含钇Mg-6Al镁合金组织和高温力学性能  

Microstructure and high-temperature mechanical properties of Mg-6Al magnesium alloy containing yttrium

作　　者：李全安[1] 李建弘[1] 谢建昌[1] 李克杰[1,2] 张兴渊[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《材料热处理学报》2009年第3期127-131,共5页Transactions of Materials and Heat Treatment

基　　金：河南省杰出人才计划项目(084200510018);洛阳市科技攻关项目(0602018A)

摘　　要：研究了稀土元素Y（0～2．4wt％）对Mg-6Al合金显微组织和力学性能的影响。结果表明，添加稀土元素Y可以显著提高时效态合金从室温至200℃区间的拉伸屈服强度和抗拉强度。在Mg-6Al合金中加入0．6wt％～2．4wt％的Y后，合金的显微组织均得到细化，Al2Y高熔点点状稀土合金相产生。在本研究的范围内，加入1．2wt％Y的合金从组织到性能各项性能最优。Effects of adding rare-earth Y in Mg-6Al alloy on its microstructure and high-temperature mechanical properties were investigated. The results show that addition of Y in Mg-6Al alloy dramatically enhances yield strength and tensile strength at 20℃ - 200℃ for the alloy under aged state. Adding 0.6wt% - 2.4wt% Y, the microstructure of the aged Mg-Al alloy is remarkably refined, and dot-like Al2Y phase with high melting-point forms in the alloy. The optimal microstructure and mechanical properties of the Mg-6Al alloy with 1.2wt% Y are obtained in this study.

关 键 词：钇 镁合金 高温力学性能 显微组织 

分 类 号：TG146.22[一般工业技术—材料科学与工程]