刘明明,李全安,陈晓亚,陈君,陈培军,谭劲峰,李向宇

• 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
• 3:洛阳晟雅镁合金科技有限公司
• 4:中铝洛阳铜加工有限公司

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射仪和电子拉伸试验机等研究了不同热处理对Mg-10Y-1Zn-0.5Zr合金的微观组织和力学性能的影响。结果表明：铸态Mg-10Y-1Zn-0.5Zr合金组织主要由α-Mg基体、Mg_3Y_2Zn_3(W)相以及Mg_(10)YZn(18R-LPSO)相构成；固溶处理后，LPSO相从18R型转变为14H型LPSO(Mg_(12)YZn),固溶态合金组织主要由α-Mg基体和Mg_(12)YZn(14H-LPSO)相组成；时效处理后，合金组织主要由α-Mg基体、Mg_3Y_2Zn_3(W)相和Mg_(12)YZn(14H-LPSO)相组成。Mg-10Y-1Zn-0.5Zr合金的最佳热处理工艺为500℃固溶12 h+225℃时效80 h;此时合金的极限抗拉强度和屈服强度由铸态的185.83 MPa和116.25 MPa增加到269.53 MPa和162.76 MPa,伸长率由8.21%升高到15.66%。

关键词(KeyWords)： Mg-Y-Zn-Zr合金;LPSO相;微观组织;力学性能;热处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084);; 中原英才计划—中原青年拔尖人才(豫组通[2021]44号);; 河南省自然科学基金(222300420435)

作者(Author): 刘明明,李全安,陈晓亚,陈君,陈培军,谭劲峰,李向宇

DOI: 10.13289/j.issn.1009-6264.2021-0607

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