田董扩;李振亮;

• 1:内蒙古科技大学材料与冶金学院

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摘要(Abstract)：

研究了变形温度对AZ80镁合金微观组织演化的影响,利用电子背散射衍射(EBSD)技术观察分析了不同变形温度变形后的AZ80镁合金微观组织.结果表明:与400℃变形温度相对比,350℃时平均晶粒尺寸减小,平均晶粒形状纵横比减小,更有利于提高材料的塑性和强度.变形温度350℃时,小角度晶界增多,导致再结晶分数减小;几何必须位错密度增大,促使流变应力峰值增大;Schmid 因子硬取向分数增加,促进基面织构得到强化.变形温度为400℃时主要为■柱面织构,变形温度为350℃时主要为■基面织构.

关键词(KeyWords)： AZ80;EBSD;晶界;取向差;几何必须位错密度

基金项目(Foundation): 国家自然科学基金资助项目(51364032);; 内蒙古自治区自然科学基金资助项目(2018MS05039)

作者(Author): 田董扩;李振亮;

Email:

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