Zhang Shichang 1 Cai Qizhou 2 Wang Lishi 2 Wei Bokang 2. Mechanical Properties of Die Cast AZ91Mg Alloy Containing Y and MM RE at Elevated Temperatures[J]. Special Casting & Nonferrous Alloys, 2005,(5):287-290.
Zhang Shichang 1 Cai Qizhou 2 Wang Lishi 2 Wei Bokang 2. Mechanical Properties of Die Cast AZ91Mg Alloy Containing Y and MM RE at Elevated Temperatures[J]. Special Casting & Nonferrous Alloys, 2005,(5):287-290.DOI：
The tensile test at elevated temperatures show that either die cast AZ91 containing 1%Y or 1%MM Mg alloy has the higher strength than AZ91
in which the strength of AZ91 containing 1%Y is the higher than that of AZ91 containing 1%MM.The AZ91 Mg alloy was enhanced due to both the formation of polygonal Al
2
Y in AZ91 Mg alloy containing 1%Y and the formation of rod like Al
4
（Ce
La） in AZ91 containing 1%MM possessing higher thermal stability and microhardness.By friedel model
the critical stress σ
c
for a dislocation moving from the resistant Y atom or Ce atom was calculated in both AZ91 containing 1%Y and AZ91 containing 1%MM alloy.The calculation reveals that the σ
c
of die cast AZ91 containing Y is higher than that of die cast AZ91 containing MM
resulting in higher strength of AZ91 containing Y than that of AZ91 containing MM.
关键词
压铸镁合金钇及混合稀土高温性能
Keywords
Die Cast Mg AlloyY and Mistchmetal（MM）Mechanical Properties at Elevated Temperature
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