An investigation of second phases in as-cast AZ31 magnesium alloys with different Sr contents

被引：0
|
作者：
Lu Wu
Fusheng Pan
Mingbo Yang
Renju Cheng
机构：
[1] Chongqing University,National Engineering Research Center for Magnesium Alloys
[2] Chongqing Academy of Science and Technology,Materials Science & Engineering College
[3] Chongqing University of Technology,undefined
来源：
Journal of Materials Science | 2013年 / 48卷
关键词：
Magnesium Alloy; AZ31 Alloy; Experimental Alloy; Mg17Al12 Phase; 17Sr2 Phase;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Second phases in the AZ31 as-cast magnesium alloys with different Sr contents (0, 0.1, 0.5, 1.0, 2.0, and 5.0 wt%) were investigated using scanning electron microscopy, energy dispersive spectrometry, differential scanning calorimetry, X-ray diffraction, and transmission electron microscopy. The results indicated that the Mg21(Zn, Al)17 phase with small amount was formed in the AZ31 as-cast alloy without Sr addition, in addition to the Mg17Al12 phase. At the same time, the alloy with the addition of 0.1 wt% Sr mainly consisted of the α-Mg, Mg17Al12, Mg21(Zn, Al)17, and Al4Sr phases. In addition, the α-Mg, Mg21(Zn, Al)17 and Al4Sr phases were found to be the main second phases for the alloy with the addition of 0.5 wt% Sr. However, only the α-Mg, Al4Sr and (Mg, Al)17Sr2 phases were mainly formed in the AZ31 alloy with the addition of 1.0 wt% Sr. As for the alloys with the additions of 2 and 5 wt% Sr, their as-cast microstructures were mainly composed of the α-Mg and (Mg, Al)17Sr2 phases.
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页码：5456 / 5469
页数：13
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