Microstructure and creep property of as-cast Mg-6Al-XSr(x=0, 2, 3) alloys

被引：1

作者：

Wu, Yufeng ^{[1
]}

Du, Wenbo ^{[2
]}

Zhang, Yinan ^{[2
]}

Zuo, Tieyong ^{[1
]}

机构：

[1] Beijing Univ Technol, Inst Recycling Econ 1, Beijing, Peoples R China

[2] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing, Peoples R China

来源：

MATERIALS AND DESIGN, PTS 1-3 | 2011年 / 284-286卷

关键词：

magnesium alloy; Sr; creep; grain boundaries sliding; dislocation motion;

D O I：

10.4028/www.scientific.net/AMR.284-286.1564

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and creep property of as-cast Mg-6Al-xSr(x=0, 2,3) alloys were studied. Results showed that the branch-like Al4Sr phase is the main precipitating phase in these alloys containing Sr. Their secondary creep rates under the applied stress of 70MPa at 175 degrees C decreased with the increasing in the content of Sr and reached the minimum value of 1.4 X 10(-8)s(-1) in the Mg-6Al-3Sr alloy, which is one thirtieth of secondary creep rates of the Mg-6Al alloy. It was mainly attributed to Al4Sr, which effectively hindered the grain boundaries sliding and dislocation motion in the creep.

引用

页码：1564 / +

页数：2

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