挤压态AZ31镁合金的预处理及恒应变速率下压缩超塑性研究  

Study on pretreatment and compression superplasticity under constant strain rate of extruded AZ31 Mg alloy

作　　者：王超[1] 林飞[1] 赵洪生[2] 孟庆森[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]太原理工大学机械工程学院,山西太原030024

出　　处：《兵器材料科学与工程》2009年第5期36-39,共4页Ordnance Material Science and Engineering

基　　金：陕西省留学归国人员科研资助项目"计算机辅助镁合金超塑性成形技术的研究"(项目编号:12908764)

摘　　要：利用Gleeble1500热模拟试验机等试验设备,对挤压态AZ31镁合金进行预处理及高/恒应变速率下压缩超塑性研究。研究表明,挤压态镁合金在温度300℃,保温时间30 min为晶粒细化的较佳温度和保温时间,同时在300℃,应变速率为0.01～10 s-1的条件下进行压缩试验,外缘圆周伸长率均超过158.3%,压缩真应变达1.898以上,实现了高应变速率下的压缩超塑性。By using testing facilities,such as Gleeblel500 thermal simulator,the research of pretreatment and high/constant compression superplasticity for the extrued AZ31 magnesium alloy was conducted in this paper. The study shows the pretreatment process of holding for 30 minutes at 300℃ is in favor of grain refinement. And under this condition, AZ31 magnesium alloy achieves compression superplasticity at a high/constant strain rate ranging from 0.01 to 10 s^-1, the elongation of outer circumference is beyond 158.3 percent and the compression strain is more than 1.898.

关 键 词：AZ31 细化晶粒 加热工艺 恒/高应变速率 压缩超塑性 

分 类 号：TG3[金属学及工艺—金属压力加工]