Microstructure and mechanical properties of Al-Cu-Mg-Ag alloyed with Ce

被引：4
|
作者：
李云涛
刘志义
周杰
夏卿坤
机构：
[1] Changsha 410083
[2] China
[3] School of Materials Science and Engineering Central South University
来源：
Transactions of Nonferrous Metals Society of China | 2007年 / S1期
关键词：
aluminum alloy; aging behavior; microstructure; Ce addition; precipitating kinetics;
D O I：
暂无
中图分类号：
TG146.21 [];
学科分类号：
080502 ;
摘要：
The aged characteristics and microstructure of two Al-Cu-Mg-Ag alloys with and without Ce addition are investigated by TEM and mechanical properties test. The results show that trace Ce addition inhibits precipitating process and delays peak aging time. 0.25% Ce additions decrease both tensile strength and ductility. TEM observation shows that the morphology of Ω precipitate can be modified by the small addition of Ce. The trace Ce affects the microstructure by reducing the volume fraction of Ω precipitate. It can be concluded that the intensive interaction between Ce and Cu decreases the Cu atom concentration in alloy matrix and reduces the precipitated kinetics for Ωphase.
引用
收藏
页码：266 / 270
页数：5
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