Effect of Yb addition on precipitation and microstructure of Al-Cu-Mg-Ag alloys

被引：0

作者：

肖代红 ^{[1
]}

黄伯云 ^{[2
]}

机构：

[1] State Key Laboratory of Powder Metallurgy,Central South University

[2] Laboratory of Material Physics, Zhengzh ou University

来源：

Transactions of Nonferrous Metals Society of China | 2007年 / 06期

关键词：

aluminum alloy; Yb addition; precipitation; microstructure; mechanical properties;

D O I：

暂无

中图分类号：

F426 [工业部门经济];

学科分类号：

0202 ; 020205 ;

摘要：

Al-Cu-Mg-Ag alloys with different Yb contents were prepared by ingot metallurgy and thermomechanical treatment. The effect of Yb addition on the precipitation and microstructure of the alloys was investigated using mechanical properties testing, optical microscopy, differential scanning calorimetry(DSC), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that adding 0.10%-0.35% Yb accelerates the aging hardening process, increases the maximum hardness and the tensile strength of the extruded alloys from room temperature to 300 ℃. Trace Yb element addition refines the grains of the casting alloys from 85 μm to 30 μm, decreases the precipitation temperature of Ω phase. Moreover, the addition of Yb into Al-Cu-Mg-Ag alloy decreases the precipitates size, and improves the density and the thermal stability of Ω phase between 200 ℃ and 300 ℃ .

引用

页码：1181 / 1185

页数：5

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