肖代红,黄伯云,陈康华

• 1:中南大学粉末冶金国家重点实验室
• 2:中南大学粉末冶金国家重点实验室
• 3:中南大学粉末冶金国家重点实验室 湖南长沙410083
• 4:郑州大学材料物理教育部重点实验室

摘要(Abstract)：

采用硬度测试、拉伸性能测试、X射线衍射、金相观察、扫描电镜与透射电镜等方法,研究了添加0.2wt%Er对Al-5.3Cu-0.8Mg-0.6Ag合金的组织与性能影响。结果表明,微量稀土Er可显著降低铸态合金的晶粒尺寸,提高铸态合金的室温与高温力学性能;然而,Er降低了挤压态合金的时效硬化与拉伸性能,这是由于Er与合金中的Al、Cu形成了Al8Cu4Er稀土化合物,减少了用于固溶时效的Cu元素,最终使强化析出相Ω相的体积分数减少。

关键词(KeyWords)： Al-Cu-Mg-Ag合金;稀土Er;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金(20070410986);; 材料物理教育部重点实验室开放基金(ZMPL07SW0002)

作者(Author): 肖代红,黄伯云,陈康华

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