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Title: Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework

Abstract

We describe a theoretical and computational framework for adiabatic shear banding (ASB) and dynamic recrystallization (DRX) in polycrystalline materials. The Langer-Bouchbinder-Lookman (LBL) thermodynamic theory of polycrystalline plasticity, which we recently reformulated to describe DRX via the inclusion of the grain boundary density or the grain size as an internal state variable, provides a convenient and self-consistent way to represent the viscoplastic and thermal behavior of the material, with minimal ad-hoc assumptions regarding the initiation of yielding or onset of shear banding. Here, we implement the LBL-DRX theory in conjunction with a finite-element computational framework. Favorable comparison to experimental measurements on a top-hat AISI 316L stainless steel sample compressed with a split-Hopkinson pressure bar suggests the accuracy and usefulness of the LBL-DRX framework, and demonstrates the crucial role of DRX in strain localization.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1504652
Report Number(s):
LA-UR-18-27644
Journal ID: ISSN 0749-6419
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Plasticity
Additional Journal Information:
Journal Name: International Journal of Plasticity; Journal ID: ISSN 0749-6419
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Constitutive behavior; Dynamic recrystallization; Shear banding; Steel; Finite-element simulation; Taylor-Quinney coefficient

Citation Formats

Lieou, Charles Ka Cheong, Mourad, Hashem Mohamed, and Bronkhorst, Curt Allan. Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework. United States: N. p., 2019. Web. doi:10.1016/j.ijplas.2019.03.005.
Lieou, Charles Ka Cheong, Mourad, Hashem Mohamed, & Bronkhorst, Curt Allan. Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework. United States. doi:10.1016/j.ijplas.2019.03.005.
Lieou, Charles Ka Cheong, Mourad, Hashem Mohamed, and Bronkhorst, Curt Allan. Tue . "Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework". United States. doi:10.1016/j.ijplas.2019.03.005.
@article{osti_1504652,
title = {Strain localization and dynamic recrystallization in polycrystalline metals: Thermodynamic theory and simulation framework},
author = {Lieou, Charles Ka Cheong and Mourad, Hashem Mohamed and Bronkhorst, Curt Allan},
abstractNote = {We describe a theoretical and computational framework for adiabatic shear banding (ASB) and dynamic recrystallization (DRX) in polycrystalline materials. The Langer-Bouchbinder-Lookman (LBL) thermodynamic theory of polycrystalline plasticity, which we recently reformulated to describe DRX via the inclusion of the grain boundary density or the grain size as an internal state variable, provides a convenient and self-consistent way to represent the viscoplastic and thermal behavior of the material, with minimal ad-hoc assumptions regarding the initiation of yielding or onset of shear banding. Here, we implement the LBL-DRX theory in conjunction with a finite-element computational framework. Favorable comparison to experimental measurements on a top-hat AISI 316L stainless steel sample compressed with a split-Hopkinson pressure bar suggests the accuracy and usefulness of the LBL-DRX framework, and demonstrates the crucial role of DRX in strain localization.},
doi = {10.1016/j.ijplas.2019.03.005},
journal = {International Journal of Plasticity},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
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This content will become publicly available on March 26, 2020
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