Improvements in strength and electrical conductivity in 7B04 aluminum alloy pre-stretched thick plates via low-temperature retrogression and re-ageing heat treatments

被引：3

作者：

Li, Zhihui ^{[1
]}

Xiong, Baiqing ^{[1
]}

Zhang, Yongan ^{[1
]}

Zhu, Baohong ^{[1
]}

Wang, Feng ^{[1
]}

Liu, Hongwei ^{[1
]}

机构：

[1] Gen Res Inst NonFerrous Met, State Key Lab Fabricat & Proc Nonferrous Metals, Beijing, Peoples R China

来源：

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷

关键词：

7B04 aluminum alloy; pre-stretched thick plates; retrogression and re-ageing; electrical conductivity; tensile strength;

D O I：

10.4028/www.scientific.net/MSF.561-565.139

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of RRA treatment with using low retrogression temperatures between 170 degrees C to 190 degrees C on the strength and electrical conductivity (as an indicator of corrosion resistance) of 7B04 aluminum alloy thick plates was investigated. The research results showed that the low-temperature RRA heat treatment provides a means for improving electrical conductivity of the aluminum alloy 7B04 pre-stretched thick plates without sacrificing the mechanical strength. The RRA temper with retrogression at 180 degrees C for 60 min improved electrical conductivity remarkably (reached 21.0MS/m), with only a 3% reduction in strength below T6 temper. Furthermore, TEM observations showed that the microstructure of RRA treated alloy was a very fine distribution of eta' MgZn2 precipitates in the aluminum matrix, similar to T6 condition and eta MgZn2 precipitates on grain boundaries distributed similarly to T73 temper.

引用

页码：139 / 142

页数：4

共 3 条

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