朱利敏,李全安,陈晓亚

• 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)：

采用铸造法制备了Mg-8Gd-0.5Zr合金,对合金分别进行固溶处理(T4)及固溶+时效处理(T6),在应变速率0.002~0.1 s~(-1)、变形温度350~500℃、最大变形量50%条件下,对不同热处理后的合金进行热压缩变形实验,分析合金在不同变形条件下的真应力-真应变曲线、激活能及组织变化,研究热处理对热压缩行为的影响。结果表明:合金时效过程中析出β'-Mg_5Gd相,使热变形过程中峰值应力升高,激活能增加,T6态合金变形激活能(221.605 k J/mol)高于T4态合金(202.986 kJ/mol);在同样热压缩实验条件下,T6态合金热压缩过程中再结晶开始时间延迟,再结晶晶粒更细小,500℃热压缩后再结晶平均晶粒尺寸为15μm。

关键词(KeyWords)： Mg-8Gd-0.5Zr合金;变形激活能;再结晶;固溶时效处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171059,51571084);; 河南省重点科技攻关项目(152102210072)

作者(Author): 朱利敏,李全安,陈晓亚

DOI: 10.13289/j.issn.1009-6264.2017-0415

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