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Title: Predicting forming limit diagrams for magnesium alloys using crystal plasticity finite elements

Abstract

The crystal plasticity finite element (CPFE) method was used to predict forming limit strains of hexagonal close-packed (HCP) polycrystalline magnesium alloy sheets, namely AZ31 and ZE10, under an isothermal temperature condition. The strain rate-dependent uniaxial tensile test data along various loading directions and an initial texture were used to determine the constitutive parameters of the crystal plasticity model. A hybrid representative volume element approach, which combines the CPFE and the Marciniak–Kuczynski model, was developed to obtain the forming limit diagram of the magnesium alloys. The predicted forming limits were in excellent agreement with the Nakazima test results. Moreover, the microscopic responses such as slip/twin activation and deformation texture changes during various loading paths from uniaxial tension to the balanced biaxial tension were comprehensively analyzed and discussed from the CPFE results to understand the underlying micro-mechanism for the macro-mechanical responses.

Authors:
 [1];  [1];  [2];  [2];  [3]
  1. Korea Inst. of Materials Science (South Korea)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Seoul National Univ. (South Korea)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1606977
Alternate Identifier(s):
OSTI ID: 1702777
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Plasticity
Additional Journal Information:
Journal Volume: 126; Journal Issue: C; Journal ID: ISSN 0749-6419
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Forming limit diagram; Crystal plasticity; Magnesium alloys; Nakazima test; Finite element simulation

Citation Formats

Bong, Hyuk Jong, Lee, Jinwoo, Hu, Xiaohua, Sun, Xin, and Lee, Myoung-Gyu. Predicting forming limit diagrams for magnesium alloys using crystal plasticity finite elements. United States: N. p., 2019. Web. https://doi.org/10.1016/j.ijplas.2019.11.009.
Bong, Hyuk Jong, Lee, Jinwoo, Hu, Xiaohua, Sun, Xin, & Lee, Myoung-Gyu. Predicting forming limit diagrams for magnesium alloys using crystal plasticity finite elements. United States. https://doi.org/10.1016/j.ijplas.2019.11.009
Bong, Hyuk Jong, Lee, Jinwoo, Hu, Xiaohua, Sun, Xin, and Lee, Myoung-Gyu. Wed . "Predicting forming limit diagrams for magnesium alloys using crystal plasticity finite elements". United States. https://doi.org/10.1016/j.ijplas.2019.11.009. https://www.osti.gov/servlets/purl/1606977.
@article{osti_1606977,
title = {Predicting forming limit diagrams for magnesium alloys using crystal plasticity finite elements},
author = {Bong, Hyuk Jong and Lee, Jinwoo and Hu, Xiaohua and Sun, Xin and Lee, Myoung-Gyu},
abstractNote = {The crystal plasticity finite element (CPFE) method was used to predict forming limit strains of hexagonal close-packed (HCP) polycrystalline magnesium alloy sheets, namely AZ31 and ZE10, under an isothermal temperature condition. The strain rate-dependent uniaxial tensile test data along various loading directions and an initial texture were used to determine the constitutive parameters of the crystal plasticity model. A hybrid representative volume element approach, which combines the CPFE and the Marciniak–Kuczynski model, was developed to obtain the forming limit diagram of the magnesium alloys. The predicted forming limits were in excellent agreement with the Nakazima test results. Moreover, the microscopic responses such as slip/twin activation and deformation texture changes during various loading paths from uniaxial tension to the balanced biaxial tension were comprehensively analyzed and discussed from the CPFE results to understand the underlying micro-mechanism for the macro-mechanical responses.},
doi = {10.1016/j.ijplas.2019.11.009},
journal = {International Journal of Plasticity},
number = C,
volume = 126,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:

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Cited by: 2 works
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