Effect of strontium on the microstructure and mechanical properties of AZ31 magnesium alloy

被引：0

作者：

Wang, YX ^{[1
]}

Zeng, XQ ^{[1
]}

Ding, WJ ^{[1
]}

Luo, AA ^{[1
]}

Sachdev, AK ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200030, Peoples R China

来源：

MAGNESIUM TECHNOLOGY 2005 | 2005年

关键词：

microstructure; grain refinement; mechanical properties; AZ31; magnesium alloy;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of strontium on the microstructure and mechanical properties of AZ31 magnesium alloy, and its sensitivity to casting section thickness are investigated. Three phases, block-shaped Mg17Al12, acicular Mg20Al20Mn5Sr and insular Mg-16(Al,Zn)(2)Sr, are identified in the Sr-containing AZ31 alloys. Although decreasing casting thickness decreases the grain size due to an increase in cooling rate, the Sr addition provides a greater effect for additions less than 0.5%. Higher levels of Sr lead to the formation of the Mg-16(Al,Zn)(2)Sr phase which consumes the Sr and precludes its effect on refining the grain size. The mechanical properties of as-cast AZ31 magnesium alloy are improved by the Sr grain refinement, although the elongation decreases with the formation of the Mg-16(Al,Zn)(2)Sr phase. An optimum Sr addition between 0.01 and 0.1% is recommended.

引用

页码：85 / 89

页数：5

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