吕青,刘志义,段水亮,李尧

• 1:中南大学材料科学与工程学院

摘要(Abstract)：

通过常温力学性能测试和透射电镜对含微量Ag的Al-Zn-Mg-Cu合金的组织性能进行了研究。结果表明,相对于20℃水淬,在空气淬火条件下由于淬火速率的降低,不含银合金和含银合金试样的抗拉强度降幅分别为20.8%和14.4%。透射电镜观察表明,空气淬火条件下,合金在淬火过程中析出的晶内粗大η相是导致合金力学性能下降的主要原因。研究表明,Ag与空位较高的结合能抑制了淬火过程中原子的扩散及晶内粗大η相的形成,减小了合金因淬火速率下降而造成的强度损失。

关键词(KeyWords)： Al-Zn-Mg-Cu合金;淬火介质;淬火速率;Ag

Abstract:

Keywords:

基金项目(Foundation): 国家“973”重点基础研究发展项目(2005CB623705-04)

作者(Author): 吕青,刘志义,段水亮,李尧

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