王颂博,李全安,陈晓亚,张帅,关海昆

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:西安理工大学材料科学与工程学院

摘要(Abstract)：

采用X射线衍射仪、光学显微镜以及扫描电镜对铸态Mg-11Gd-3Y-xZn-0.5Zr合金显微组织进行观察分析,用拉伸试验机及布氏硬度计对合金力学性能进行测试,结果表明:铸态Mg-11Gd-3Y-0.5Zr合金的组织主要由α-Mg基体、Mg_5(Gd,Y)相和Mg_(24)(Gd,Y)_5相组成,晶粒较为粗大;在加入Zn元素后,合金由α-Mg基体、Mg_5(Gd,Y,Zn)相以及Mg_(12)Zn(Gd,Y)相组成;随着Zn元素加入量的增加,合金的晶粒先细化再粗化,抗拉强度、伸长率和布氏硬度值先升高后降低,当Zn含量为1.1%时,合金的抗拉强度、伸长率和布氏硬度达到最高值,分别为216.9 MPa、4.74%和84.37 HBW,合金的主要强化相为Mg_(12)Zn(Gd,Y)相,强化机制主要为细晶强化。

关键词(KeyWords)： Mg-Gd-Y-Zr合金;Zn;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084,51171059)

作者(Author): 王颂博,李全安,陈晓亚,张帅,关海昆

DOI: 10.13289/j.issn.1009-6264.2019-0007

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