Effects of retrogression heating rate on microstructures and mechanical properties of aluminum alloy 7050

被引：0
|
作者：
李国锋 [1 ]
张新明 [1 ]
李鹏辉 [1 ]
游江海 [1 ]
机构：
[1] School of Materials Science and Engineering, Key Laboratory of Nonferrous Metal Material Science and Engineering of Ministry of Education, Central South University
来源：
Transactions of Nonferrous Metals Society of China | 2010年 / 20卷 / 06期
关键词：
aluminum alloy 7050; retrogression and re-aging treatment; microstructure; mechanical properties;
D O I：
暂无
中图分类号：
TG146.21 [];
学科分类号：
080502 ;
摘要：
The effects of the retrogression heating rate(340℃/min,57℃/min,4.3℃/min)on the microstructures and mechanical properties of aluminum alloy 7050 were investigated by means of hardness measurement,tensile properties testing,differential scanning calorimetry(DSC)and transmission electron microscopy(TEM).The results show that the retrogression heating rate significantly affects the microstructures and mechanical properties of the alloys treated by retrogression and re-aging(RRA)process, and it is found that the medium rate(57℃/min)leads to the highest mechanical properties.The strengthening phases in the matrix are mainly the fine dispersed η′precipitates and GP zones,and the grain boundary precipitates are coarse and discontinuous η phases.
引用
收藏
页码：935 / 941
页数：7
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