skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: EVALUATION OF THE HIP DIFFUSION BOND OF A CLAD-TUNGSTEN COMPOSITE USING PUSH-OUT TESTING

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
786907
Report Number(s):
LA-UR-01-5309
TRN: US200306%%169
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Sep 2001
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DIFFUSION; EVALUATION; TESTING; TUNGSTEN; COMPOSITE MATERIALS

Citation Formats

R. RUTHERFORD, S. MALOY, and ET AL. EVALUATION OF THE HIP DIFFUSION BOND OF A CLAD-TUNGSTEN COMPOSITE USING PUSH-OUT TESTING. United States: N. p., 2001. Web.
R. RUTHERFORD, S. MALOY, & ET AL. EVALUATION OF THE HIP DIFFUSION BOND OF A CLAD-TUNGSTEN COMPOSITE USING PUSH-OUT TESTING. United States.
R. RUTHERFORD, S. MALOY, and ET AL. Sat . "EVALUATION OF THE HIP DIFFUSION BOND OF A CLAD-TUNGSTEN COMPOSITE USING PUSH-OUT TESTING". United States. doi:. https://www.osti.gov/servlets/purl/786907.
@article{osti_786907,
title = {EVALUATION OF THE HIP DIFFUSION BOND OF A CLAD-TUNGSTEN COMPOSITE USING PUSH-OUT TESTING},
author = {R. RUTHERFORD and S. MALOY and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Sep 01 00:00:00 EDT 2001},
month = {Sat Sep 01 00:00:00 EDT 2001}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The interfacial characteristics of SiC/C/SiC composites with different fiber-coating bond strengths have been investigated using single-fiber push-out tests. Previous studies have shown that weak or strong bonds can be obtained by using as-received or treated fibers, respectively, and that the stress-strain behavior is improved with the treated fibers. This effect results from multiple branching of the cracks within the interphase. The model used to extract interfacial characteristics from nanoindentation and microindentation tests does not consider the presence of an interphase. However, the results highlight the significant effect of the interphase on the interfacial parameters, as well as the effect ofmore » roughness along the sliding surfaces. For the composite with treated fibers, the uncommon upward curvature of the push-out curves is related to different modes of crack propagation in the interphase. Different techniques are required to analyze the interfacial properties, such as nanoindentation and microindentation with push-out and push-back tests.« less
  • A fracture mechanics based approach is used to compute residual and interfacial fracture energies of some MMC and CMC systems during push-out tests. The phenomenon of bottom debonding in MMC thin slice specimens is examined using experimental results and strain energy computations. Residual stress predictions are correlated with experimentally reported values. The main contribution to the interfacial fracture toughness in MMCs is found to be from the residual stresses and thus the values of G{sub ic}. This factor is also demonstrated in the push-out test simulations for pre-strained specimens, where in the absence of residual stresses, a far higher push-outmore » load is necessary for the same critical strain energy release rate; consequently no fiber push-out is observed at lower loads. Interface fracture toughnesses for certain typical MMC and CMC systems are predicted using the developed methodology.« less
  • Single-well-push-pull tests were used in a contaminated aquifer to evaluate the ability of toluene-oxidizing microorganisms to aerobically cometabolize chlorinated aliphatic hydrocarbons (CAHs) such as trichloroethene (TCE). Groundwater containing dissolved toluene was injected into the saturated zone in biostimulate indigenous toluene-utilizers. The test solution was injected into the aquifer using a standard monitoring well and then was transported under natural-gradient conditions. Transport tests demonstrated similar transport characteristics of the conservative tracer and the reactive solutes. Biostimulation tests were then performed by injecting a test solution containing dissolved toluene substrate, hydrogen peroxide, bromide and nitrate in order to increase the biomass ofmore » toluene-utilizing microorganisms. During the biostimulation tests, decreases in toluene concentration and the production of o-cresol as an intermediate oxidation product, indicated the simulation of toluene-utilizing microorganisms containing an ortho-monooxygenase enzyme. Transformation tests conducted after biostimulation demonstrated that indigenous microorganisms have the capability to transform the surrogate compounds (e.g. isobutene). Isobutene was transformed to isobutene oxide, indicating transformation by a toluene ortho-monooxygenase.« less