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
收藏
页码：359 / 374
页数：16
相关论文
共 82 条
[41]   Grain size effects on the corrosion behavior of Ni50.5Ti49.5 and Ni45.6Ti49.3Al5.1 films [J].
Liu, K. Ting ;
Duh, J. Gong .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2008, 618 (1-2) :45-52
[42]   Properties of friction-stir-welded 7075 T651 aluminum [J].
Mahoney, MW ;
Rhodes, CG ;
Flintoff, JG ;
Spurling, RA ;
Bingel, WH .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (07) :1955-1964
[43]   Effect of grain boundary characteristics on intergranular corrosion resistance of 6061 aluminum alloy extrusion [J].
Minoda, T ;
Yoshida, H .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2002, 33 (09) :2891-2898
[44]   Effect of nanocrystalline grain size on the electrochemical and corrosion behavior of nickel [J].
Mishra, R ;
Balasubramaniam, R .
CORROSION SCIENCE, 2004, 46 (12) :3019-3029
[45]   Friction stir welding and processing [J].
Mishra, RS ;
Ma, ZY .
MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2005, 50 (1-2) :1-78
[46]   Effect of residual stresses on hydrogen permeation in iron [J].
Mouanga, M. ;
Bercot, P. ;
Takadoum, J. .
CORROSION SCIENCE, 2010, 52 (06) :2010-2014
[47]   Comparison of susceptibility to pitting corrosion of AA2024-T4, AA7075-T651 and AA7475-T761 aluminium alloys in neutral chloride solutions using electrochemical noise analysis [J].
Na, Kyung-Hwan ;
Pyun, Su-Il .
CORROSION SCIENCE, 2008, 50 (01) :248-258
[48]   Influence Of critical surface defects and localized competition between anodic dissolution and hydrogen effects during stress corrosion cracking of a 7050 aluminium alloy [J].
Najjar, D ;
Magnin, T ;
Warner, TJ .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 238 (02) :293-302
[49]   Recent advances in friction-stir welding - Process, weldment structure and properties [J].
Nandan, R. ;
DebRoy, T. ;
Bhadeshia, H. K. D. H. .
PROGRESS IN MATERIALS SCIENCE, 2008, 53 (06) :980-1023
[50]   Enhanced corrosion resistance of Mg alloy ZK60 after processing by integrated extrusion and equal channel angular pressing [J].
Orlov, D. ;
Ralston, K. D. ;
Birbilis, N. ;
Estrin, Y. .
ACTA MATERIALIA, 2011, 59 (15) :6176-6186
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