程永奇,陈振华,夏伟军

• 1:湖南大学材料科学与工程学院
• 2:湖南大学材料科学与工程学院
• 3:湖南大学材料科学与工程学院 湖南长沙410082
• 4:湖南长沙410082

摘要(Abstract)：

通过显微组织分析和力学性能测试对退火处理后等径角轧制AZ31镁合金板材进行了研究,在试验条件下,退火处理后板材中原有的非基面晶粒取向未发生明显改变;随着退火时间的延长,退火温度的升高,晶粒逐渐趋于均匀、等轴化并发生长大,孪晶消失,抗拉强度和屈服强度逐渐降低,断裂伸长率明显提高,各向异性减弱。这表明,孪晶的存在及晶粒粗化导致板材的塑性降低,而非基面晶粒取向和均匀等轴化的晶粒组织则有利于其塑性的提高,明显的屈服现象、低的屈服强度和大的应变硬化现象可归因于板材内(0002)基面晶粒取向的减弱。

关键词(KeyWords)： AZ31镁合金板材;退火处理;显微组织;力学性能;等径角轧制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50674043);; 湖南省科技重大专项计划资助项目(04GK10081)

作者(Author): 程永奇,陈振华,夏伟军

参考文献(References)：

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