A finite element model of deformation twinning in zirconium

被引：68

作者：

Zhang, Richard Y. ^{[1
]}

Daymond, Mark R. ^{[1
]}

Holt, Richard A. ^{[1
]}

机构：

[1] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 473卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

twinning; finite element; residual stress; internal stress;

D O I：

10.1016/j.msea.2007.04.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A deformation twinning model which simulates the characteristic twin shear and corresponding grain reorientation has been developed using the finite element method. This model has been used to study how twinning affects the stress state in both the parent grain and twin. The results show that the local shear stress is the driving force for the twinning activation. The lenticular morphology of twin plate or lath can be explained by a hyperbola-shaped shear stress curve found along the twin boundary, combined with the change in shape of the shear stress distribution with increasing twin thickness. A criterion to determine the maximum twin volume fraction under a given deformation condition is suggested considering both the local shear stress and the system energy change. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：139 / 146

页数：8

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