Simulation of stress concentration in Mg alloys using the crystal plasticity finite element method

被引：83

作者：

Choi, S. -H. ^{[1
]}

Kim, D. H. ^{[1
]}

Park, S. S. ^{[2
]}

You, B. S. ^{[2
]}

机构：

[1] Sunchon Natl Univ, Dept Met Engn & Mat Sci, Sunchon 540742, South Korea

[2] Korea Inst Mat Sci, Light Met Res Grp, Chang Won 641831, South Korea

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 01期

关键词：

Crystal plasticity; Finite element; Stress concentration; Texture Twinning; CRYSTALLOGRAPHIC TEXTURE EVOLUTION; PLANE-STRAIN COMPRESSION; AL-ZN ALLOY; ORIENTATION GRADIENTS; UNIAXIAL COMPRESSION; MAGNESIUM ALLOYS; ALPHA-TITANIUM; NONBASAL SLIP; DEFORMATION; BEHAVIOR;

D O I：

10.1016/j.actamat.2009.09.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A crystal plasticity finite element method (CPFEM), considering both crystallographic slip and deformation twinning, was developed to simulate the spatial stress concentration in AZ31 Mg alloys during in-plane compression. A predominant twin reorientation (PTR) model was successfully implemented to capture grain reorientation due to deformation twinning in twin-dominated deformation. By using the direct mapping technique for electron backscatter diffraction (EBSD) data, CPFEM can capture the heterogeneity of stress concentration at the grain boundaries in AZ31 Mg alloys during in-plane compression. The model demonstrated that deformation twinning enhances the local stress concentration at the grain boundaries between untwinned and twinned grains. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：320 / 329

页数：10

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