夏卿坤,刘志义,王恒,刘煜,许晓嫦

• 1:长沙大学机电工程系
• 2:中南大学材料科学与工程学院

摘要(Abstract)：

通过对不同热暴露制度下2A12铝合金的常温拉伸力学性能测试和微观组织演变的观察,分析热暴露制度对预变形该铝合金微观组织和性能的影响。结果表明在120℃热暴露500 h后2A12合金力学性能提升,热暴露温度提高到160℃、200℃,合金性能直线下降。200℃热暴露100 h时合金强度损失严重,之后缓慢下降。T8态合金中S相的尺寸比T6态更加均匀,粗化速率更低。T8态合金由于大量位错的诱导,溶质充分析出,基体浓度已经降低到一定程度。而T6态合金基体浓度高于T8态合金,加之较小相体的溶解可以提供溶质,其S相更容易粗化,进而降低了合金强度。

关键词(KeyWords)： 2A12合金;热暴露;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171209);; 湖南省重点建设学科资助;; 长沙市科技计划项目(K1205050-11);; 湖南省科技计划项目(2013FJ3059)

作者(Author): 夏卿坤,刘志义,王恒,刘煜,许晓嫦

DOI: 10.13289/j.issn.1009-6264.2013.10.014

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