Simulation of lattice orientation effects on void growth and coalescence by crystal plasticity
来源期刊：Acta Metallurgica Sinica2009年第1期
论文作者：Mei YANG Xianghuai DONG
Key words：Crystal plasticity; Void growth; Void coalescence; Lattice orientation; Bicrystal;
Abstract: A three dimensional rate-dependent crystal plasticity model is applied to study the influence of crystal orientation and grain boundary on the void growth and coales- cence. The 3D computational model is a unit cell including one sphere void or two sphere voids. The results of three different orientations for single crystal and bicrystals are compared. It is found that crystallographic orientation has noticeable influences on the void growth directionvoid shape, and void coalescence of single crystal. The void growth rate of bicrystals depends on the crystallographic orientations and grain bounldary direction.
Mei YANG1，Xianghuai DONG1
(1.Department of Plastic Forming,Shanghai Jiaotong University,Shanghai 200030,China)
Abstract:A three dimensional rate-dependent crystal plasticity model is applied to study the influence of crystal orientation and grain boundary on the void growth and coales- cence. The 3D computational model is a unit cell including one sphere void or two sphere voids. The results of three different orientations for single crystal and bicrystals are compared. It is found that crystallographic orientation has noticeable influences on the void growth directionvoid shape, and void coalescence of single crystal. The void growth rate of bicrystals depends on the crystallographic orientations and grain bounldary direction.
Key words:Crystal plasticity; Void growth; Void coalescence; Lattice orientation; Bicrystal;
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