朱利敏,李全安,陈晓亚,张清

• 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:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

利用铸造法制备了Mg-8Gd-(0,3)Sm-0.5Zr合金，并进行了525℃均匀化处理8 h,随后在温度为350～500℃及应变速率为0.002～1 s~(-1)的条件下进行热压缩试验，绘制并分析合金热压缩后的真应力-真应变曲线，构建其动态再结晶生长动力学双参数模型，并分析了合金生长动力学曲线特点及显微组织特征。结果表明：两种合金在热压缩时均发生了动态再结晶，通过双参数模型绘制动态再结晶动力学曲线，发现在高温低应变速率热压缩时，在真应变约0.2时，合金的动态再结晶的体积分数迅速增加至90%以上。对比分析Sm元素添加后的动态再结晶动力学曲线，发现Sm元素促进动态再结晶的进行，尤其在高温低应变速率热压缩时，在变形初期Sm的促进作用更明显。

关键词(KeyWords)： Mg-8Gd-(0,3)Sm-0.5Zr合金;热压缩;动态再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084);; 河南省自然科学基金面上项目(222300420435)

作者(Author): 朱利敏,李全安,陈晓亚,张清

DOI: 10.13289/j.issn.1009-6264.2023-0216

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