Simulation of lattice orientation effects on void growth and coalescence by crystal plasticity  

作　　者：Mei YANG Xianghuai DONG 

机构地区：[1]Department of Plastic Forming, Shanghai Jiaotong University, Shanghai 200030, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2009年第1期40-50,共11页金属学报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.50575143);the Research Fund for the Doctoral Program of Higher Educa-tion (No.20040248005)

摘　　要：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 coalescence. 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 boundary direction.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 coalescence. 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 boundary direction.

关 键 词：Crystal plasticity Void growth Void coalescence Lattice orientation BICRYSTAL 

分 类 号：TG113.25[金属学及工艺—物理冶金]