Comparison of as-cast microstructure, tensile and creep properties for Mg-3Sn-1Ca and Mg-3Sn-2Ca magnesium alloys

被引：17

作者：

Yang Ming-bo ^{[1
,2
]}

Cheng Liang ^{[1
]}

Pan Fu-sheng ^{[2
]}

机构：

[1] Chongqing Univ Technol, Mat Sci & Engn Coll, Chongqing 400050, Peoples R China

[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400045, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷 / 04期

基金：

中国国家自然科学基金;

关键词：

magnesium alloy; CaMgSn phase; Sn; Ca; mechanical properties; HOT-WORKING; MG; BEHAVIOR; MECHANISMS; PARAMETERS;

D O I：

10.1016/S1003-6326(09)60182-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The as-cast microstructure, tensile and creep properties of Mg-3Sn-1Ca and Mg-3Sn-2Ca magnesium alloys were investigated and compared by using optical microscopy and scanning electron microscopy, X-ray diffraction analysis and tensile tests. The results indicate that the as-cast microstructures of Mg-3Sn-1Ca and Mg-3Sn-2Ca alloys are different. The former is mainly composed of alpha-Mg, eutectic CaMgSn and solid state precipitation of Mg2Sn, whereas the latter is mainly composed of alpha-Mg, primary CaMgSn, eutectic CaMgSn and Mg2Ca phases. As a result, the two alloys obtain different tensile and creep properties. Mg-3Sn-1Ca alloy shows relatively higher ultimate tensile strength and elongation at room temperature and 150 degrees C than Mg-3Sn-2Ca alloy, however, the yield strengths of Mg-3Sn-1Ca alloy at room temperature and 150 degrees C are relatively low. In addition, the creep properties of Mg-3Sn-1Ca alloy at 150 degrees C and 70 MPa for 100 h are obviously lower than those of the Mg-3Sn-2Ca alloy.

引用

页码：584 / 589

页数：6

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