王聪,李全安,陈晓亚,张娜娜,史浩鹏

• 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
• 3:龙门实验室

摘要(Abstract)：

采用光学显微镜、X射线衍射仪、扫描电镜以及电子拉伸试验机等研究了不同热处理工艺及Zn元素对Mg-10Gd-3Sm(-1Zn)-0.5Zr(mass%)合金微观组织和力学性能的影响。结果表明：Zn元素的加入可以有效细化晶粒，促进第二相的析出，并生成一种新相(Mg, Zn)_3(Sm, Gd)_1;Mg-10Gd-3Sm(-1Zn)-0.5Zr合金的最佳热处理工艺为515℃×6 h固溶及225℃×10 h时效处理；对其进行室温和高温拉伸，发现随着温度的升高，时效态Mg-10Gd-3Sm(-1Zn)-0.5Zr合金的抗拉强度表现出先增大后减小的趋势；Zn的加入使合金的抗拉强度和伸长率明显高于基体合金，表现出优异的力学性能；两种合金在室温和高温下的断裂机制均属于脆性断裂，不含Zn的基体合金脆性特征更为明显，塑性较差，而含Zn的合金断口形貌中撕裂棱和解理刻面数目较多，塑性较高。

关键词(KeyWords)： Mg-10Gd-3Sm-1Zn-0.5Zr合金;固溶处理;时效处理;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52371108,52201119);; 龙门实验室前沿探索课题(LMQYTSKT014);; 河南省科技研发计划联合基金(242103810056)

作者(Author): 王聪,李全安,陈晓亚,张娜娜,史浩鹏

DOI: 10.13289/j.issn.1009-6264.2024-0515

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