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Title: Study of Ductile Fracture Behavior.


Abstract not provided.

; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the 2007 SEM Annual Conference & Exposition held June 3-6, 2007 in Springfield, MA.
Country of Publication:
United States

Citation Formats

Jin, Huiqing, Lu, Wei-Yang, Antoun, Bonnie R., Korellis, John S., Chames, Jeffery M., Yang, Nancy Y. C., and McFadden, Sam. Study of Ductile Fracture Behavior.. United States: N. p., 2007. Web.
Jin, Huiqing, Lu, Wei-Yang, Antoun, Bonnie R., Korellis, John S., Chames, Jeffery M., Yang, Nancy Y. C., & McFadden, Sam. Study of Ductile Fracture Behavior.. United States.
Jin, Huiqing, Lu, Wei-Yang, Antoun, Bonnie R., Korellis, John S., Chames, Jeffery M., Yang, Nancy Y. C., and McFadden, Sam. Tue . "Study of Ductile Fracture Behavior.". United States. doi:.
title = {Study of Ductile Fracture Behavior.},
author = {Jin, Huiqing and Lu, Wei-Yang and Antoun, Bonnie R. and Korellis, John S. and Chames, Jeffery M. and Yang, Nancy Y. C. and McFadden, Sam},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}

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  • The influence of strain rate on the tensile deformation and fracture behavior of powder-fabricated titanium and nickel containing porosity has been investigated. Measurements of uniform strains, local fracture strains, and elongations to failure show that, over the range of strain rates from 10{sup {minus}4} to 10{sup 2} s{sup {minus}1}, there is little or no effect of the strain rate on the fracture behavior of these materials at any of the porosity levels studied. A slight elongation minimum in the two lowest porosity levels for titanium occurs at intermediate strain rates and is interpreted to be due to thermal gradients formingmore » during deformation.« less
  • The mechanics and the mechanisms of ductile fracture in metals are of significance for engineers. The purpose of the research is to clarify the mechanics and the mechanisms of the ductile fracture in various metal forming processes. We have developed a computer program based on a usual computer program of the FEM by which behaviors of crack propagation after ductile fracture can be analyzed, and performed simulations of chevron crack or central burst in drawing, which is an inner defect and occurs periodically toward the drawing direction. We utilize the evolution equation proposed by Needleman and Rice and the yieldmore » function proposed by Gurson. We also carry out experiments by steel in drawing, compare experimental results with analytical ones, and have shown the validity of the simulation.« less
  • The symposium brought together the many communities that investigate the fundamentals of fracture, with special emphasis on the ductile/brittle transition across a broad spectrum of material classes, fracture at interfaces, and modelling fracture over various length scales. Theoretical techniques discussed ranged from first-principles electronic structure theory to atomistic simulation to mesoscale and continuum theories, along with studies of fractals and scaling in fracture. Experimental and theoretical talks were interspersed throughout all sessions, rather than being segregated. The contributions to this volume generally follow the topical outline upon which the symposium was organized. The first part, dealing with ductile vs. brittlemore » behavior in metals, concerns itself with investigations of high-strength steel, magnesium alloys, ordered intermetallics, and Fe-Cr-Al alloys. The development of analytical methods based on micromechanical models, such as dislocation mechanics and cohesive/contact zone models, are covered in a follow-up section. Nonmetals, including silicon, are considered in Parts 3 and 4. Fractals, chaos, and scaling theories are taken up in Part 5, with a special emphasis on fracture in heterogeneous solids. Modelling based on large populations of dislocations has substantially progressed during the past three years; hence, a section devoted to crystal plasticity and mesoscale dislocation modelling appears next. Finally, the technologically significant area of interfacial fracture, with applications to composites and intergranular fracture, is taken up in Part 7. Separate abstracts were prepared for most of the papers in this book.« less
  • This symposium, entitled Fracture: Instability Dynamics, Scaling, and Ductile/Brittle Behavior, was held November 27--December 1, 1995, in Boston, Massachusetts, USA, during the 1995 Materials Research Society Fall Meeting. The purpose was to review the fundamentals of fracture, with special sessions on the ductile/brittle transition, fracture at interfaces, fracture in ceramics and composites, dynamic instabilities in crack propagation, and fractals and scaling in fracture. Investigators used a variety of methods to model fracture, including ab initio techniques, classical molecular dynamics, Green`s function methods, dislocations as point particles or as line segments, statistical mechanical models, finite element models, and continuum models. Experimentalmore » papers also emphasized a wide range of techniques for measuring the effects of fractures, ranging from fracture toughness measurements to atomic-force and scanning-electron microscopy. Major topics included impurity embrittlement, interfacial adhesion, and toughness of ceramics and composites, and the morphology of fracture surfaces. Fifty one papers have been processed separately for inclusion on the data base.« less
  • ASTM E-08 Committee has been developing a new standard, to deal with the fracture mechanics behavior of steels in the ductile to brittle transition region. This paper presents a comparison between the current approach and a new proposal to be used by the nuclear industry to face the problem of determining the behavior of ferritic steels. An emphasis will be given to the application of this proposal and its evaluation using a Brazilian A508 Class 3 nuclear steel.