Effects of minor Zr and Sr on as-cast microstructure and mechanical properties of Mg–3Ce–1.2Mn–0.9Sc (wt. % ) magnesium alloy

详细信息    查看全文

• 作者：Fusheng Pan^a ; Mingbo Yang^a ; ^b ; ^{yangmingbo@cqut.edu.cn} ; Jia Shen^c ; Lu Wu^a
• 关键词：Magnesium alloy ; Mg&#x2013 ; Ce&#x2013 ; Mn&#x2013 ; Sc alloy ; Grain refinement ; Zr and Sr additions
• 刊名：Materials Science and Engineering: A
• 出版年：2011
• 出版时间：25 May 2011
• 年：2011
• 卷：528
• 期：13-14
• 页码：4292-4299
• 全文大小：2550 K

文摘

The effects of minor Zr and Sr on the as-cast microstructure and mechanical properties of the Mg–3Ce–1.2Mn–0.9Sc (wt. % ) alloy were investigated by using optical and electron microscopies, differential scanning calorimetry (DSC) analysis, and tensile and creep tests. The results indicate that adding minor Zr and/or Sr to the Mg–3Ce–1.2Mn–0.9Sc alloy does not cause an obvious change in the morphology and distribution of the Mg₁₂Ce phase. However, the grains of the Zr and/or Sr-containing alloys are effectively refined. Among the Zr and/or Sr-containing alloys, the grains of the alloy with the addition of 0.5 wt. % Zr + 0.1 wt. % Sr are the finest, followed by the alloys with the additions of 0.5 wt. % Zr and 0.1 wt. % Sr, respectively. In addition, small additions of Zr and/or Sr can improve the tensile and creep properties of the Mg–3Ce–1.2Mn–0.9Sc alloy. Among the Zr and/or Sr-containing alloys, the alloy with the addition of 0.5 wt. % Zr + 0.1 wt. % Sr obtains the optimum tensile and creep properties.