Effect of Corrosion Environment on Mechanical Behavior of 5083/6005A Welded Joints

被引:0
|
作者
Wu, Hailiang [1 ]
Chen, Yuqiang [1 ]
Lu, Dingding [1 ]
He, Guanqiang [2 ]
机构
[1] Hunan Univ Sci & Technol, Hunan Engn Res Ctr Forming Technol & Damage Resist, Xiangtan 411201, Peoples R China
[2] Zhuzhou CRRC Times Elect Co Ltd, Zhuzhou 412001, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
aluminum alloy welded joint; corrosive medium; stress corrosion; corrosion fatigue life; corrosion mechanism; ALUMINUM-ALLOY; ATMOSPHERIC CORROSION; RESISTANCE; MICROSTRUCTURE; MORPHOLOGY; INDUSTRIAL; CRACKING; TIME;
D O I
10.3390/met14080925
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The corrosion fatigue behavior of welded joints is a critical concern in the transportation industry, which shortens their service life. In this paper, the corrosion damage of 5083/6005A welded joints exposed to different conditions (3.5% NaCl + 0.01 mol/L NaHSO3, 3.5% NaCl, 0.6 mol/L NaHSO3, and 3.5% NaCl + 0.01 mol/L NaHSO3-75 MPa) was investigated by using tensile and fatigue tests, polarization curves, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The findings indicate that elongation and fatigue life were most adversely affected by exposure to 3.5% NaCl + 0.01 mol/L NaHSO3-75 MPa. This was followed by the exposure to 3.5% NaCl + 0.01 mol/L NaHSO3, then 3.5% NaCl, with the mildest effects observed under 0.6 mol/L NaHSO3. The corrosion mechanisms were elucidated and the corrosion model was established through the analysis of corrosion morphologies and corrosion products. The corrosion fatigue fracture model was developed by analyzing the fracture surfaces. These findings provide references for preventing the corrosion-fatigue fractures of 5083/6005A welded joints, extending their service life, and enhancing the operational safety and reliability of trains.
引用
收藏
页数:18
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