Corrosion resistance of a two-stage stress-aged Al-Cu-Mg alloy: Effects of stress-aging temperature

被引：42
|
作者：
Lin, Y. C. [1 ,2 ,3 ]
Liu, Guan [1 ,3 ]
Chen, Ming-Song [1 ,2 ]
Huang, Yuan-Chun [1 ,2 ,3 ]
Chen, Zhi-Guo [4 ]
Ma, Xiang [5 ]
Jiang, Yu-Qiang [1 ,3 ]
Li, Jia [1 ,3 ]
机构：
[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China
[2] Cent S Univ, Light Alloy Res Inst, Changsha 410083, Peoples R China
[3] State Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China
[4] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[5] SINTEF Mat & Chem, Oslo, Norway
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 657卷
关键词：
Alloy; Precipitation; Corrosion test; Electron microscopy; Polarization; TENSILE DEFORMATION BEHAVIORS; ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; PITTING CORROSION; CONSTITUTIVE MODEL; MICROSTRUCTURE; PRECIPITATION; 2024-T3; PROTECTION;
D O I：
10.1016/j.jallcom.2015.10.114
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Two-stage stress-aging experiments of an Al-Cu-Mg alloy were performed. The effects of stress-aging temperature on corrosion resistance of the two-stage stress-aged Al-Cu-Mg alloy are discussed. It is found that the stress-aging temperature significantly affects corrosion resistance, which is ascribed to the evolution of aging precipitates. The aging precipitates uniformly nucleate in the first stage of two-stage stress-aging. Increasing stress-aging temperature can enhance the uniform distribution of precipitates, but precipitates easily become coarse in the second stage of two-stage stress-aging. The coarsen precipitates enlarge the potential difference between aging precipitate and aluminum matrix, and decrease the corrosion resistance. So, the corrosion resistance of the stress-aged alloy decreases with the increase of the second stage stress-aging temperature. Furthermore, the optimized stress-aging temperature is about 433 K within the tested conditions. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：855 / 865
页数：11
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