史浩鹏,李全安,陈晓亚,戚尧

• 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

摘要(Abstract)：

采用熔炼铸造法制备了添加0%～2%Zn(质量分数)的Mg-10Gd-3Sm-0.5Zr合金,对其固溶处理后进行热压缩试验,研究合金在温度350～500℃,应变速率0.002～1 s~(-1),最大变形量70%条件下的热变形行为,计算了其热变形激活能,建立了合金的热压缩变形本构方程和热加工图并进行了分析。结果表明:加入Zn元素后,合金的峰值应力先升高后减小,加入1%Zn元素的峰值应力最高;未添加Zn的合金的热激活能为256.87 kJ/mol,加入1%Zn后合金的热激活能为290.45 kJ/mol;添加Zn元素后,合金的热加工图失稳区减小,可加工面积增大,高温时热压缩的组织更加细小均匀。

关键词(KeyWords)： Mg-10Gd-3Sm-0.5Zr合金;Zn;变形激活能;本构方程;加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084)

作者(Author): 史浩鹏,李全安,陈晓亚,戚尧

DOI: 10.13289/j.issn.1009-6264.2021-0052

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