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Title: Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent formulation

Abstract

This paper presents a microstructure sensitive model for predicting mechanical response and texture evolution of metals in the dynamic recrystallization regime. A recently proposed viscoplastic self-consistent (VPSC) formulation for the prediction of recrystallization driven by strain energy and intragranular misorientation is extended to hexagonal close-packed (hcp) metals. The model is applied to the dynamic recrystallization of magnesium alloy WE43 at different temperatures and strain rates. Model predictions in terms of stress-strain response and texture evolution are compared to the experimental measurements and acceptable agreement is achieved. According to the model predictions, superplastic behavior of nuclei was found to be the dominant softening mechanism at high temperatures and low strain rates. High concentration of precipitates at the grain boundaries and presence of alloying elements are the likely causes of low boundary mobility, resulting in nucleation dominated dynamic recrystallization. Relatively strong basal compression textures indicate dominant activity of basal slip, which can be achieved only through large difference in slip resistance between soft basal and hard prismatic and pyramidal modes.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of New Hampshire, Durham, NH (United States)
  3. CCDC Army Research Lab., Aberdeen Proving Ground, MD (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE-USDOD Joint Munitions Program; US Army Research Laboratory (USARL)
OSTI Identifier:
1602743
Alternate Identifier(s):
OSTI ID: 1779321
Report Number(s):
LA-UR-19-28936
Journal ID: ISSN 0749-6419
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Plasticity
Additional Journal Information:
Journal Volume: 130; Journal ID: ISSN 0749-6419
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Microstructures; Thermomechanical processes; Constitutive behavior; Numerical algorithms; VPSC model

Citation Formats

Zecevic, Miroslav, Knezevic, Marko, McWilliams, Brandon A., and Lebensohn, Ricardo A. Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent formulation. United States: N. p., 2020. Web. doi:10.1016/j.ijplas.2020.102705.
Zecevic, Miroslav, Knezevic, Marko, McWilliams, Brandon A., & Lebensohn, Ricardo A. Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent formulation. United States. https://doi.org/10.1016/j.ijplas.2020.102705
Zecevic, Miroslav, Knezevic, Marko, McWilliams, Brandon A., and Lebensohn, Ricardo A. Mon . "Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent formulation". United States. https://doi.org/10.1016/j.ijplas.2020.102705. https://www.osti.gov/servlets/purl/1602743.
@article{osti_1602743,
title = {Modeling of the thermo-mechanical response and texture evolution of WE43 Mg alloy in the dynamic recrystallization regime using a viscoplastic self-consistent formulation},
author = {Zecevic, Miroslav and Knezevic, Marko and McWilliams, Brandon A. and Lebensohn, Ricardo A.},
abstractNote = {This paper presents a microstructure sensitive model for predicting mechanical response and texture evolution of metals in the dynamic recrystallization regime. A recently proposed viscoplastic self-consistent (VPSC) formulation for the prediction of recrystallization driven by strain energy and intragranular misorientation is extended to hexagonal close-packed (hcp) metals. The model is applied to the dynamic recrystallization of magnesium alloy WE43 at different temperatures and strain rates. Model predictions in terms of stress-strain response and texture evolution are compared to the experimental measurements and acceptable agreement is achieved. According to the model predictions, superplastic behavior of nuclei was found to be the dominant softening mechanism at high temperatures and low strain rates. High concentration of precipitates at the grain boundaries and presence of alloying elements are the likely causes of low boundary mobility, resulting in nucleation dominated dynamic recrystallization. Relatively strong basal compression textures indicate dominant activity of basal slip, which can be achieved only through large difference in slip resistance between soft basal and hard prismatic and pyramidal modes.},
doi = {10.1016/j.ijplas.2020.102705},
journal = {International Journal of Plasticity},
number = ,
volume = 130,
place = {United States},
year = {Mon Feb 17 00:00:00 EST 2020},
month = {Mon Feb 17 00:00:00 EST 2020}
}

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Cited by: 32 works
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