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Title: Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel

Abstract

The statistical-thermodynamic dislocation theory developed in previous papers is used here in an analysis of high-temperature deformation of aluminum and steel. Using physics-based parameters that we expect theoretically to be independent of strain rate and temperature, we are able to fit experimental stress-strain curves for three different strain rates and three different temperatures for each of these two materials. Here, our theoretical curves include yielding transitions at zero strain in agreement with experiment. We find that thermal softening effects are important even at the lowest temperatures and smallest strain rates.

Authors:
 [1];  [1];  [2]
  1. Ruhr-Univ Bochum, Bochum (Germany). Lehrstuhl fur Mechanik-Materialtheorie
  2. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1407739
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Le, K. C., Tran, T. M., and Langer, J. S. Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel. United States: N. p., 2017. Web. doi:10.1103/PhysRevE.96.013004.
Le, K. C., Tran, T. M., & Langer, J. S. Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel. United States. doi:10.1103/PhysRevE.96.013004.
Le, K. C., Tran, T. M., and Langer, J. S. Wed . "Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel". United States. doi:10.1103/PhysRevE.96.013004.
@article{osti_1407739,
title = {Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel},
author = {Le, K. C. and Tran, T. M. and Langer, J. S.},
abstractNote = {The statistical-thermodynamic dislocation theory developed in previous papers is used here in an analysis of high-temperature deformation of aluminum and steel. Using physics-based parameters that we expect theoretically to be independent of strain rate and temperature, we are able to fit experimental stress-strain curves for three different strain rates and three different temperatures for each of these two materials. Here, our theoretical curves include yielding transitions at zero strain in agreement with experiment. We find that thermal softening effects are important even at the lowest temperatures and smallest strain rates.},
doi = {10.1103/PhysRevE.96.013004},
journal = {Physical Review E},
issn = {2470-0045},
number = 1,
volume = 96,
place = {United States},
year = {2017},
month = {7}
}

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