AZ31镁合金超塑性拉伸载荷失稳的临界应变量  

Critical Strain of Load Instability Under Super-plastical Tensile Test of AZ31 Alloy

作　　者：张诗昌[1] 陈伟[1] 胡衍生[1] 

机构地区：[1]武汉科技大学钢铁冶金与资源利用教育部重点实验室,湖北武汉430081

出　　处：《热加工工艺》2009年第10期16-17,21,共3页Hot Working Technology

基　　金：湖北省教育厅重点项目(Z200511007)

摘　　要：在温度为380～460℃、应变速率为10-3～10-4s-1的条件下,测定了AZ31镁合金超塑性拉伸载荷失稳的临界应变量。结果表明,随着温度升高或应变速率降低,载荷失稳的临界应变量增加,并在载荷-应变曲线上出现稳定最大载荷区。The critical strain of load instability under super-plastical tensile test of AZ31 alloy was measured at temperature ranging from 380℃ to 460℃ and strain rate ranging from 10^-3 s-1 to 10-^4s^-1. The results show that a region of stable maximum load appears and the critical strain increases with the increase of temperature or decrease of strain rate.

关 键 词：AZ31镁合金 超塑性 载荷失稳 

分 类 号：TG146.22[一般工业技术—材料科学与工程]