Effects of samarium on microstructure and mechanical properties of Mg-Al-Ca alloys

被引：5
|
作者：
Son, H. T. [1 ]
Lee, J. S. [1 ]
Kim, Y. K. [1 ]
Oh, I. H. [1 ]
Yoshimi, K. [2 ]
Maruyama, K. [2 ]
机构：
[1] Korea Inst Ind Technol, Chumdan POB 1,Wolgyedong, Kwangju 506824, South Korea
[2] Tohoku Univ, Grad Sch Environm Studies, Dept Environm Studies, Sendai, Miyagi 980, Japan
来源：
ECO-MATERIALS PROCESSING AND DESIGN VIII | 2007年 / 544-545卷
关键词：
Mg-Al-Ca alloy; samarium; rear-earth elements;
D O I：
10.4028/www.scientific.net/MSF.544-545.295
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
As samarium addition was increased, alpha- Mg matrix morphology was changed from dendritic to equiaxed grains and average value of grain size was decreased from 101.6 mu m to 39.3 mu m. Samarium addition to Mg-5Al-3Ca based alloys resulted in the formation of Mg-Al-Sm thernary intermetallic compounds at grain boundarys and alpha-Mg matrix grains. In these alloys, two kinds of eutectic structure were observed; coarse irregular-shape structure at grain boundary and fine needle-shape structure in the a-Mg matrix grain. It is found that the yield strength and ultimate strength showed the maximum value of 109.1MPa and 139.3 at Mg-5Al-3Ca-2Sm alloy, respectively.
引用
收藏
页码：295 / +
页数：2
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