朱利敏,李全安,张清,陈晓亚,王颂博

• 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:西安理工大学材料科学与工程学院

摘要(Abstract)：

研究了Mg-8Gd-0.5Zr和Mg-8Gd-3Sm-0.5Zr两种镁合金在变形温度350～500℃、应变速率0.002～0.1 s~(-1)条件下的热压缩行为,并对两种合金的流变应力以及热变形激活能进行分析计算。结果表明:由于添加了稀土元素Sm,Mg-8Gd-3Sm-0.5Zr合金的流变应力显著增加,其热变形激活能为213.69 kJ/mol,高于Mg-8Gd-0.5Zr合金的激活能(202.98 kJ/mol);当变形温度超过400℃时,两种合金都发生了明显的动态再结晶,由于Sm的加入,使Mg-8Gd-3Sm-0.5Zr合金动态再结晶晶粒尺寸显著减小,在500℃热压缩后,Mg-8Gd-3Sm-0.5Zr合金的动态再结晶晶粒平均尺寸为10μm。

关键词(KeyWords)： Sm;热变形;动态再结晶;变形激活能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084,51171059)

作者(Author): 朱利敏,李全安,张清,陈晓亚,王颂博

DOI: 10.13289/j.issn.1009-6264.2018-0481

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