王忠堂,张宏亮,王明浩,李艳娟,杨君宝

• 1:沈阳理工大学材料科学与工程学院

摘要(Abstract)：

采用扫描电镜(SEM)研究了挤压态镁合金压痕—压平复合变形过程中动态再结晶及孪晶组织演变规律。结果表明:在镁合金压痕—压平复合变形过程中,随着复合变形系数和变形温度的增加,AZ31镁合金的孪晶数量逐渐增多,动态再结晶程度增大,晶粒细化效果明显。动态再结晶的主要形核之处是原始晶粒的晶界处,动态再结晶新晶粒产生于原始晶粒的晶界处,且形状为典型的项链状结构,孪晶界也是动态再结晶的有利形核位置。在压痕-压平复合变形过程中,较低的变形温度和较大的变形程度有利于孪晶组织的形成,且孪晶组织容易出现在大晶粒内部。

关键词(KeyWords)： AZ31镁合金;压痕—压平复合变形;动态再结晶;孪晶组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575366);; 辽宁省教育厅资助项目(LG201701)

作者(Author): 王忠堂,张宏亮,王明浩,李艳娟,杨君宝

DOI: 10.13289/j.issn.1009-6264.2019-0354

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