Microstructure, tensile properties and compressive creep resistance of Mg-(5-8.5)%Sn-2%La alloys

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：章晓萍 陈云贵 肖素芬 唐永柏 牛高 魏尚海 赵源华

文章页码：299 - 305

Key words：Mg-Sn-La alloy; microstructure; tensile properties; compressive creep behavior

Abstract: The microstructure, tensile properties and compressive creep resistance of permanent-mould cast Mg-(5-8.5)%Sn-2%La (mass fraction) alloys were investigated. The results show that Mg-(5-8.5)%Sn-2%La alloys are all composed of α-Mg phase, Mg₂Sn and Mg-La-Sn compounds. Compared with those of Mg-5%Sn binary alloy, the grain size and the content of Mg₂Sn compound in Mg-5%Sn-2%La alloy are decreased. With the increase of Sn content in Mg-(5-8.5)%Sn-2%La alloys, the content of Mg₂Sn compound increases, while that of Mg-Sn-La compound changes little. In addition, the investigation suggests that the thermally stable Mg-Sn-La and Mg₂Sn compounds can improve the tensile properties and compressive creep resistance of the alloys.