谢卫东,王春光,宁旭,党春梅,彭晓东,魏群义

• 1:重庆大学材料科学与工程学院
• 2:国家镁合金材料工程技术研究中心

摘要(Abstract)：

制备了不同Y含量的Mg-5Al-1Sr-2Ca-xY(x=0,1,2,5)合金试样,采用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、材料试验机等观察测试合金的微观组织和力学性能。结果表明,未添加Y时,合金晶粒大小不均匀,且多呈柱状,晶内有较多的点状化合物;Y含量1%时,晶粒细化、球化且大小较均匀;Y含量2%时,晶粒趋于柱状;Y含量5%时,晶粒形状不规则、大小极不均匀。随Y含量的增加,室温和高温力学性能呈先升后降趋势,最高点为Y含量1%,其室温和高温抗拉强度分别较无Y合金提高了约33.8%和25.4%。

关键词(KeyWords)： Y;Ca;镁合金;晶粒细化

Abstract:

Keywords:

基金项目(Foundation): 重庆市科技计划项目(2008BB4323,2009AC4059,2009AB4009);; 国家“973”计划项目(2007CB613700);; 重庆大学研究生科技创新基金项目(CDJXS10130007)

作者(Author): 谢卫东,王春光,宁旭,党春梅,彭晓东,魏群义

DOI: 10.13289/j.issn.1009-6264.2012.01.023

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