Mg-9Al-xSr合金的高温性能Properties of Mg-9Al-xSr at elevated temperature
范晋平,许并社,王社斌,刘璐
摘要(Abstract)：
在ZRR-M10型真空电阻炉中制备了3种不同锶添加量的Mg-9Al-xSr镁合金试样。用金相显微镜、X射线衍射仪以及WE230型加载高温炉的液压万能拉伸机机等分析了不同锶添加量对Mg-9Al-xSr镁合金组织及高温力学性能的影响。结果表明:合金中的锶元素主要分布于枝晶界,锶元素的添加能够明显细化合金组织,随着锶添加量的进一步增加,合金进一步得到细化,但细化效果有所减弱;随着锶添加量的增加,合金的相组成不同,主要的相组成分别为α-Mg+Al4Sr,α-Mg+Al4Sr+Al2Sr及α-Mg+Al2 Sr;适量锶的添加能有效改善合金常温及高温性能,随着锶添加量的增加,合金中的脆性铝锶析出相的增多,合金性能呈下降趋势变化。
关键词(KeyWords)： 镁合金;锶;微观组织;高温性能
基金项目(Foundation): 国家自然科学基金(2010jc13);; 山西省归国留学人员科研项目(2008-39)
作者(Author): 范晋平,许并社,王社斌,刘璐
DOI: 10.13289/j.issn.1009-6264.2011.s1.017
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