Influence of high-temperature pre-precipitation on local corrosion behaviors and ageing harden of 7055 aluminum alloy

被引：0
|
作者：
Huang Lanping [1 ]
Chen Kanghua [1 ]
Li Song [1 ]
Song Min [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷 / 09期
关键词：
7055 aluminum alloy; high-temperature pre-precipitation; exfoliation corrosion; intergranular corrosion; stress corrosion cracking;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of high-temperature pre-precipitation on stress corrosion cracking, intergranular corrosion, exfoliation corrosion behaviors and age hardening of 7055 Al-Zn-Mg-Cu aluminum alloy has been investigated in this paper. The transmission electron microscopy have shown that the high-temperature pre-precipitation could enhance the discontinuity of grain boundary precipitates and make Cu content of grain-boundary precipitates reach to 60.18at%. The stress corrosion cracking resistance of 7055 alloys could be improved with non-deteriorated strength and plasticity via the high-temperature pre-precipitation. After pre-precipitating stress intensity factor K-ISCC of 7055 alloy raised from 7.4 MPa.m(1/2) to 9.8 MPa.m(1/2). 7055 aluminum alloy with high-temperature pre-precipitation has good intergranular corrosion and exfoliation corrosion resistance property.
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页码：1628 / 1633
页数：6
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