Superplasticity enhanced by two-stage deformation in a hot-extruded AZ61 magnesium alloy

被引：0
|
作者：
Wang, YN [1 ]
Huang, JC
机构：
[1] Dalian Univ Technol, Dept Mat Engn, Dalian 116024, Peoples R China
[2] Natl Sun Yat Sen Univ, Inst Mat Sci & Engn, Kaohsiung 804, Taiwan
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2005年 / 21卷 / 01期
关键词：
AZ61 magnesium alloy; superplasticity; dynamic recrystallization; grain boundary sliding;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A two-stage strain rate deformation method is proposed to enhance the superplasticity in a hot extruded AZ61 alloy. In the stage-one of deformation, a relatively high strain rate was applied in order to obtain fine grains through dynamic recrystallization. The optimum strain rate for DRX at 300degreesC was identified as similar to5x10(-3) s(-1). Stage-two is conducted at relatively low strain rate in order to utilize the fine grains refined by DRX during stage-one to make the grain boundary sliding operate more smoothly, which resulting in enhanced superplastic elongation from 350% to 440%.
引用
收藏
页码：71 / 74
页数：4
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