Corrosion behaviour and mechanism of new aerospace Al-Zn-Mg alloy friction stir welded joints and the effects of secondary Al3ScxZr1-x nanoparticles

被引：75

作者：

Deng, Ying ^{[1
,2
,3
]}

Ye, Rui ^{[2
]}

Xu, Guofu ^{[2
,3
]}

Yang, Jidong ^{[2
]}

Pan, Qinglin ^{[2
]}

Peng, Bing ^{[1
]}

Cao, Xiaowu ^{[2
]}

Duan, Yulu ^{[2
]}

Wang, Yingjun ^{[4
]}

Lu, Liying ^{[4
]}

Yin, Zhimin ^{[2
]}

机构：

[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[3] Cent S Univ, State Key Lab Power Met, Changsha 410083, Hunan, Peoples R China

[4] Northeast Light Alloy Co Ltd, Harbin 150060, Heilongjiang, Peoples R China

来源：

CORROSION SCIENCE | 2015年 / 90卷

基金：

中国博士后科学基金;

关键词：

Aluminium; SEM; TEM; Stress corrosion; Welding; ZR MICROALLOYING ADDITIONS; ALUMINUM-ALLOY; GRAIN-SIZE; RESIDUAL-STRESSES; PITTING CORROSION; CRACKING SUSCEPTIBILITY; LOCALIZED CORROSION; DEGREES-C; MICROSTRUCTURE; RESISTANCE;

D O I：

10.1016/j.corsci.2014.10.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion behaviour, residual stress, intermetallics and microstructure of friction stir welded aerospace Al-Zn-Mg and Al-Zn-Mg-0.10Sc-0.10Zr (wt.%) alloys were investigated comparatively and in detail. The thermo-mechanically affected zones adjacent to weld nugget are most susceptible to corrosion in two weld joints. In addition to the enrichment of coarse Si and Fe intermetallics, wide precipitate free zones (in Al-Zn-Mg weld joint) and high tensile residual stress are the key factors. Secondary Al3ScxZr1-x nanoparticles can effectively improve stress corrosion cracking resistance and decrease exfoliation corrosion rates of Al-Zn-Mg weld joints by restraining the formation of precipitate free zones and refining grains. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：359 / 374

页数：16

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