Study on microstructure, mechanical properties and corrosion behavior of spray formed 7075 alloy

被引：0
作者：
机构：
[1] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang
来源：
Qu, Ying-dong (quyingdong@163.com) | 2015年 / Elsevier Ltd卷 / 04期
关键词：
7075; Alloy; Corrosion; Microstructure; Retrogression and re-aging; Spray forming;
D O I：
10.1016/j.mtcomm.2015.06.003
中图分类号：
学科分类号：
摘要：
Microstructure and properties of the spray formed 7075 alloy with various heat treatments were studied by using tensile tester, transmission electron microscope and scanning electron microscope. The results show that the tiny precipitates distributed homogeneously in matrix can increase the ultimate tensile strength (UTS). The disconnected precipitates at grain boundary and wide precipitate free zones can improve the corrosion resistance of the alloy. Both strength and corrosion resistance of the alloy can be improved by retrogression and re-aging (RRA) processes. Especially, the U-RRA-H process can increase the UTS up to 791. MPa, which is higher than that after T6, T73 and conventional RRA treatments. © 2015.
引用
收藏
页码：109 / 115
页数：6
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