place for nanotechnology research, education, and collaboration. There are Simulation Programs, Online Presentations, Courses, Learning Modules, Podcasts, Animations, Teaching Materials, and more. (Intened for high school and up) Materials Science Resources on the Web Materials Science Resources on the Web This site gives a good general introduction into material science. Sponsered by Iowa State, it talks about what material science is, ceramics and composites, and other topics.

319

Hybrid approach to failure prediction for advanced computing systems |  

NLE Websites -- All DOE Office Websites (Extended Search)

Hybrid approach to failure prediction for advanced computing systems Hybrid approach to failure prediction for advanced computing systems January 8, 2014 Tweet EmailPrint "Fault tolerance is no longer an option but a necessity," states Franck Cappello, project manager of research on resilience at the extreme scale at Argonne National Laboratory. "And the ability to reliably predict failures can significantly reduce the overhead of fault-tolerance strategies and the recovery cost." In a special issue article in the International Journal of High Performance Computing Applications, Cappello and his colleagues at Argonne and the University of Illinois at Urbana-Champaign (UIUC) discuss issues in failure prediction and present a new hybrid approach to overcome the limitations of current models. One popular way of building prediction models is to analyze log files,

320

Randomization can be a healer: consensus with dynamic omission failures  

Science Conference Proceedings (OSTI)

Wireless ad-hoc networks are being increasingly used in diverse contexts, ranging from casual meetings to disaster recovery operations. A promising approach is to model these networks as distributed systems prone to dynamic communication failures. This ...

Henrique Moniz; Nuno Ferreira Neves; Miguel Correia; Paulo Veríssimo

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Recovery tasks: an automated approach to failure recovery  

Science Conference Proceedings (OSTI)

We present a new approach for developing robust software applications that breaks dependences on the failed parts of an application's execution to allow the rest of the application to continue executing. When a failure occurs, the recovery algorithm ...

Brian Demsky; Jin Zhou; William Montaz

2010-11-01T23:59:59.000Z

322

Selection of minimum earthquake intensity in calculating pipe failure probabilities  

SciTech Connect

In a piping reliability analysis, it is sometimes necessary to specify a minimum ground motion intensity, usually the peak acceleration, below which the ground motions are not considered as earthquakes and, hence, are neglected. The calculated probability of failure of a piping system is dependent on this selected minimum earthquake intensity chosen for the analysis. A study was conducted to determine the effects of the minimum earthquake intensity on the probability of pipe failure. The results indicated that the probability of failure of the piping system is not very sensitive to the variations of the selected minimum peak ground acceleration. However, it does have significant effects on various scenarios that make up the system failure.

Lo, T.Y.

1985-01-01T23:59:59.000Z

323

Performance of wireless sensor networks under random node failures  

SciTech Connect

Networks are essential to the function of a modern society and the consequence of damages to a network can be large. Assessing network performance of a damaged network is an important step in network recovery and network design. Connectivity, distance between nodes, and alternative routes are some of the key indicators to network performance. In this paper, random geometric graph (RGG) is used with two types of node failure, uniform failure and localized failure. Since the network performance are multi-facet and assessment can be time constrained, we introduce four measures, which can be computed in polynomial time, to estimate performance of damaged RGG. Simulation experiments are conducted to investigate the deterioration of networks through a period of time. With the empirical results, the performance measures are analyzed and compared to provide understanding of different failure scenarios in a RGG.

Bradonjic, Milan [Los Alamos National Laboratory; Hagberg, Aric [Los Alamos National Laboratory; Feng, Pan [Los Alamos National Laboratory

2011-01-28T23:59:59.000Z

324

Schools - Electronic Equipment Failures Due to Electrical Storms  

Science Conference Proceedings (OSTI)

This power quality (PQ) case study presents the investigation of multiple failures of electronic equipment such as computers, telephones, and alarm sensors throughout a school system, usually as a result of electrical storms.

2003-12-31T23:59:59.000Z

325

Enhancing Availability and Security Through Failure-Oblivious Computing  

E-Print Network (OSTI)

We present a new technique, failure-oblivious computing,that enables programs to continue to execute through memoryerrors without memory corruption. Our safe compilerfor C inserts checks that dynamically detect invalid ...

Rinard, Martin

2004-02-06T23:59:59.000Z

326

Failure Modes and Effects Analysis (FMEA) - A Bibliography  

Science Conference Proceedings (OSTI)

Failure modes and effects analysis (FEMA) is a bottom-up analytical process that identifies process hazards, which helps managers understand vulnerabilities of systems, as well as assess and mitigate risk. It is one of several engineering tools and techniques ...

Program NASA Scientific and Technical Information

2000-07-01T23:59:59.000Z

327

Failure of Electrical Submersible Pump of Oil Reservoir  

Science Conference Proceedings (OSTI)

The annulus reservoir oil with fine rocks leaked into the electric part of the pump motor and caused the power failure. The dissipated heat from the motor to the ...

328

Terrestrial Photovoltaic Module Accelerated Test-To-Failure Protocol  

SciTech Connect

This technical report documents a test-to-failure protocol that may be used to obtain quantitative information about the reliability of photovoltaic modules using accelerated testing in environmental temperature-humidity chambers.

Osterwald, C. R.

2008-03-01T23:59:59.000Z

329

Failure Mode and Sensitivity Analysis of Gas Lift Valves  

E-Print Network (OSTI)

Gas-lifted oil wells are susceptible to failure through malfunction of gas lift valves. This is a growing concern as offshore wells are drilled thousands of meters below the ocean floor in extreme temperature and pressure ...

Gilbertson, Eric W.

330

Transport and Failure in Li-ion Batteries | Stanford Synchrotron...  

NLE Websites -- All DOE Office Websites (Extended Search)

Transport and Failure in Li-ion Batteries Monday, February 13, 2012 - 1:30pm SSRL Conference Room 137-322 Stephen J. Harris, General Motors R&D While battery performance is well...

331

Rheology of Discrete Failure Regimes of Anisotropic Sea Ice  

Science Conference Proceedings (OSTI)

A rheological model of sea ice is presented that incorporates the orientational distribution of ice thickness in leads embedded in isotropic floe ice. Sea ice internal stress is determined by coulombic, ridging and tensile failure at orientations ...

Alexander V. Wilchinsky; Daniel L. Feltham

2012-07-01T23:59:59.000Z

332

Summary of Failure Analyses Activities at Brookhaven National ...  

Science Conference Proceedings (OSTI)

... cause analyses have included radioactive and non-radioactive components from ... An Analysis of a Premature Fatigue Failure of an Acid Bath Mixer's Shaft under ... Stress Concentrators and Corrosion Fatigue : Root Causes and Solutions.

333

Failure recovery: when the cure is worse than the disease  

Science Conference Proceedings (OSTI)

Cloud services inevitably fail: machines lose power, networks become disconnected, pesky software bugs cause sporadic crashes, and so on. Unfortunately, failure recovery itself is often faulty; e.g. recovery can accidentally recursively replicate small ...

Zhenyu Guo, Sean McDirmid, Mao Yang, Li Zhuang, Pu Zhang, Yingwei Luo, Tom Bergan, Peter Bodik, Madan Musuvathi, Zheng Zhang, Lidong Zhou

2013-05-01T23:59:59.000Z

334

Congestive heart failure: treat the disease, not the symptom: return to normalcy/Part II--the experimental approach.  

E-Print Network (OSTI)

Number: Title: Congestive heart failure: treat the diseaseinvited) TITLE: Congestive heart failure: treat the diseasetreatment of congestive heart failure due to post-infarction

Buckberg, Gerald D

2007-01-01T23:59:59.000Z

335

Assessment of Browns Ferry 2 Cycle 12 Fuel Corrosion Failures  

Science Conference Proceedings (OSTI)

Boiling water reactor (BWR) fuel rods from 63 bundles of the Reload 10 GE13 (9x9) design developed leaks during Cycle 12 at Browns Ferry 2 (BF-2). Corrosion failures also occurred in Browns Ferry 3 (BF-3) and Vermont Yankee (VY) in a similar time frame. These fuel failures were investigated in the spent fuel pool and in two separate hot cell examination campaigns. This report compiles and assesses the significant findings of the root cause investigation.

2011-11-30T23:59:59.000Z

336

Field Guide: Heat Recovery Steam Generator Tube Failure  

Science Conference Proceedings (OSTI)

In conventional and combined-cycle plants, boiler and heat recovery steam generator (HRSG) tube failures have been the main availability problem for as long as reliable statistics have been kept for each generating source. The three volumes of the Electric Power Research Institute (EPRI) report Boiler and Heat Recovery Steam Generator Tube Failures: Theory and Practice (1012757) present an in-depth description of the various HRSG and degradation mechanisms, providing plant owners and operators with the t...

2010-12-15T23:59:59.000Z

337

On-clip high frequency reliability and failure test structures  

DOE Patents (OSTI)

Self-stressing test structures for realistic high frequency reliability characterizations. An on-chip high frequency oscillator, controlled by DC signals from off-chip, provides a range of high frequency pulses to test structures. The test structures provide information with regard to a variety of reliability failure mechanisms, including hot-carriers, electromigration, and oxide breakdown. The system is normally integrated at the wafer level to predict the failure mechanisms of the production integrated circuits on the same wafer. 22 figs.

Snyder, E.S.; Campbell, D.V.

1997-04-29T23:59:59.000Z

338

On-clip high frequency reliability and failure test structures  

DOE Patents (OSTI)

Self-stressing test structures for realistic high frequency reliability characterizations. An on-chip high frequency oscillator, controlled by DC signals from off-chip, provides a range of high frequency pulses to test structures. The test structures provide information with regard to a variety of reliability failure mechanisms, including hot-carriers, electromigration, and oxide breakdown. The system is normally integrated at the wafer level to predict the failure mechanisms of the production integrated circuits on the same wafer.

Snyder, Eric S. (Albuquerque, NM); Campbell, David V. (Albuquerque, NM)

1997-01-01T23:59:59.000Z

339

Localization and activation of CaMKII delta isoforms and their involvement in heart failure  

E-Print Network (OSTI)

hypertrophy and heart failure ..CaMKII mediated hypertrophy and heart failure .. I.F.II.C. Preparation of heart tissue extract and cell lysate

Mishra, Shikha

2010-01-01T23:59:59.000Z

340

Systemic Inflammatory Response Syndrome Predicts Mortality in Acute Coronary Syndrome without Congestive Heart Failure  

E-Print Network (OSTI)

on hospitalized acute heart failure patients: description ofpopulation. Eur Heart J 2006;27:2725-36. 13. Steg PG,and prognostic impact of heart failure complicating acute

Fosco, Matías José; Ceretti, Victoria; Agranatti, Daniel

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Case Study; A Failure Analysis of a Pinion Thrust Runner Shaft  

Science Conference Proceedings (OSTI)

Symposium, Charles R. Morin Memorial Symposium on Failure Analysis and ... Tools for Failure Event Database Management and Probability Risk Analysis for ...

342

Educational Material Science Games  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science Games Material Science Games Do you have a great material science game? Please click our Ideas page. Featured Games: >KS2 Bitsize BBC - Materials KS2 Bitsize BBC - Materials Sponsored by the BBC, K2S Bitsize offers tons of free online science games including a section on materials. Learn about the changes in materials, changing states, heat, rocks, soils, solids, liquids, gases, and much more. Science Kids - Properties of Materials Science Kids - Properties of Materials Learn about the properties of materials as you experiment with a variety of objects in this great science activity for kids. Discover the interesting characteristics of materials; are they flexible, waterproof, strong or transparent? Characteristics of Materials - BBC Schools Characteristics of Materials - BBC Schools

343

An Experimental Study of Deformation and Fracture of a Nanostructured Metallic Material  

E-Print Network (OSTI)

The mechanical properties of materials strongly depend on their microstructure. Therefore, engineering the material's microstructure can lead to improving its mechanical properties. One method for enhancing the strength of metallic materials consists of refining the grain size down to the nanometer scale. Such nanostructured materials possess remarkable strength without using conventional metallurgical strengthening methods. However, this strength often comes at the expense of workhardening capacity, thus favoring flow localization and loss of ductility and toughness. The deformation behavior of nanostructured metallic materials has been extensively studied in the literature. However, little is known of their fracture behavior. In this study, the mechanical behavior of a nanostructured, nearly pure material is investigated in order to link processing conditions, microstructure, and fracture locus in stress space. With focus laid on BCC materials which can undergo a ductile-to-brittle transition, Interstitial- Free (IF) steel is chosen. The microstructure is refined using Severe Plastic Deformation (SPD) to achieve ultra-fine grain (UFG) materials with grain sizes in the range 100nm- 1 mu m. Equal Channel Angular Extrusion (ECAE) is used to obtain three types of UFG-IF steel microstructures by varying the extrusion rate and processing temperature. The deformation behavior is investigated for the three UFG materials using round smooth bars and is compared with the behavior of the as-received material. The damage behavior and the fracture mechanisms are studied using tensile round notched bars with varying notch radii. The findings indicate a remarkable combination of strength and notch ductility at room temperature, including for the material with the finest microstructure. They also point to the need for careful characterization of temperature effects before such materials can be considered in structural applications.

Abdel Al, Nisrin Rizek

2009-12-01T23:59:59.000Z

344

Materials characterization center workshop on corrosion of engineered barriers  

DOE Green Energy (OSTI)

A workshop on corrosion test procedures for materials to be used as barriers in nuclear waste repositories was conducted August 19 and 20, 1980, at the Battelle Seattle Research Center. The purpose of the meeting was to obtain guidance for the Materials Characterization Center in preparing test procedures to be approved by the Materials Review Board. The workshop identified test procedures that address failure modes of uniform corrosion, pitting and crevice corrosion, stress corrosion, and hydrogen effects that can cause delayed failures. The principal areas that will require further consideration beyond current engineering practices involve the analyses of pitting, crevice corrosion, and stress corrosion, especially with respect to quantitative predictions of the lifetime of barriers. Special techniques involving accelerated corrosion testing for uniform attack will require development.

Merz, M.D.; Zima, G.E.; Jones, R.H.; Westerman, R.E.

1981-03-01T23:59:59.000Z

345

Grindability determination of torrefied biomass materials using the Hybrid Work index  

Science Conference Proceedings (OSTI)

The grindability of torrefied biomass materials is a difficult parameter to evaluate due to its inhomogeneous character and non-uniform morphology. However, it is necessary to develop a grinding test that is representative of the wide ranging character of biomass and torrefied biomass materials. Previous research has shown that Resistance to Impact Milling (RIM) can be linearly correlated to thermally driven weight loss in biomass. In particular, the RIM equipment was found to supply the right energy level to physically break down structurally deficient biomass materials while leaving the un-touched material relatively intact [1–3]. However, the RIM procedure was not designed to extract the comminution energy. Alternatively, the Bond Work Index (BWI) procedure was developed to accurately assess the grinding energy of brittle materials [4,5]. However, the milling energy is too low to be effective for biomass comminution. In this research, the BWI procedure was utilized with the ball–mill approach in the RIM test to evaluate torrefied biomass materials. The hybridized procedure has been shown to be both highly correlated to energy consumption and sensitive to degree of torrefaction. The proposed Hybrid Work Index (HWI) is certainly useful for assessing torrefaction in a laboratory environment, but it may also be correlated to grinding energy at industrial scales.

Van Essendelft, D.T.; Zhou, X.; Kang, B.S.-J.

2012-01-01T23:59:59.000Z

346

Impact of intrinsic localized modes of atomic motion on materials properties  

SciTech Connect

Recent neutron and x-ray scattering measurements show intrinsic localized modes (ILMs) in metallic uranium and ionic sodium iodide. Here, the role ILMs play in the behavior of these materials is examined. With the thermal activation of ILMs, thermal expansion is enhanced, made more anisotropic, and, at a microscopic level, becomes inhomogeneous. Interstitial diffusion, ionic conductivity, the annealing rate of radiation damage, and void growth are all influenced by ILMs. The lattice thermal conductivity is suppressed above the ILM activation temperature while no impact is observed in the electrical conductivity. This complement of transport properties suggests that ILMs could improve thermoelectric performance. Ramifications also include thermal ratcheting, a transition from brittle to ductile fracture, and possibly a phase transformation in uranium.

Manley, M E

2010-01-20T23:59:59.000Z

347

Gradient effects on the fracture of inhomogeneous materials  

SciTech Connect

Functionally Graded Materials (FGMs) have a spatial variation in physical properties that can be tailored to meet the needs of a specific application and/or to minimize internal stresses arising from thermal and elastic mismatch. Modeling these materials as inhomogeneous continua allows assessment of the role of the gradient without requiring detailed knowledge of the microstructure. Motivated by the relative difficulty of obtaining analytical solutions to boundary value problems for FGMs, an accurate finite-element code is developed for obtaining numerical planar and axisymmetric linear thermoelastic solutions. In addition an approximate analytical technique for mapping homogeneous-modulus solutions to those for FGMs is assessed and classes of problems to which it applies accurately are identified. The fracture mechanics analysis of FGMs can be characterized by the classic stress intensities, KI and KII, but there has been scarce progress in understanding the role of the modulus gradient in determining fracture initiation and propagation. To address this question, a statistical fracture model is used to correlate near-tip stresses with brittle fracture initiation behavior. This describes the behavior of a material experiencing fracture initiation away from the crack tip. Widely dispersed zones of fracture initiation sites are expected. Finite-length kinks are analyzed to describe the crack path for continuous crack growth. For kink lengths much shorter than the gradient dimension, a parallel stress term describes the deviation of the kinking angle from that for homogeneous materials. For longer kinks there is a divergence of the kink angle predicted by the maximum energy release rate and the pure opening mode criteria.

Becker, T.L.

2000-05-01T23:59:59.000Z

348

Advanced Materials Processing  

Science Conference Proceedings (OSTI)

Feb 15, 2010... the copper bearing materials which did not contain inflammable materials due to a restriction on capacity of furnace waste heat boilers.

349

Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Areas Research Areas Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Directionally Solidified Materials Using high-temperature optical floating zone furnace to produce monocrystalline molybdenum alloy micro-pillars Home | Science & Discovery | Advanced Materials Advanced Materials | Advanced Materials SHARE ORNL has the nation's most comprehensive materials research program and is a world leader in research that supports the development of advanced materials for energy generation, storage, and use. We have core strengths in three main areas: materials synthesis, characterization, and theory. In other words, we discover and make new materials, we study their structure,

350

Material Properties References  

Science Conference Proceedings (OSTI)

... Cryogenics June 1962 p.230-235. Thermal Conductivity. LNG Materials and Fluids. Ed. ... Linear thermal expansion. LNG Materials and Fluids. Ed. ...

2013-02-05T23:59:59.000Z

351

Advanced Research Materials Program  

NLE Websites -- All DOE Office Websites (Extended Search)

materials requirements for all fossil energy systems, including materials for advanced power generation and coal fuels technologies. Examples of these technologies include coal...

352

TMS Materials Cyberinfrastructure Portal  

Science Conference Proceedings (OSTI)

The Materials Cyber- infrastructure Portal serves as an online access point to critical tools and resources—including computational models and materials ...

353

Material Design Tools  

Science Conference Proceedings (OSTI)

Mar 12, 2012 ... In this presentation, we will discuss our activities in developing an infrastructure, named MaterialsGenome® (Trademark of MaterialsGenome, ...

354

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Defining the data challenges associated with building the materials innovation infrastructure at the core of the U.S. Materials Genome Initiative (MGI) was the ...

355

Novel Materials and Phenomenon  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... Magnetic Materials for Energy Applications -III: Novel Materials and ... In traditional Permanent Magnet Machines, such as motors and ...

356

MATERIALS TRANSFER AGREEMENT  

NLE Websites -- All DOE Office Websites (Extended Search)

MTAXX-XXX 1 MATERIAL TRANSFER AGREEMENT for Manufacturing Demonstration Facility and Carbon Fiber Technology Facility In order for the RECIPIENT to obtain materials, the RECIPIENT...

357

Photovoltaic Cell Materials  

Energy.gov (U.S. Department of Energy (DOE))

Although crystalline silicon cells are the most common type, photovoltaic (PV), or solar cells, can be made of many semiconductor materials. Each material has unique strengths and characteristics...

358

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

DOE Awards $45 Million to Deploy Advanced Transportation Technologies · Novel Electrode Material Offers Alternative for Li-ion Batteries · New Materials Make ...

359

IOMMMS Global Materials Forum  

Science Conference Proceedings (OSTI)

Natural Fiber Composites – Significant Contribution to a Green Economy · Recent Development of Materials for Green Energy in Korea · The Role of Materials ...

360

Jet Engine Coatings Resist Volcanic Ash Damage - Materials ...  

Science Conference Proceedings (OSTI)

Apr 27, 2011 ... Upon cooling, the molten ash forms a brittle glass that flakes off, taking the coating with it. Like sand, ash is made mostly of silica and poses a ...

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Chapter 6: Materials  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

: Materials : Materials Material Selection Sustainable Building Materials System Integration Issues | Chapter 6 Material Selection Materials The use of durable, attractive, and environmentally responsible building materials is a key element of any high-performance building effort. The use of natural and healthy materials contributes to the well-being of the occupants and to a feeling of connection with the bounty of the natural world. Many construction materials have significant environ- mental impacts from pollutant releases, habitat destruc- tion, and depletion of natural resources. This can occur during extraction and acquisition of raw materials, pro- "Then I say the Earth belongs to duction and manufacturing processes, and transporta- tion. In addition, some construction materials can harm

362

NEWTON's Material Science Videos  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Science Videos Material Science Videos Do you have a great material science video? Please click our Ideas page. Featured Videos: University of Maryland - Material Science University of Maryland - Material Science The Department of Materials Science and Engineering offers a set of videos about various topics in material science to help students understand what material science is. Learn about plasma, polymers, liquid crystals and much more. LearnersTV.com - Material Science LearnersTV.com - Material Science LearnersTV.com offers a series of educational material science lectures that are available to the public for free. Learn about topics like polymers, non-crystalline solids, crystal geometry, phase diagrams, phase transformations and more. NanoWerk - Nanotechnology Videos NanoWerk - Nanotechnology Videos

363

Cautionary tales from real world failures for managing security in the cyber world  

Science Conference Proceedings (OSTI)

Any field of endeavor benefits from a body of knowledge of failures that provide guidance on what to avoid. As a relatively young discipline whose failures can often be handled privately, information security professionals do not have access to the volume ... Keywords: bridges, catastrophic failure, civil engineering, failure, lessons learned

Bill Naber

2010-10-01T23:59:59.000Z

364

Grouped Failure Times TIED FAILURE TIMES - TWO CONTRIBUTIONS TO THE ENCYCLOPEDIA OF BIOSTATISTICS  

E-Print Network (OSTI)

ionships between smoking and lung cancer or heart disease and the life span study of over 100,000 Japanese atom bomb survivors in Hiroshima and Nagasaki #Beebe #4##. Another important reason for grouping data is that it is often di#cult or even impossible to obtain exact life time, because ethical, physical or economic restrictions in research design allow the subjects in the follow-up study to be monitored only periodically. Thus, this type of study only provides the grouped information, i.e., the exact failure time is unknown and the only available information is whether the event of interest occurred between two inspection times. The following study illustrate situations where periodic inspection is used: The National Labor Survey of Youth #NLSY# study of time to weaning of breast-fed newborns in which 927 #rst-born children of mothers who chose to breast feed their children were interviewed yearly. Similar to continuous data in survival analysis, grouped survival data can involve c

Mei-Jie Zhang; Mei-jie Zhang Ph. D

1997-01-01T23:59:59.000Z

365

Permanent Magnet Materials  

Science Conference Proceedings (OSTI)

Table 4   Applications of permanent magnet materials...material Primary reason for selection Alternative material Condition or reason favoring selection of alternative material Aircraft magnetos, military or civilian SmCo Maximum energy per unit volume Cast Alnico 5 Availability or cost restraint Alternators SmCo Compactness and reliability Ferrite...

366

Cementitious Materials Workshop - Presentations  

Cementitious Materials for Waste Treatment, Disposal, Remediation and Decommissioning Workshop. December 12-14, 2006

367

Cementitious Materials Workshop - Contacts  

Cementitious Materials for Waste Treatment, Disposal, Remediation and Decommissioning Workshop. December 12-14, 2006

368

Permanent Magnet Materials  

Science Conference Proceedings (OSTI)

Table 4 Applications of permanent magnet materials...material Primary reason for selection Alternative material Condition or reason favoring selection of alternative material Aircraft magnetos, military or civilian SmCo Maximum energy per unit volume Cast Alnico 5 Availability or cost restraint Alternators SmCo Compactness and reliability Ferrite...

369

Materials Innovation Committee - TMS  

Science Conference Proceedings (OSTI)

... SMD Council, - General Committees, ---- Accreditation Committee, ---- Audit Committee, ---- Education Committee, ---- Materials and Society Committee ...

370

About Materials Week '97  

Science Conference Proceedings (OSTI)

LINKS ABOUT INDIANAPOLIS · TOUR INFORMATION · STUDENT ACTIVITIES · SPECIAL EVENTS · MATERIALS EXPOSITION · CALENDAR OF EVENTS

371

Advanced Materials in MML  

Science Conference Proceedings (OSTI)

... Advanced Materials Characterization. Fusion Wall Development Research by Neutron Depth Profiling. < Previous 1 2 3 Next ». ...

2012-06-12T23:59:59.000Z

372

Final report on PCRV thermal cylinder axial tendon failures  

SciTech Connect

The post-test examination of the failed tendons from the PCRV thermal cylinder experiment has been concluded. Failures in the wires are attributed to stress-corrosion cracking. The cause of tendon failures has not been unequivocably established, but they may have been due to nitrates in the duct. The wires employed in the manufacture of the tendons will crack in less than 72 hr in a 0.2 M solution of ammonium nitrate at 70$sup 0$C. The quality of the wires is poor, and surface cracks were detected. These could have acted as concentrating sites for both stress and the deleterious contaminants. It is believed that the factors that led to the failures in the thermal cylinder experiment were unique. An improper formulation of the epoxy resin did not provide the tendon anchor plate seal that was desired; indeed, the improper formulation is responsible for the high level of nitrogen in the ducts of the failed tendons. (auth)

Canonico, D.A.; Griess, J.C.; Robinson, G.C.

1976-01-01T23:59:59.000Z

373

Statistical analysis of cascading failures in power grids  

SciTech Connect

We introduce a new microscopic model of cascading failures in transmission power grids. This model accounts for automatic response of the grid to load fluctuations that take place on the scale of minutes, when optimum power flow adjustments and load shedding controls are unavailable. We describe extreme events, caused by load fluctuations, which cause cascading failures of loads, generators and lines. Our model is quasi-static in the causal, discrete time and sequential resolution of individual failures. The model, in its simplest realization based on the Directed Current description of the power flow problem, is tested on three standard IEEE systems consisting of 30, 39 and 118 buses. Our statistical analysis suggests a straightforward classification of cascading and islanding phases in terms of the ratios between average number of removed loads, generators and links. The analysis also demonstrates sensitivity to variations in line capacities. Future research challenges in modeling and control of cascading outages over real-world power networks are discussed.

Chertkov, Michael [Los Alamos National Laboratory; Pfitzner, Rene [Los Alamos National Laboratory; Turitsyn, Konstantin [Los Alamos National Laboratory

2010-12-01T23:59:59.000Z

374

Interaction of DOE SNF and Packaging Materials  

DOE Green Energy (OSTI)

A sensitivity analysis was conducted to identify and evaluate potential destructive interactions between the materials in US Department of Energy (USDOE) spent nuclear fuels (SNFs) and their storage/disposal canisters. The technical assessment was based on the thermodynamic properties as well as the chemical and physical characteristics of the materials expected inside the canisters. No chemical reactions were disclosed that could feasibly corrode stainless steel canisters to the point of failure. However, the possibility of embrittlement (loss of ductility) of the stainless steel through contact with liquid metal fission products or hydrogen inside the canisters cannot be dismissed. Higher-than-currently-permitted internal gas pressures must also be considered. These results, based on the assessment of two representative 90-year-cooled fuels that are stored at 200°C in stainless steel canisters with internal blankets of helium, may be applied to most of the fuels in the USDOE's SNF inventory.

P. A. Anderson

1998-09-01T23:59:59.000Z

375

Ground control failures. A pictorial view of case studies  

Science Conference Proceedings (OSTI)

The book shows, in pictorial views, many forms and/or stages of types of failures in mines, for instance, cutter, roof falls, and cribs. In each case, the year of occurrence is stated in the beginning so that the environment or technological background under which it occurred are reflected. The narrative than begins with the mining and geological conditions, followed by a description of the ground control problems and recommended solutions and results, if any. The sections cover failure of pillars, roof falls, longwall, roof bolting, multiple-seam mining, floor heave, longwall, flooding and weathering of coal, old workings, and shortwall and thin-seam plow longwall.

Peng, S.S.

2007-07-01T23:59:59.000Z

376

Tests find hammering, fluid cutting, erosion cause float shoe failures  

SciTech Connect

The results of a systematic test program to evaluate float equipment performance are presented. The testing has destroyed, over an eightmonth period, 160 float valves, float shoes and float collars. A new float valve design with greater resistance to failure has been developed as a result of the testing. New float collars and float shoes are expected to provide the operator with a failure rate of less than 1 1/2% when used within design limits and under normal cementing conditions. Further testing objectives include: extension of operating temperature limits to include deep well and geothermal conditions, and evaluation of the effects of more abrasive mud and cement systems.

Stringfellow, B.

1985-01-21T23:59:59.000Z

377

Manual of Bearing Failures and Repair in Power Plant Rotating Equipment  

Science Conference Proceedings (OSTI)

Turbine bearing failures in electric utilities can be responsible for outages resulting in significant lost generation time. In addition to bearing failures in the turbogenerators, failures may occur in other rotating equipment, such as pumps, fans, and auxiliary systems. Knowledge of bearing failure mechanisms and causes allows utilities to introduce safeguards into their occurrence and take faster remedial action. EPRI released the initial report, Manual of Bearing Failures and Repair in Power Plant Ro...

2011-12-15T23:59:59.000Z

378

Micromechanics of Dynamic Solid-to-Solid Phase Transformations  

Science Conference Proceedings (OSTI)

The influence of material heterogeneity on retained high-pressure phases, damage, and texture ... A Dislocation Dynamics Model of the Plastic Flow of fcc Polycrystals: ... Dynamic Contact Failure of Two Brittle Particles under Compression ... Grit on Shear Localization of HMX-Based Explosives in Drop Hammer Impact Tests.

379

Joining of dissimilar materials  

DOE Patents (OSTI)

A method of joining dissimilar materials having different ductility, involves two principal steps: Decoration of the more ductile material's surface with particles of a less ductile material to produce a composite; and, sinter-bonding the composite produced to a joining member of a less ductile material. The joining method is suitable for joining dissimilar materials that are chemically inert towards each other (e.g., metal and ceramic), while resulting in a strong bond with a sharp interface between the two materials. The joining materials may differ greatly in form or particle size. The method is applicable to various types of materials including ceramic, metal, glass, glass-ceramic, polymer, cermet, semiconductor, etc., and the materials can be in various geometrical forms, such as powders, fibers, or bulk bodies (foil, wire, plate, etc.). Composites and devices with a decorated/sintered interface are also provided.

Tucker, Michael C; Lau, Grace Y; Jacobson, Craig P

2012-10-16T23:59:59.000Z

380

Quantifying uncertainty from material inhomogeneity.  

SciTech Connect

Most engineering materials are inherently inhomogeneous in their processing, internal structure, properties, and performance. Their properties are therefore statistical rather than deterministic. These inhomogeneities manifest across multiple length and time scales, leading to variabilities, i.e. statistical distributions, that are necessary to accurately describe each stage in the process-structure-properties hierarchy, and are ultimately the primary source of uncertainty in performance of the material and component. When localized events are responsible for component failure, or when component dimensions are on the order of microstructural features, this uncertainty is particularly important. For ultra-high reliability applications, the uncertainty is compounded by a lack of data describing the extremely rare events. Hands-on testing alone cannot supply sufficient data for this purpose. To date, there is no robust or coherent method to quantify this uncertainty so that it can be used in a predictive manner at the component length scale. The research presented in this report begins to address this lack of capability through a systematic study of the effects of microstructure on the strain concentration at a hole. To achieve the strain concentration, small circular holes (approximately 100 {micro}m in diameter) were machined into brass tensile specimens using a femto-second laser. The brass was annealed at 450 C, 600 C, and 800 C to produce three hole-to-grain size ratios of approximately 7, 1, and 1/7. Electron backscatter diffraction experiments were used to guide the construction of digital microstructures for finite element simulations of uniaxial tension. Digital image correlation experiments were used to qualitatively validate the numerical simulations. The simulations were performed iteratively to generate statistics describing the distribution of plastic strain at the hole in varying microstructural environments. In both the experiments and simulations, the deformation behavior was found to depend strongly on the character of the nearby microstructure.

Battaile, Corbett Chandler; Emery, John M.; Brewer, Luke N.; Boyce, Brad Lee

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Comprehensive Nuclear Materials  

Science Conference Proceedings (OSTI)

This book encompasses a rich seam of current information on the vast and multidisciplinary field of nuclear materials employed in fission and prototype fusion systems. Discussion includes both historical and contemporary international research in nuclear materials, from Actinides to Zirconium alloys, from the worlds leading scientists and engineers. Synthesizes pertinent current science to support the selection, assessment, validation and engineering of materials in extreme nuclear environments. The work discusses the major classes of materials suitable for usage in nuclear fission, fusion reactors and high power accelerators, and for diverse functions in fuels, cladding, moderator and control materials, structural, functional, and waste materials.

Konings, Dr. Rudy J. M. [European Commission Joint Research Centre; Allen, Todd R. [University of Wisconsin, Madison; Stoller, Roger E [ORNL; Yamanaka, Prof. Shinsuke [Osaka University

2012-01-01T23:59:59.000Z

382

ON-LINE THERMAL BARRIER COATING MONITORING FOR REAL-TIME FAILURE PROTECTION AND LIFE MAXIMIZATION  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization,'' to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability availability maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can therefore accelerate the degradation of substrate components materials and eventually lead to a premature failure of critical component and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Westinghouse Power Corporation has teamed with Indigo Systems, a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization in the field of infrared non-destructive examination (NDE), to complete the program.

Dennis H. LeMieux

2002-04-01T23:59:59.000Z

383

ON-LINE THERMAL BARRIER COATING MONITORING FOR REAL-TIME FAILURE PROTECTION AND LIFE MAXIMIZATION  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization,'' to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability, availability, and maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can, therefore, accelerate the degradation of substrate component materials and eventually lead to a premature failure of critical components and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Westinghouse Power Corporation has teamed with Indigo Systems, a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization in the field of infrared non-destructive examination (NDE), to complete the program.

Dennis H. LeMieux

2003-07-01T23:59:59.000Z

384

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability availability maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can therefore accelerate the degradation of substrate components materials and eventually lead to a premature failure of critical component and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Westinghouse Power Corporation has teamed with Indigo Systems, a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization in the field of infrared non-destructive examination (NDE), to complete the program.

Dennis H. LeMieux

2005-04-01T23:59:59.000Z

385

ON-LINE THERMAL BARRIER COATING MONITORING FOR REAL-TIME FAILURE PROTECTION AND LIFE MAXIMIZATION  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization,'' to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability, availability, and maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can, therefore, accelerate the degradation of substrate component materials and eventually lead to a premature failure of critical components and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Westinghouse Power Corporation has teamed with Indigo Systems, a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization in the field of infrared non-destructive examination (NDE), to complete the program.

Dennis H. LeMieux

2003-10-01T23:59:59.000Z

386

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Power Generation, Inc proposed a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land-based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability availability maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can therefore accelerate the degradation of substrate components materials and eventually lead to a premature failure of critical component and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Power Generation, Inc. has teamed with Indigo Systems, a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization in the field of infrared non-destructive examination (NDE), to complete the program.

Dennis H. LeMieux

2005-10-01T23:59:59.000Z

387

On-Line Thermal Barrier Coating Monitoring for Real-Time Failure Protection and Life Maximization  

SciTech Connect

Under the sponsorship of the U. S. Department of Energy's National Energy Laboratory, Siemens Westinghouse Power Corporation proposes a four year program titled, ''On-Line Thermal Barrier Coating (TBC) Monitor for Real-Time Failure Protection and Life Maximization'', to develop, build and install the first generation of an on-line TBC monitoring system for use on land -based advanced gas turbines (AGT). Federal deregulation in electric power generation has accelerated power plant owner's demand for improved reliability availability maintainability (RAM) of the land-based advanced gas turbines. As a result, firing temperatures have been increased substantially in the advanced turbine engines, and the TBCs have been developed for maximum protection and life of all critical engine components operating at these higher temperatures. Losing TBC protection can therefore accelerate the degradation of substrate components materials and eventually lead to a premature failure of critical component and costly unscheduled power outages. This program seeks to substantially improve the operating life of high cost gas turbine components using TBC; thereby, lowering the cost of maintenance leading to lower cost of electricity. Siemens Westinghouse Power Corporation has teamed with Indigo Systems; a supplier of state-of-the-art infrared camera systems, and Wayne State University, a leading research organization.

Dennis H. LeMieux

2004-10-01T23:59:59.000Z

388

Power Transformer Failure Investigation and Root Cause Analysis  

Science Conference Proceedings (OSTI)

This report provides practical, step-by-step guidance to help utility personnel gather evidence and perform investigations on failed or retired high-voltage substation power transformers to assist in determining the cause of the transformer failure or the service condition of retired units.

2011-12-21T23:59:59.000Z

389

Predicting electricity distribution feeder failures using machine learning susceptibility analysis  

E-Print Network (OSTI)

This work has been partly supported by a research contract from Consolidated Edison. A Machine Learning (ML) System known as ROAMS (Ranker for Open-Auto Maintenance Scheduling) was developed to create failure-susceptibility rankings for almost one thousand 13.8kV-27kV energy distribution feeder cables that supply electricity to the boroughs of New

Philip Gross; Albert Boulanger; Marta Arias; David Waltz; Philip M. Long; Charles Lawson; Roger Anderson; Matthew Koenig; Mark Mastrocinque; William Fairechio; John A. Johnson; Serena Lee; Frank Doherty; Arthur Kressner

2006-01-01T23:59:59.000Z

390

Power system failure analysis by using the discrete wavelet transform  

Science Conference Proceedings (OSTI)

Voltage variations are the most common power quality events that may result in corruption of different industrial processes. The electric power utility industry requires significant improvement in the quality of power provided to customers during faults ... Keywords: discrete wavelet transform, power system failure, wavelet entropy

Ismail Yilmazlar; Gulden Kokturk

2010-05-01T23:59:59.000Z

391

Turbine Nozzles Failure Due to Bird Strike - Programmaster.org  

Science Conference Proceedings (OSTI)

Presentation Title, Turbine Nozzles Failure Due to Bird Strike ... crystal (SX) nickel-based superalloy with environmental coatings on the flow path ... was caused by clogged cooling holes and film cooling reduction, resulting in ... Analysis of Crack Development Involving a Pressure Vessel in a Synthetic Gas Production Plant.

392

Industry-wide Substation Equipment Performance and Failure Database - Enhancements  

Science Conference Proceedings (OSTI)

EPRIs Transformer Industrywide Database (IDB) is a collaborative effort to pool appropriate transformer operating and failure data in order to assemble a statistically valid population of many types of power transformers. Analysis of this data will provide information about transformer historical performance useful for aiding both asset management and maintenance management. This report presents the current status of the Transformer IDB development.

2009-12-23T23:59:59.000Z

393

Power Transformer Failure Investigation and Root Cause Analysis  

Science Conference Proceedings (OSTI)

This report provides practical, step-by-step guidance to help utility personnel gather evidence and perform investigations on failed or retired high-voltage substation power transformers to assist in determining the cause of the transformer failure or the service condition of retired units.

2010-12-23T23:59:59.000Z

394

Energy-Efficient Neuronal Computation via Quantal Synaptic Failures  

E-Print Network (OSTI)

Energy-Efficient Neuronal Computation via Quantal Synaptic Failures William B Levy1 and Robert A, and many of these com- promises can be expressed in terms of energy efficiency. For example, a compromise; efficiency; energy; entropy; infor- mation theory; mutual information; optimization; quantal fail- ures

Levy, William B.

395

MEMS Reliability: Infrastructure, Test Structures, Experiments, and Failure Modes  

Science Conference Proceedings (OSTI)

The burgeoning new technology of Micro-Electro-Mechanical Systems (MEMS) shows great promise in the weapons arena. We can now conceive of micro-gyros, micro-surety systems, and micro-navigators that are extremely small and inexpensive. Do we want to use this new technology in critical applications such as nuclear weapons? This question drove us to understand the reliability and failure mechanisms of silicon surface-micromachined MEMS. Development of a testing infrastructure was a crucial step to perform reliability experiments on MEMS devices and will be reported here. In addition, reliability test structures have been designed and characterized. Many experiments were performed to investigate failure modes and specifically those in different environments (humidity, temperature, shock, vibration, and storage). A predictive reliability model for wear of rubbing surfaces in microengines was developed. The root causes of failure for operating and non-operating MEMS are discussed. The major failure mechanism for operating MEMS was wear of the polysilicon rubbing surfaces. Reliability design rules for future MEMS devices are established.

TANNER,DANELLE M.; SMITH,NORMAN F.; IRWIN,LLOYD W.; EATON,WILLIAM P.; HELGESEN,KAREN SUE; CLEMENT,J. JOSEPH; MILLER,WILLIAM M.; MILLER,SAMUEL L.; DUGGER,MICHAEL T.; WALRAVEN,JEREMY A.; PETERSON,KENNETH A.

2000-01-01T23:59:59.000Z

396

Integrated Boiler Tube Failure Reduction/Cycle Chemistry Improvement Program  

Science Conference Proceedings (OSTI)

Boiler tube failures (BTF) and cycle chemistry corrosion and deposition problems remain the leading causes of availability losses in fossil-fired steam plants worldwide. This report describes techniques developed during a 20-year EPRI project to assist utilities in substantially reducing availability and performance losses due to these problems.

2006-05-16T23:59:59.000Z

397

SOLERAS - Analysis of photovoltaic concentrator module failures and repair methods  

Science Conference Proceedings (OSTI)

This report presents the results of the failure analysis, performed from early 1984 through September 1986 on the open-circuited modules, and the assessment of repairing these modules on site at the Solar Village. 16 refs., 26 figs., 19 tabs.

Huraib, F.S.; Imamura, M.S.; Salim, A.A.; Rao, N.R.

1987-06-01T23:59:59.000Z

398

Cascading Failures in Smart Grid -Benefits of Distributed Generation  

E-Print Network (OSTI)

Cascading Failures in Smart Grid - Benefits of Distributed Generation Xian Chen, Hieu Dinh, Bing reliability and reducing the risk of cascading blackouts is a critical issue. Smart grid is envisioned Wang Computer Science & Engineering Department, University of Connecticut, Storrs, CT 06269 Abstract--Smart

Wang, Bing

399

Static Worksharing Strategies for Heterogeneous Computers with Unrecoverable Failures  

E-Print Network (OSTI)

Static Worksharing Strategies for Heterogeneous Computers with Unrecoverable Failures Anne Benoit1 computers that can assist in computing the workload. How can one best utilize the computers? Two features complicate this question. First, the remote computers may differ from one another in speed. Second, each

Paris-Sud XI, Université de

400

Diagnosis of PEMFC Stack Failures via Electrochemical Impedance Spectroscopy.  

E-Print Network (OSTI)

Membrane fuel cells (dehydration and flooding) were investigated using electrochemical impedance. A four-cell stack capable of delivering individually conditioned reactants to each cell was designed set of measurements covering these ranges. The failure modes were simulated on individual cells within

Victoria, University of

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

FAILURE MODES AND EFFECTS ANALYSIS Dated: May 27, 2010  

E-Print Network (OSTI)

................................................................................................................................. 49 WBS Element 3.2 Cooling Water System Component: Coolant Distribution in Test Cell in the NSTX Test Cell, as well as other D-site systems whose failure could damage the NSTX device, or which have been significantly modified for use on NSTX, or which relate to safe access to the NSTX Test Cell

Princeton Plasma Physics Laboratory

402

Computer-Aided Materials Selection  

Science Conference Proceedings (OSTI)

Table 42   Examples of materials information required during product design...identification Material class (metal, plastic, ceramic, composite) Material subclass Material industry designation Material product form Material condition designation (temper, heat treatment, etc.) Material specification Material alternative names Material component designations (composite/assembly)...

403

Lightweighting Materials | Clean Energy | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

ORNL conducts lightweighting materials research in several areas: materials development, properties and manufacturing, computational materials science, and multi-material enabling...

404

EC Transmission Line Materials  

SciTech Connect

The purpose of this document is to identify materials acceptable for use in the US ITER Project Office (USIPO)-supplied components for the ITER Electron cyclotron Heating and Current Drive (ECH&CD) transmission lines (TL), PBS-52. The source of material property information for design analysis shall be either the applicable structural code or the ITER Material Properties Handbook. In the case of conflict, the ITER Material Properties Handbook shall take precedence. Materials selection, and use, shall follow the guidelines established in the Materials Assessment Report (MAR). Materials exposed to vacuum shall conform to the ITER Vacuum Handbook. [Ref. 2] Commercial materials shall conform to the applicable standard (e.g., ASTM, JIS, DIN) for the definition of their grade, physical, chemical and electrical properties and related testing. All materials for which a suitable certification from the supplier is not available shall be tested to determine the relevant properties, as part of the procurement. A complete traceability of all the materials including welding materials shall be provided. Halogenated materials (example: insulating materials) shall be forbidden in areas served by the detritiation systems. Exceptions must be approved by the Tritium System and Safety Section Responsible Officers.

Bigelow, Tim S [ORNL

2012-05-01T23:59:59.000Z

405

Crashworthiness analysis using advanced material models in DYNA3D  

DOE Green Energy (OSTI)

As part of an electric vehicle consortium, LLNL and Kaiser Aluminum are conducting experimental and numerical studies on crashworthy aluminum spaceframe designs. They have jointly explored the effect of heat treat on crush behavior and duplicated the experimental behavior with finite-element simulations. The major technical contributions to the state of the art in numerical simulation arise from the development and use of advanced material model descriptions for LLNL`s DYNA3D code. Constitutive model enhancements in both flow and failure have been employed for conventional materials such as low-carbon steels, and also for lighter weight materials such as aluminum and fiber composites being considered for future vehicles. The constitutive model enhancements are developed as extensions from LLNL`s work in anisotropic flow and multiaxial failure modeling. Analysis quality as a function of level of simplification of material behavior and mesh is explored, as well as the penalty in computation cost that must be paid for using more complex models and meshes. The lightweight material modeling technology is being used at the vehicle component level to explore the safety implications of small neighborhood electric vehicles manufactured almost exclusively from these materials.

Logan, R.W.; Burger, M.J.; McMichael, L.D. [Lawrence Livermore National Lab., CA (United States); Parkinson, R.D. [Kaiser Aluminum & Chemical Corp., Pleasanton, CA (United States). Center for Technology

1993-10-22T23:59:59.000Z

406

Comprehensive physical models and simulation package for plasma/material interactions during plasma instabilities.  

SciTech Connect

Damage to plasma-facing components (PFCS) from plasma instabilities remains a major obstacle to a successful tokamak concept. The extent of the damage depends on the detailed physics of the disrupting plasma, as well as on the physics of plasma-material interactions. A comprehensive computer package called High Energy Interaction with General Heterogeneous Target Systems (HEIGHTS) has been developed and consists of several integrated computer models that follow the beginning of a plasma disruption at the scrape-off layer (SOL) through the transport of the eroded debris and splashed target materials to nearby locations as a result of the deposited energy. The package can study, for the first time, plasma-turbulent behavior in the SOL and predict the plasma parameters and conditions at the divertor plate. Full two-dimensional (2-D) comprehensive radiation magnetohydrodynamic (MHD) models are coupled with target thermodynamics and liquid hydrodynamics to evaluate the integrated response of plasma-facing materials. Factors that influence the lifetime of plasma-facing and nearby components, such as loss of vapor-cloud confinement and vapor removal due to MHD effects, damage to nearby components due to intense vapor radiation, melt splashing, and brittle destruction of target materials, are also modeled and discussed.

Hassanein, A.

1998-08-26T23:59:59.000Z

407

Development and deployment of constitutive softening routines in Eulerian hydrocodes.  

SciTech Connect

The state of the art in failure modeling enables assessment of crack nucleation, propagation, and progression to fragmentation due to high velocity impact. Vulnerability assessments suggest a need to track material behavior through failure, to the point of fragmentation and beyond. This eld of research is particularly challenging for structures made of porous quasi-brittle materials, such as ceramics used in modern armor systems, due to the complex material response when loading exceeds the quasi-brittle material's elastic limit. Further complications arise when incorporating the quasi-brittle material response in multi-material Eulerian hydrocode simulations. In this report, recent e orts in coupling a ceramic materials response in the post-failure regime with an Eulerian hydro code are described. Material behavior is modeled by the Kayenta material model [2]and Alegra as the host nite element code [14]. Kayenta, a three invariant phenomenological plasticity model originally developed for modeling the stress response of geologic materials, has in recent years been used with some success in the modeling of ceramic and other quasi-brittle materials to high velocity impact. Due to the granular nature of ceramic materials, Kayenta allows for signi cant pressures to develop due to dilatant plastic ow, even in shear dominated loading where traditional equations of state predict little or no pressure response. When a material's ability to carry further load is compromised, Kayenta allows the material's strength and sti ness to progressively degrade through the evolution of damage to the point of material failure. As material dilatation and damage progress, accommodations are made within Alegra to treat in a consistent manner the evolving state.

Fuller, Timothy Jesse; Dewers, Thomas A.; Swan, Matthew Scot

2013-03-01T23:59:59.000Z

408

ARM - Public Information Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

govPublicationsPublic Information Materials govPublicationsPublic Information Materials Publications Journal Articles Conference Documents Program Documents Technical Reports Publications Database Public Information Materials Image Library Videos Publication Resources Submit a Publication Publishing Procedures ARM Style Guide (PDF, 448KB) Acronyms Glossary Logos Contacts RSS for Publications Public Information Materials The ARM Climate Research Facility develops public information materials to communicate the purpose and objectives of the program to general audiences. These materials are designed to increase awareness of ARM Climate Research Facility goals and to document its scientific results to a lay audience. Public information materials include fact sheets, brochures, CDs, videos, press releases, and information packets. Approved materials are made

409

Materials/Condensed Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials/Condensed Matter Print Materials/Condensed Matter Print Materials research provides the foundation on which the economic well being of our high-tech society rests. The impact of advanced materials ranges dramatically over every aspect of our modern world from the minutiae of daily life to the grand scale of our national economy. Invariably, however, breakthroughs to new technologies trace their origin both to fundamental research in the basic properties of condensed matter and to applied research aimed at manipulating properties (structural, physical, chemical, electrical, magnetic, optical, etc.). Increasingly, the frontiers of materials research include materials that are "strongly correlated," characterized by strong coupling between a material's electrons with other electrons, magnetism, or the material lattice itself. This coupling often results in novel behavior, such as superconductivity, that may lead to technologically important applications.

410

Structural Materials - Characterization  

Science Conference Proceedings (OSTI)

Mar 14, 2012 ... Cr, are important structural materials for use in advanced nuclear ... holds promise for grain boundary engineering of surface and near-surface ... nuclear structural material Alloy 690 to illustrate the effects of shield gas, travel ...

411

Battery separator material  

SciTech Connect

A novel, improved battery separator material particularly adaptable for use in maintenance free batteries. The battery separator material includes a diatomaceous earth filler, an acrylate copolymer binder and a combination of fibers comprising polyolefin, polyester and glass fibers.

Bodendorf, W. J.

1985-07-16T23:59:59.000Z

412

Nanocomposites as thermoelectric materials  

E-Print Network (OSTI)

Thermoelectric materials have attractive applications in electric power generation and solid-state cooling. The performance of a thermoelectric device depends on the dimensionless figure of merit (ZT) of the material, ...

Hao, Qing

2010-01-01T23:59:59.000Z

413

Energy Absorbing Material  

To overcome limitations with cellular silicone foams, LLNL innovators have developed a new 3D energy absorbing material with tailored/engineered bulk-scale properties. The energy absorbing material has 3D patterned architectures specially designed for ...

414

Factors of material consumption  

E-Print Network (OSTI)

Historic consumption trends for materials have been studied by many researchers, and, in order to identify the main drivers of consumption, special attention has been given to material intensity, which is the consumption ...

Silva Díaz, Pamela Cristina

2012-01-01T23:59:59.000Z

415

Nanostructured composite reinforced material  

DOE Patents (OSTI)

A family of materials wherein nanostructures and/or nanotubes are incorporated into a multi-component material arrangement, such as a metallic or ceramic alloy or composite/aggregate, producing a new material or metallic/ceramic alloy. The new material has significantly increased strength, up to several thousands of times normal and perhaps substantially more, as well as significantly decreased weight. The new materials may be manufactured into a component where the nanostructure or nanostructure reinforcement is incorporated into the bulk and/or matrix material, or as a coating where the nanostructure or nanostructure reinforcement is incorporated into the coating or surface of a "normal" substrate material. The nanostructures are incorporated into the material structure either randomly or aligned, within grains, or along or across grain boundaries.

Seals, Roland D. (Oak Ridge, TN); Ripley, Edward B. (Knoxville, TN); Ludtka, Gerard M. (Oak Ridge, TN)

2012-07-31T23:59:59.000Z

416

LANL: Materials Science Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Laboratory (MSL) is Materials Science Laboratory (MSL) is an interdisciplinary facility dedicated to research on current materials and those of future interest. It is a 56,000 square-foot modern facility that can be easily reconfigured to accom- modate new processes and operations. It compris- es 27 laboratories, 15 support rooms, and 60 offices. The MSL supports many distinct materi- als research topics, grouped into four focus areas: mechanical behavior, materials processing, syn- thesis, and characterization. Research within the MSL supports programs of national interest in defense, energy, and the basic sciences. The MSL is a non-classified area in the Materials Science Complex in close proximity to classified and other non-classified materials research facilities. The Materials Science

417

Effects of Cold Work and Heat Treatment on the Elevated Temperature Rupture Properties of Grade 91 Material  

Science Conference Proceedings (OSTI)

For many years it has been understood that straining austenitic materials reduces their high temperature properties. Recognizing this, the American Society of Mechanical Engineers (ASME) added a section (PG-19) to the Boiler Code, SC-I, which requires heat treatment after forming of austenitic materials. The industry has experienced failures of newer creep-enhanced ferritic materials like Grade 91 that indicate they suffer from the same type of degradation mechanism as austenitic materials. Boiler manufa...

2003-03-28T23:59:59.000Z

418

Effect of Cold-Work and Heat Treatment on the Elevated-Temperature Rupture Properties of Grade 91 Material  

Science Conference Proceedings (OSTI)

For many years it has been understood that straining austenitic materials reduces their high-temperature properties. Recognizing this, the American Society of Mechanical Engineers (ASME) added a section (PG-19) to the Boiler Code, SC-I, which requires heat treatment after the forming of austenitic materials. The industry has experienced failures of newer creep-enhanced ferritic materials such as Grade 91 that indicate that these materials suffer from the same type of degradation mechanism as austenitic m...

2005-01-31T23:59:59.000Z

419

Orlando Materials Innovation  

Science Conference Proceedings (OSTI)

Ford Motor Company. Buddy Damm. Manager, Metallurgical Applications and Modeling Dept. The Timken Company. Frank Preli. Chief Engineer,. Materials and ...

420

Electronics Materials Staff  

Science Conference Proceedings (OSTI)

... Biomaterials Staff; Complex Fluids Staff; Sustainable Polymers Staff; Materials Science and Engineering Division Staff Directory; MML Organization. ...

2012-10-07T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Standard Reference Materials  

Science Conference Proceedings (OSTI)

... Inn, KGW, Liggett, WS, and Hutchinson, JMR (1984), "The National Bureau of Standards Rocky Flats Soil Standard Reference Material," Nuclear ...

422

Enabling Materials Resource Sustainability  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... REWAS 2013: Enabling Materials Resource Sustainability: Enabling Sustainability through Education and Consumer Awareness Sponsored ...

423

Materials and Society Initiatives  

Science Conference Proceedings (OSTI)

broader cross-section of TMS membership on topics including: resource sustainability, energy, environment, and sustainable materials design and processing.

424

Materials Reference Books  

Science Conference Proceedings (OSTI)

Materials Science Reference Books. ... The Smithells Metals Reference Book Brandis and Brook; Butterworth-Heinemann; Published 1992; ISBN ...

2010-10-05T23:59:59.000Z

425

Materials Processing Fundamentals  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium, Materials Processing Fundamentals. Sponsorship, The Minerals, Metals ...

426

Materials Processing & Manufacturing Division  

Science Conference Proceedings (OSTI)

In its broadest scope, the Materials Processing & Manufacturing Division (MPMD) covers manufacturing from product design to production, integrating process ...

427

Materials Science/Crystallography  

Science Conference Proceedings (OSTI)

... Understanding the ormation of Methane Hydrate F ... J.247 agnetic Excitation Spectrum in Spin ... eutron Vibrational Spectroscopy of Organic Materials ...

2003-11-12T23:59:59.000Z

428

SRNL - Cementitious Materials Workshop  

... the Department of Energy, ... engineers, project managers, ... status and future direction of the cement materials technology in radioactive waste ...

429

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Dec 10, 2010 ... ESTABLISHED MATERIALS TECHNOLOGIES ... A new, exciting development is the application of these techniques to biological systems, ...

430

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Aug 13, 2012 ... ESTABLISHED MATERIALS TECHNOLOGIES ... These projects include the development and validation of modeling tools to deliver higher ...

431

Energetic Material – Explosives  

INL has invented a process for creating energetic materials, including trinitrotoluene (TNT).  By using a carbon dioxide environment, which reduces ...

432

Materials Processing Fundamentals  

Science Conference Proceedings (OSTI)

Symposium, Materials Processing Fundamentals ... to be covered in the symposium are all aspects of the fundamentals, synthesis, analysis, design, monitoring, ...

433

Genomics of Electronic Materials  

Science Conference Proceedings (OSTI)

... Metamaterials; Highly correlated electron materials, eg superconductors, such as ... A near-field scanning microwave microscope for characterization ...

2013-08-08T23:59:59.000Z

434

What are Soft Materials  

Science Conference Proceedings (OSTI)

... They form the basis of plastics used in consumer goods, automobiles ... important proteins within foods, preservative agents, and packaging materials. ...

2013-02-20T23:59:59.000Z

435

Inorganic Materials Group  

Science Conference Proceedings (OSTI)

... experimental and computational materials science research. This work will help the US construction industry be competitive in advanced concrete ...

2011-11-08T23:59:59.000Z

436

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Jul 10, 2012... for Learning and Dialogue on Energy Topics, Materials Sustainability ... and electronic equipment and infrastructure, energy production and ...

437

MATERIALS PROCESSING FUNDAMENTALS: II  

Science Conference Proceedings (OSTI)

... Deodoro Trani Capocchi, Department of Metallurgical and Materials Engineering, Escola Politecnica de Universidade de Sao Paulo, Sao Paulo SP-

438

About - Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Administrative & Policy Manual. Scroll up. Scroll down. Technical Divisions Home · TMS Committees Home · Electronic, Magnetic & Photonic Materials ...

439

Materials Bowl application  

Science Conference Proceedings (OSTI)

PROMOTING THE GLOBAL SCIENCE AND ENGINEERING PROFESSIONS ... Bowl. Rules. Official Rules. 1. This contest is open to all Material Advantage ...

440

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

... MI; Elizabeth Holm, Carnegie Mellon University, Pittsburgh, PA; Peter Gumbsch, Fraunhofer Institute for Mechanics of Materials IWM, Freiburg, Germany.

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Powder Materials Committee  

Science Conference Proceedings (OSTI)

Powder Materials for Energy Efficiency in Transportation; January 2011: Organized By: Fernand Marquis Nanomaterials for Renewable Energy ...

442

Advanced neutron absorber materials  

DOE Patents (OSTI)

A neutron absorbing material and method utilizing rare earth elements such as gadolinium, europium and samarium to form metallic glasses and/or noble base nano/microcrystalline materials, the neutron absorbing material having a combination of superior neutron capture cross sections coupled with enhanced resistance to corrosion, oxidation and leaching.

Branagan, Daniel J. (Idaho Falls, ID); Smolik, Galen R. (Idaho Falls, ID)

2000-01-01T23:59:59.000Z

443

A stochastic flow rule for granular materials  

E-Print Network (OSTI)

There have been many attempts to derive continuum models for dense granular flow, but a general theory is still lacking. Here, we start with Mohr-Coulomb plasticity for quasi-2D granular materials to calculate (average) stresses and slip planes, but we propose a "stochastic flow rule" (SFR) to replace the principle of coaxiality in classical plasticity. The SFR takes into account two crucial features of granular materials - discreteness and randomness - via diffusing "spots" of local fluidization, which act as carriers of plasticity. We postulate that spots perform random walks biased along slip-lines with a drift direction determined by the stress imbalance upon a local switch from static to dynamic friction. In the continuum limit (based on a Fokker-Planck equation for the spot concentration), this simple model is able to predict a variety of granular flow profiles in flat-bottom silos, annular Couette cells, flowing heaps, and plate-dragging experiments -- with essentially no fitting parameters -- although it is only expected to function where material is at incipient failure and slip-lines are inadmissible. For special cases of admissible slip-lines, such as plate dragging under a heavy load or flow down an inclined plane, we postulate a transition to rate-dependent Bagnold rheology, where flow occurs by sliding shear planes. With different yield criteria, the SFR provides a general framework for multiscale modeling of plasticity in amorphous materials, cycling between continuum limit-state stress calculations, meso-scale spot random walks, and microscopic particle relaxation.

Ken Kamrin; Martin Z. Bazant

2006-09-19T23:59:59.000Z

444

Tailored Porous Materials  

Science Conference Proceedings (OSTI)

Tailoring of porous materials involves not only chemical synthetic techniques for tailoring microscopic properties such as pore size, pore shape, pore connectivity, and pore surface reactivity, but also materials processing techniques for tailoring the meso- and the macroscopic properties of bulk materials in the form of fibers, thin films and monoliths. These issues are addressed in the context of five specific classes of porous materials: oxide molecular sieves, porous coordination solids, porous carbons, sol-gel derived oxides, and porous heteropolyanion salts. Reviews of these specific areas are preceded by a presentation of background material and review of current theoretical approaches to adsorption phenomena. A concluding section outlines current research needs and opportunities.

BARTON,THOMAS J.; BULL,LUCY M.; KLEMPERER,WALTER G.; LOY,DOUGLAS A.; MCENANEY,BRIAN; MISONO,MAKOTO; MONSON,PETER A.; PEZ,GUIDO; SCHERER,GEORGE W.; VARTULI,JAMES C.; YAGHI,OMAR M.

1999-11-09T23:59:59.000Z

445

Hydrogen Compatibility of Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Compatibility of Materials Compatibility of Materials August 13, 2013 DOE EERE Fuel Cell Technologies Office Webinar Chris San Marchi Sandia National Laboratories Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000 SAND2013-6278P 2 Webinar Objectives * Provide context for hydrogen embrittlement and hydrogen compatibility of materials - Distinguish embrittlement, compatibility and suitability - Examples of hydrogen embrittlement * Historical perspective - Previous work on hydrogen compatibility - Motivation of "Materials Guide" * Identify the landscape of materials compatibility documents

446

NEWTON's Material Science Archive  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Archive: Materials Science Archive: Loading Most Recent Materials Science Questions: Hydrogen Compounds and Heat Conduction Weaving Carbon Nanotubes Metal as Electrical Conductor, Not Thermal Steel Changes with Age PETE, Ultraviolet Light, Benefits Strength of Yarn by Spinning Each Substance Unique Density Alloy versus Constituent Density Knowing When Material is Melted Crystalline Metal Versus Metallic Glass and Conduction Super Glue, Surgery, and Skin Silica Gel Teflon Non-Stick Property Salt Crystal Formation Lubricating Rubber Bands and Elasticity Materials for Venus Probe Crystalline Solids and Lowest Energy Sodium Polycarbonate and Salt Water Early Adhesives Surface Energy and Temperature Separating Polypropylene, Polyester, and Nylon Factors Effecting Polymer Flexibility

447

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems (Presentation)  

DOE Green Energy (OSTI)

Presented at the 7th International Conference on Concentrating Photovoltaic Systems (CPV-7), 4-6 April 2011, Las Vegas, Nevada. Many concentrating photovoltaic (CPV) systems use a polymeric encapsulant to couple an optical component and/or coverglass to the cell. In that location, the encapsulation improves the transmission of concentrated optical flux through interfaces(s) while protecting the cell from the environment. The durability of encapsulation materials, however, is not well established relative to the desired service life of 30 years. Therefore, we have initiated a screen test to identify the field-induced failure modes for a variety of popular PV encapsulation materials.

Miller, D. C.; Muller, M.; Kempe, M. D.; Araki, K.; Kennedy, C. E.; Kurtz, S. R.

2011-04-01T23:59:59.000Z

448

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems (Poster)  

DOE Green Energy (OSTI)

Polymeric encapsulation materials are typically used in concentrating photovoltaic (CPV) modules to protect the cell from the field environment. Because it is physically located adjacent to the cell, the encapsulation is exposed to a high optical flux, often including light in the ultraviolet (UV) and infrared (IR) wavelengths. The durability of encapsulants used in CPV modules is critical to the technology, but is presently not well understood. This work seeks to identify the appropriate material types, field-induced failure mechanisms, and factors of influence (if possible) of polymeric encapsulation. These results will ultimately be weighed against those of future qualification and accelerated life test procedures.

Miller, D. C.; Kempe, M. D.; Araki, K.; Kennedy, C. E.; Kurtz, S. R.

2011-02-01T23:59:59.000Z

449

Materials Science Division - Argonne National Laboratories, Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Home About MSD Information Awards Visit MSD Administrative Staff Division Personnel Research Research Groups Condensed Matter Theory Emerging Materials Energy Conversion and Storage Magnetic Films Molecular Materials Neutron and X-ray Scattering Superconductivity and Magnetism Surface Chemistry Synchrotron Radiation Studies Threat Detection and Analysis Group Research Areas Careers in MSD Internal Sites Search Front Slide 1 November 2013 - Patricia Dehmer (second from right), Deputy Director of Science Programs, DOE Office of Science, joined Argonne Director Eric Isaacs(left) and Associate Laboratory Director for Physical Sciences and Engineering Peter Littlewood(second from left) to tour the recently-opened Energy Sciences Building. Among Dehmer's stops was the crystal growth

450

Survey of failure modes from 122 residential solar water heaters  

DOE Green Energy (OSTI)

This report describes the results of a survey on the operation of active solar heating and cooling systems and their components. Questionnaires were sent to homeowners and installers, covering 122 systems. Results were categorized according to problem severity, location, system type, length of system operation, and time of the year. Approximately 47% of the systems had at least one reliability problem over a two-year period. Flat-plate collector and storage systems were highly reliable. Improper operation of these components was attributed to installation problems. Drainback designs also had the greatest reliability; draindown systems were the least reliable, largely because of the failure of draindown valves. Differential controllers caused the largest number of failures that resulted in a repair cost in excess of $50 to the homeowner.

Not Available

1984-10-01T23:59:59.000Z

451

Efforts by the nuclear industry to evaluate check valve failures  

SciTech Connect

Recent studies identified approximately 4000 check valve failures that occurred from 1984-1991. Of these, approximately 1600 were determined to be significant enough to require further analysis. This is to be compared with the existing check valve population of nearly 21,000 valves. The strategy proposed in this paper is to establish a refined, centralized check valve failure/reliability database based in part on existing Institute of Nuclear Power Operations (INPO) Nuclear Plant Reliability Data System (NPRDS) data. Ideally the database would be maintained in a central location, augmented with specific component information, overall reliability information, and updated at least biannually. The data would be available to sort and search as desired. The conceptual plan is provided and possible uses of the database are given.

Hart, K.; McElhaney, K.L.; Casada, D.A.

1994-12-31T23:59:59.000Z

452

Failure Rate Data Analysis for High Technology Components  

SciTech Connect

Understanding component reliability helps designers create more robust future designs and supports efficient and cost-effective operations of existing machines. The accelerator community can leverage the commonality of its high-vacuum and high-power systems with those of the magnetic fusion community to gain access to a larger database of reliability data. Reliability studies performed under the auspices of the International Energy Agency are the result of an international working group, which has generated a component failure rate database for fusion experiment components. The initial database work harvested published data and now analyzes operating experience data. This paper discusses the usefulness of reliability data, describes the failure rate data collection and analysis effort, discusses reliability for components with scarce data, and points out some of the intersections between magnetic fusion experiments and accelerators.

L. C. Cadwallader

2007-07-01T23:59:59.000Z

453

Reapplication of energetic materials at fuels  

SciTech Connect

This investigation addresses the combustion-related aspects of the reapplication of energetic materials as fuels in boilers as an economically viable and environmentally acceptable use of excess energetic materials. The economics of this approach indicate that the revenues from power generation and chemical recovery approximately equal the costs of boiler modification and changes in operation. The primary tradeoff is the cost of desensitizing the fuels against the cost of open burn/open detonation (OB/OD) or other disposal techniques. Two principal combustion-related obstacles to the use of energetic-material-derived fuels are NO{sub x} generation and the behavior of metals. NO{sub x} measurements obtained in this investigation indicate that the nitrated components (nitrocellulose, nitroglycerin, etc.) of energetic materials decompose with NO{sub x} as the primary product. This can lead to high uncontrolled NO{sub x} levels (as high as 2600 ppM on a 3% O{sub 2} basis for a 5% blend of energetic material in the fuel). NO{sub x} levels are sensitive to local stoichiometry and temperature. The observed trends resemble those common during the combustion of other nitrogen containing fuels. Implications for NO{sub x} control strategies are discussed. The behavior of inorganic components in energetic materials tested in this investigation could lead to boiler maintenance problems such as deposition, grate failure, and bed agglomeration. The root cause of the problem is the potentially extreme temperature generated during metal combustion. Implications for furnace selection and operation are discussed.

Baxter, L.; Sinquefield, S.; Huey, S.; Lipkin, J.; Shah, D.; Ross, J.; Sclippa, G. [Sandia National Labs., Livermore, CA (United States); Davis, K. [Reaction Engineering Internaional, Salt Lake City, UT (United States)

1995-05-01T23:59:59.000Z

454

Industry-wide Equipment Failure Database (Power Transformers): Data Subsets  

Science Conference Proceedings (OSTI)

Industrywide equipment performance databases (IDBs) provide a means for establishing a broad-based repository of equipment performance data. With proper care and analysis, these data can provide information about the past performance of equipment groups and subgroups and the factors that influence that performance. The Electric Power Research Institute's (EPRI's) Power Transformer IDB is a collaborative effort to pool appropriate power transformer operating and failure data in order to assemble a statist...

2011-11-14T23:59:59.000Z

455

Software Requirements for a System to Compute Mean Failure Cost  

SciTech Connect

In earlier works, we presented a computational infrastructure that allows an analyst to estimate the security of a system in terms of the loss that each stakeholder. We also demonstrated this infrastructure through the results of security breakdowns for the ecommerce case. In this paper, we illustrate this infrastructure by an application that supports the computation of the Mean Failure Cost (MFC) for each stakeholder.

Aissa, Anis Ben [University of Tunis, Belvedere, Tunisia; Abercrombie, Robert K [ORNL; Sheldon, Frederick T [ORNL; Mili, Ali [New Jersey Insitute of Technology

2010-01-01T23:59:59.000Z

456

Investigation of Inter-System Common-Cause Failures  

Science Conference Proceedings (OSTI)

A principal characteristic of a probabilistic safety assessment (PSA) approach compared to a deterministic safety approach is to systematically account for common-cause failures (CCFs) in the study of severe accident scenarios. There has been extensive analysis of intra-system CCFs (within a given system) in the existing fleet of PSA models, but the information and studies that incorporate the potential for inter-system CCFs among systems are limited.

2007-12-21T23:59:59.000Z

457

Industry-Wide Substation Equipment Performance and Failure Database  

Science Conference Proceedings (OSTI)

The Electric Power Research Institutes (EPRIs) Transformer Industrywide Database (IDB) is a collaborative effort to pool appropriate transformer operating and failure data in order to assemble a statistically valid population of many types of power transformers. Analysis of these data will provide information about transformer historical performance and models for projecting future performance useful for aiding both asset management and maintenance managers. This report presents the current status of the...

2010-12-23T23:59:59.000Z

458

Fuel Integrity Monitoring and Failure Evaluation Handbook, Revision 1  

Science Conference Proceedings (OSTI)

This handbook documents the current status of light water reactor (LWR) fuel integrity monitoring activities in the U.S. nuclear power industry, with an emphasis on current fuel reliability methods and fuel failure mitigation techniques. The handbook provides information on boiling water reactor (BWR) and pressurized water reactor (PWR) fuel release activity monitoring techniques, including trending and interpreting the activity data with respect to the condition of the failed rods. It also presents an i...

2003-11-14T23:59:59.000Z

459

DOE Collects Civil Penalties for Failure to Certify  

Energy.gov (U.S. Department of Energy (DOE))

The Office of Enforcement recently resolved enforcement actions against thirty-nine companies for failure to submit the required certification reports that their covered products or equipment comply with federal energy and water conservation standards. DOE assessed civil penalties averaging about $8,000 per manufacturer for a wide variety of products, including lighting products, home appliances, and commercial walk-in cooler/freezer components.

460

Power Transformer Failure Investigation and Root Cause Analysis  

Science Conference Proceedings (OSTI)

This report provides practical, step-by-step guidance to help utility personnel gather evidence and perform investigations on failed or retired high-voltage substation power transformers to assist in determining the cause of the transformer’s failure or the service condition of retired units.BackgroundHigh-voltage transformers are essential to the reliability of the power system, but many are aging and nearing the end of their design lives. Transformer ...

2012-12-12T23:59:59.000Z

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Brittle star animation | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

---Natural Gas --Nuclear energy ---Nuclear energy modeling & simulation ---Nuclear fuel cycle ---Reactors -Energy usage --Energy storage ---Batteries ----Lithium-ion batteries...

462

Evaluations of Structural Failure Probabilities and Candidate Inservice Inspection Programs  

SciTech Connect

The work described in this report applies probabilistic structural mechanics models to predict the reliability of nuclear pressure boundary components. These same models are then applied to evaluate the effectiveness of alternative programs for inservice inspection to reduce these failure probabilities. Results of the calculations support the development and implementation of risk-informed inservice inspection of piping and vessels. Studies have specifically addressed the potential benefits of ultrasonic inspections to reduce failure probabilities associated with fatigue crack growth and stress-corrosion cracking. Parametric calculations were performed with the computer code pc-PRAISE to generate an extensive set of plots to cover a wide range of pipe wall thicknesses, cyclic operating stresses, and inspection strategies. The studies have also addressed critical inputs to fracture mechanics calculations such as the parameters that characterize the number and sizes of fabrication flaws in piping welds. Other calculations quantify uncertainties associated with the inputs calculations, the uncertainties in the fracture mechanics models, and the uncertainties in the resulting calculated failure probabilities. A final set of calculations address the effects of flaw sizing errors on the effectiveness of inservice inspection programs.

Khaleel, Mohammad A.; Simonen, Fredric A.

2009-05-01T23:59:59.000Z

463

Market failures and government policies in gas markets  

E-Print Network (OSTI)

This memorandum analyses the fundamental characteristics of the natural gas market and its consequences for government policies. In the past, the European gas market was dominated by state-owned monopolists but since the start of the liberalisation, privatisation and re-regulation in the early 1990s, the market has fundamentally changed. Nevertheless, governments are still involved in the gas industry, not only in gas exporting countries such as Russia, but also in a country like the Netherlands where the government has imposed a cap on production from the main gas field (Groningen) as well as owns shares in the main wholesale trader (Gasunie Trade & Supply) which has the obligation to accept all gas offered by producers on the small fields. In the main report of this project we present a cost-benefit analysis of the Dutch gas-depletion policy. In this memorandum we explore the natural-gas market more broadly, looking for factors why government intervention may be needed using the welfare-economic approach according to which government intervention should be based on the presence of market failures. After a brief description of the main characteristics of the gas industry, we systematically analyse sources of market failures, such as geopolitical factors, economies of scale and externalities, and finally go into the question which policy options may be chosen to address those market failures.

Machiel Mulder; Gijsbert Zwart

2006-01-01T23:59:59.000Z

464

New Functional Imaging Technology to Differentiate between Chronic Obstructive Pulmonary Disease and Heart Failure  

E-Print Network (OSTI)

improvement of congestive heart failure: a pilot study. BMCtesting and the accuracy of heart failure diagnosis in theemergency department. Circ Heart Fail. 2010 Jan;3(1):104-10.

Pollack, Charles V.; Slattery, David E

2011-01-01T23:59:59.000Z

465

Relaxin: Review of Biology and Potential Role in Treating Heart Failure  

E-Print Network (OSTI)

Curr Heart Fail Rep (2010) 7:75–82 DOI 10.1007/s11897-010-Potential Role in Treating Heart Failure Sam L. Teichman &of patients with acute heart failure. Preliminary results

Teichman, Sam L.; Unemori, Elaine; Teerlink, John R.; Cotter, Gad; Metra, Marco

2010-01-01T23:59:59.000Z

466

Transitional failure of carbon nanotube systems under a combination of tension and torsion  

Science Conference Proceedings (OSTI)

Transitional failure envelopes of single- and double-walled carbon nanotubes under combined tension-torsion are predicted using classical molecular dynamics simulations. The observations reveal that while the tensile failure load decreases with combined ...

Byeong-Woo Jeong

2012-01-01T23:59:59.000Z

467

Material Disposal Areas  

NLE Websites -- All DOE Office Websites (Extended Search)

Material Disposal Areas Material Disposal Areas Material Disposal Areas Material Disposal Areas, also known as MDAs, are sites where material was disposed of below the ground surface in excavated pits, trenches, or shafts. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Material Disposal Areas at LANL The following are descriptions and status updates of each MDA at LANL. To view a current fact sheet on the MDAs, click on LA-UR-13-25837 (pdf). MDA A MDA A is a Hazard Category 2 nuclear facility comprised of a 1.25-acre, fenced, and radiologically controlled area situated on the eastern end of Delta Prime Mesa. Delta Prime Mesa is bounded by Delta Prime Canyon to the north and Los Alamos Canyon to the south.

468

Nonconforming Material Process  

NLE Websites -- All DOE Office Websites (Extended Search)

11 Nonconforming Material / Product Process 11_0304 Page 1 of 6 11 Nonconforming Material / Product Process 11_0304 Page 1 of 6 EOTA - Business Process Document Title: Nonconforming Material / Product Process Document Number: P-011 Rev. 11_0304 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: Q-001, Quality Manual Notify of Changes: EOTA Employees Referenced Document(s): F-015 Nonconformance Report, REG-003 Record Register, ISDP-002 Training Production Process P-011 Nonconforming Material / Product Process 11_0304 Page 2 of 6 Revision History: Rev. Description of Change A Initial Release 08_0416 Added verbiage CAR/PAR/IO to Step 2 P-011 Nonconforming Material / Product Process 11_0304 Page 3 of 6 I. Purpose To establish the process for nonconforming material to be identified, segregated and dispositioned to prevent its unintended

469

MST: Organizations: Organic Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Adhesive Bonding Adhesive Bonding Composites Encapsulation Materials Characterization Mechanical Testing Molding, Thermoforming, & Compounding Organizations Organic Materials Composite-to-metal adhesive bond Experimental/analytical study of composit-to-metal adhesive bond. The Organic Materials department in the Advanced Manufacturing and Processing Laboratory provides innovative prototype fabrication, full service small lot production, materials technology, processing expertise, and a broad range of organic material characterization and mechanical testing techniques. We encapsulate, we join and bond, we foam, we analyze and image, we build composite structures. We strive to make you, our customers, successful! We partner with you to find the right combination of materials, processing, and fixturing that will result in the highest value

470

NUCLEAR FUEL MATERIAL  

DOE Patents (OSTI)

An improved method is given for making the carbides of nuclear fuel material. The metal of the fuel material, which may be a fissile and/or fertile material, is transformed into a silicide, after which the silicide is comminuted to the desired particle size. This silicide is then carburized at an elevated temperature, either above or below the melting point of the silicide, to produce an intimate mixture of the carbide of the fuel material and the carbide of silicon. This mixture of the fuel material carbide and the silicon carbide is relatively stable in the presence of moisture and does not exhibit the highly reactive surface condition which is observed with fuel material carbides made by most other known methods. (AEC)

Goeddel, W.V.

1962-06-26T23:59:59.000Z

471

Failure Prediction of Complex Structures Under Loading and ...  

loads; environmental corrosion is another significant stress factor. ... among different materials and how they exhibit crack growth. This method can ...

472

Strain Rate Dependence of Mechanical Properties and Failure ...  

Science Conference Proceedings (OSTI)

Study of Composite Materials Application for Horizontal Axis Wind Turbine Blades · Sustainability, Recycling, and Waste Treatment in the Aluminum Industry .

473

Understanding Degradation and Failure in HTS Conductors Using ...  

Science Conference Proceedings (OSTI)

... Materials Forensics, Three-dimensional Modeling and Fractal Characterization · Vortex Physics in Oxide and Pnictide High Temperature Superconductors.

474

Collapsing and Failure Modes on Cellular Structures Fabricated by ...  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials, Processes and Applications for Additive Manufacturing ... Lubricants in Deposition and Machining of Wire and Arc Additive ...

475

Low-Cost Composite Materials for Polymer Electrolyte Fuel Cell Bipolar Plates  

DOE Green Energy (OSTI)

Polymer electrolyte fuel cells (PEFCS) are under widespread development to produce electrical power for a variety of stationary and transportation applications. To date, the bipolar plate remains the most problematic and costly component of PEFC stacks (1). In addition to meeting cost constraints, bipolar plates must possess a host of other properties, the most important of which are listed in Table 1. The most commonly used material for single cell testing is machined graphite, which is expensive and costly to machine. The brittle nature of graphite also precludes the use of thin components for reducing stack size and weight, which is particularly important for transportation applications. Other stack designs consider the use of metal hardware such as stainless steel (2,3). But a number of disadvantages are associated with stainless steel, including high density, high cost of machining, and possible corrosion in the fuel cell environment. In light of these difficulties, much of the recent work on fuel cell bipolar plate materials has concentrated on graphite/polymer composites (4--8). Composite materials offer the potential advantages of lower cost, lower weight, and greater ease of manufacture than traditional graphite and metal plates. For instance, flow fields can be molded directly into these composites, thereby eliminating the costly and difficult machining step required for graphite or metal hardware.

Busick, D.N.; Wilson, M.S.

1998-11-01T23:59:59.000Z

476

Absolute nuclear material assay  

DOE Patents (OSTI)

A method of absolute nuclear material assay of an unknown source comprising counting neutrons from the unknown source and providing an absolute nuclear material assay utilizing a model to optimally compare to the measured count distributions. In one embodiment, the step of providing an absolute nuclear material assay comprises utilizing a random sampling of analytically computed fission chain distributions to generate a continuous time-evolving sequence of event-counts by spreading the fission chain distribution in time.

Prasad, Manoj K. (Pleasanton, CA); Snyderman, Neal J. (Berkeley, CA); Rowland, Mark S. (Alamo, CA)

2010-07-13T23:59:59.000Z

477

Absolute nuclear material assay  

DOE Patents (OSTI)

A method of absolute nuclear material assay of an unknown source comprising counting neutrons from the unknown source and providing an absolute nuclear material assay utilizing a model to optimally compare to the measured count distributions. In one embodiment, the step of providing an absolute nuclear material assay comprises utilizing a random sampling of analytically computed fission chain distributions to generate a continuous time-evolving sequence of event-counts by spreading the fission chain distribution in time.

Prasad, Manoj K. (Pleasanton, CA); Snyderman, Neal J. (Berkeley, CA); Rowland, Mark S. (Alamo, CA)

2012-05-15T23:59:59.000Z

478

New Superconducting Materials  

Science Conference Proceedings (OSTI)

Superconductors with higher superconducting transition temperatures, higher critical currents, and better mechanical properties would be valuable. This report presents criteria to guide the search for higher transition temperature materials. To determine if candidate materials are suitably metallic, the study carried out detailed electronic structure calculations. These calculations identified boron-containing hydrides as particularly promising as a new class of possible superconducting materials that ma...

1994-11-04T23:59:59.000Z

479

Materials Degradation in Light Water Reactors: Life After 60 | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Materials Degradation in Light Water Reactors: Life After 60 Materials Degradation in Light Water Reactors: Life After 60 Materials Degradation in Light Water Reactors: Life After 60 Nuclear reactors present a very harsh environment for components service. Components within a reactor core must tolerate high temperature water, stress, vibration, and an intense neutron field. Degradation of materials in this environment can lead to reduced performance, and in some cases, sudden failure. A recent EPRI-led study interviewed 47 US nuclear utility executives to gauge perspectives on long-term operation of nuclear reactors. Nearly 90% indicated that extensions of reactor lifetimes to beyond 60 years were likely. When polled on the most challenging issues facing further life extension, two-thirds cited plant reliability as the

480

Materials Degradation in Light Water Reactors: Life After 60 | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Materials Degradation in Light Water Reactors: Life After 60 Materials Degradation in Light Water Reactors: Life After 60 Materials Degradation in Light Water Reactors: Life After 60 Nuclear reactors present a very harsh environment for components service. Components within a reactor core must tolerate high temperature water, stress, vibration, and an intense neutron field. Degradation of materials in this environment can lead to reduced performance, and in some cases, sudden failure. A recent EPRI-led study interviewed 47 US nuclear utility executives to gauge perspectives on long-term operation of nuclear reactors. Nearly 90% indicated that extensions of reactor lifetimes to beyond 60 years were likely. When polled on the most challenging issues facing further life extension, two-thirds cited plant reliability as the

Note: This page contains sample records for the topic "brittle material failure" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Patient-specific modeling of cardiac electromechanics in dyssynchronous heart failure  

E-Print Network (OSTI)

1.3 Congestive Heart1.1: Longitudinal cross-section of the heart . . . . . . .Classification of heart failure . . . . . . . . . . . .

Shin, Jun Seob

2009-01-01T23:59:59.000Z

482

Directing Lithium-ion Battery Failure Analysis with Don-Destructive ...  

Science Conference Proceedings (OSTI)

It is a highly multidisciplinary endeavor requiring expertise in chemistry, metallurgy, polymer science, thermal science, ... Boiler Stack Economizer Tube Failure.

483

A General Review of the Superficial Fatigue Failures Modes Met in ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

484

Accelerated Testing and On-Sun Failure of CPV Die-Attach (Presentation)  

SciTech Connect

Accelerated Testing and On-Sun Failure of CPV Die-attach. Presentation on CPV accelerated reliability testing.

Bosco, N.; Kurtz, S.; Stokes, A.

2010-10-01T23:59:59.000Z

485

Materials Science & Tech Division | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Supporting Organizations Supporting Organizations Center for Nanophase Materials Sciences Chemical Sciences Division Materials Science and Technology BES Chemical Sciences, Geosciences, and Biosciences Program BES Materials Sciences and Engineering Program Joint Institute For Advanced Materials Advanced Materials Home | Science & Discovery | Advanced Materials | Supporting Organizations | Materials Science and Technology SHARE Materials Science and Technology Division The Materials Science and Technology Division is unique within the Department of Energy (DOE) System with mission goals that extend from fundamental materials science to applied materials science and technology. One key component of the division is a strong Basic Energy Sciences (BES) portfolio that pushes the frontiers of materials theory, synthesis

486

Processing Materials for Properties  

Science Conference Proceedings (OSTI)

Functional Products: Fuel Cells, Solar Cells, Flat Panel Display, LED,. Data Storage, Environmental (materials for CO2 sequestration, soil remediation, water

487

Cytomegalovirus Standard Reference Material  

Science Conference Proceedings (OSTI)

... and reagent manufacturers in production of their own calibrants and standards. ... control materials which would be traceable to a NIST standard. ...

2013-03-15T23:59:59.000Z

488

DETE TION MATERIALS  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security ... Enhanced detection of special nuclear materials

489

Composite of refractory material  

DOE Patents (OSTI)

A composite refractory material composition comprises a boron carbide matrix and minor constituents of yttrium-boron-oxygen-carbon phases uniformly distributed throughout the boron carbide matrix.

Holcombe, Cressie E. (Knoxville, TN); Morrow, Marvin S. (Kingston, TN)

1994-01-01T23:59:59.000Z

490

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Feb 16, 2011 ... Lactic acid is a renewable starting material, produced by bacteria grown in vats of biomass, such as glucose and starch from plants. It has been ...

491

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

... the pace of advanced materials discovery, innovation, manufacture, and commercialization. At a White House event on June 24, the second anniversary of .

492

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Jan 11, 2010 ... Advanced materials, off-shore wind power, quantum physics, nanoscience, and metrology are a few of the research areas that will be pursued ...

493

Integrated Computational Materials Education  

Science Conference Proceedings (OSTI)

This short course is based on the Summer School for Integrated Computational Materials Education, which was developed to meet this need. We will present a ...

494

Hazardous Material Security (Maryland)  

Energy.gov (U.S. Department of Energy (DOE))

All facilities processing, storing, managing, or transporting hazardous materials must be evaluated every five years for security issues. A report must be submitted to the Department of the...

495

Emerging Materials Technology  

Science Conference Proceedings (OSTI)

Posted on: 6/19/2013 12:00:00 AM... As materials science and engineering expands to encompass new technologies, such as nanomaterials, biomaterials, and ...

496

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

Though well established as materials science and engineering fields, constant improvements are being made to the production of metals, the processing of ...

497

Ultrafine Grained Materials IV  

Science Conference Proceedings (OSTI)

Nov 1, 2006 ... Print Book and CD-ROM: Advances in Superplasticity and Superplastic Forming 2004. Print Book: Ultrafine Grained Materials III. Print Book: ...

498

Characterization of Advanced Materials  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... In this study, the binary and ternary thermal energy storage materials have been performed the phase equilibrium and characterization studies ...

499

Structural Materials II  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... Materials Corrosion in Molten Fluoride Salts: Kumar Sridharan1; Robert Sellers1; Guiqiu Zheng1; Guoping Cao1; Mark Anderson1; Todd ...

500

Hydrogen Compatibility of Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

materials data related to hydrogen embrittlement - Modeled after existing metals handbooks - Data culled from open literature * Peer-reviewed scientific articles * Public...