孙瑞雪,陈君,陈晓亚,李全安,兖利鹏

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射仪和拉伸试验机等研究了不同热处理状态下Mg-12Gd-1Zn-0.5Zr合金的物相、显微组织和力学性能。结果表明:铸态Mg-12Gd-1Zn-0.5Zr合金的组织主要由α-Mg基体、Mg_5(Gd, Zn)、Mg_5Gd以及Mg_(10)ZnGd(18R-LPSO)相构成。固溶处理后,LPSO相从18R型LPSO转变为14H型LPSO(Mg_(12)ZnGd),时效处理后,合金的组织主要由α-Mg基体、Mg_5Gd和Mg_(12)ZnGd相组成;Mg-12Gd-1Zn-0.5Zr合金的最佳热处理工艺为500℃固溶处理10 h+225℃时效12 h,此时合金的抗拉强度和屈服强度由铸态的192.16和110.24 MPa增加到243.10和159.36 MPa,伸长率由12.64%降低到11.66%。

关键词(KeyWords)： Mg-12Gd-1Zn-0.5Zr合金;热处理;LPSO相;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084)

作者(Author): 孙瑞雪,陈君,陈晓亚,李全安,兖利鹏

DOI: 10.13289/j.issn.1009-6264.2021-0402

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