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

页码：855 / 865

页数：11

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