Some effects of alloy composition on stress corrosion cracking in Al-Zn-Mg-Cu alloys

被引：145
作者：
Knight, S. P. [1 ]
Pohl, K. [1 ]
Holroyd, N. J. H.
Birbilis, N. [1 ]
Rometsch, P. A. [1 ]
Muddle, B. C. [1 ]
Goswami, R. [2 ]
Lynch, S. P. [1 ,3 ]
机构：
[1] Monash Univ, Dept Mat Engn, Clayton, Vic 3168, Australia
[2] Naval Res Lab, Washington, DC USA
[3] Def Sci & Technol Org, Melbourne, Vic, Australia
来源：
CORROSION SCIENCE | 2015年 / 98卷
关键词：
Aluminium; Alloy; SEM; XPS; Stress corrosion; RAY PHOTOELECTRON-SPECTROSCOPY; ALUMINUM-ALLOYS; HEAT-TREATMENT; WATER-ADSORPTION; OXIDE-FILMS; BEHAVIOR; XPS; MICROSTRUCTURES; EVOLUTION; SURFACE;
D O I：
10.1016/j.corsci.2015.05.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Stress corrosion cracking (SCC) of two lower-copper Al-Zn-Mg-Cu alloys, AA7079 and AA7022 (0.6-0.9 wt%Cu), and a higher-copper AA7075 (1.5 wt%Cu) alloy are reported. In aqueous chloride, copper content of grain boundary precipitates is believed to be controlling, whereas in moist air it appears that the hydrogen diffusivity could be evident from the rate of crack growth between crack arrest markings. In moist air, the rate of hydrogen entry may control crack growth rates. X-ray photoelectron spectroscopy showed that the oxide formed in ambient conditions (e.g. similar to 50% RH) was more hydrated on the AA7075-T651 than AA7079-T651. (C) 2015 Elsevier Ltd. All rights reserved.
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收藏
页码：50 / 62
页数：13
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