High strain rate superplasticity of rolled AZ91 magnesium alloy

查看全文 作　　者：WANG [1]Qudong;WEI [1]Yinhong;Y. [2]Chino;M. [2]Mabuchi

机构地区：[1]State Key Laboratory for Metal Matrix Composites, College of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China;[2]Institute for Structural and Engineering Materials, Nagoya 462-8510, Japan

出　　处：《Rare Metals》索引2008年第27卷第1期,共4页

基　　金：supported by the National Natural Science Foundation of China(No.50674067). 摘　　要：The high strain rate superplastic deformation properties and characteristics of a rolled AZ91 magnesium alloy at temperatures ranging from 623 to 698 K(0.67Tm-0.76Tm) and high strain rates ranging from 10-3 to 1 s-1 were investigated.The rolled AZ91 magnesium alloy possesses excellent superplasticity with the maximum elongation of 455% at 623 K and a strain rate of 10-3 s-1,and its strain rate sensitivity m is high up to 0.64.The dominant deformation mechanism responsible for the high strain rate superplasticity is still grain boundary sliding(GBS),and the dislocation creep mechanism is considered as the main accommodation mechanism. 关键词：AZ91镁合金超塑性晶体边界活动应变速度

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High strain rate superplasticity of rolled AZ91 magnesium alloy

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