刘亚,文九巴,李欢,贺俊光

• 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:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

采用X射线衍射(XRD)、光学显微镜(OM)和扫描电镜(SEM)等研究了Y含量对铸态Mg-1.8Zn-1.8Gd-xY-0.4Zr合金的组织、力学性能和耐腐蚀性能的影响。结果表明:合金的组织主要由α-Mg基体、(Mg, Zn)_3(Gd, Y)相、Mg_(12)Zn(Gd, Y)相以及Mg_3Zn_3(Gd, Y)_2相组成;随着Y含量的增加,Mg_(12)Zn(Gd, Y)相逐渐增多。当Y含量在1～4 mass%范围内,合金的力学性能及耐腐蚀性能均呈先上升后下降趋势,在Y含量为2 mass%时,Mg-1.8Zn-1.8Gd-2Y-0.4Zr合金的综合性能较好,其抗拉强度达最大值,为(187.4±5.6)MPa,屈服强度和伸长率分别为(101.8±4.5)MPa和(16.7±0.9)%,质量损失腐蚀速率达最小值,为0.859 mm/year。

关键词(KeyWords)： Mg-Zn-Gd-Y-Zr合金;微观组织;力学性能;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 河南省高校科技创新人才支持计划项目(17HASTIT026)

作者(Author): 刘亚,文九巴,李欢,贺俊光

DOI: 10.13289/j.issn.1009-6264.2021-0205

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