Effects of zirconium addition on as-cast microstructure and mechanical properties of Mg–3Sn–2Ca magnesium alloy

详细信息    查看全文

• 作者：Mingbo Yang^a ; ^b ; ^c ; ^{yangmingbo@cqut.edu.cn} ; Xiaofeng Liang^a ; Zhu Yi^a ; Fusheng Pan^c
• 关键词：A. Non-ferrous metals and alloys ; C. Casting ; F. Microstructure
• 刊名：Materials and Design
• 出版年：2011
• 出版时间：April 2011
• 年：2011
• 卷：32
• 期：4
• 页码：1967-1973
• 全文大小：1937 K

文摘

At present, the mechanical properties of the Mg–3Sn–2Ca magnesium alloy are not satisfying and further enhance needs to be considered via further alloying/microalloying additions. The effects of Zr addition on the as-cast microstructure and mechanical properties of the alloy were investigated by using optical and electron microscopies, differential scanning calorimetry (DSC) analysis, and tensile and creep tests. The results indicate that adding 0.41, 0.76 or 1.18 wt. % Zr can refine the grains of the alloy, and the primary CaMgSn phases in the Zr-containing alloys are changed from coarse needle-like net to relatively fine short block and/or particle-like shapes. As a result, the tensile and/or creep properties of the Zr-containing alloys are improved. Among the Zr-containing alloys, the alloy with the addition of 0.76 wt. % Zr exhibits the relatively optimum mechanical properties.