Insight into the tribocorrosion of AA7050 friction stir welding joint

被引：1
|
作者：
Wang, Yan-Fei [1 ]
Lu, Hongjian [1 ]
Wang, Huan [1 ]
Xu, Weifeng [1 ]
Wang, Xian-Zong [2 ]
机构：
[1] Northwestern Polytech Univ, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Ctr Adv Lubricat & Seal Mat, Xian 710072, Shaanxi, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 238卷
基金：
中国国家自然科学基金;
关键词：
Tribocorrosion; Friction stir welding; Aluminium alloy; IMPs; Galvanic corrosion; INTERMETALLIC PHASES; CORROSION PROPERTIES; ALUMINUM-ALLOYS; MICROSTRUCTURE; BEHAVIOR; NACL;
D O I：
10.1016/j.corsci.2024.112345
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Friction stir welding (FSW) induces significant microstructural modifications in AA7050, involving the dynamic recrystallization in the weld nugget zone (WNZ) and coarsening of intermetallic particles (IMPs) in the heataffected zone (HAZ). Accounting for the enhanced Volta potential and nano-hardness, the coarse IMPs in HAZ contribute to anodic attack and initiation of wear cracks, thereby facilitating tribocorrosion damage. The multiple galvanic corrosion represented by nano-precipitate MgZn2 vs. Al-matrix, coupled with the absence of the ball-bearing effect originated from IMPs, contribute to the inferior tribocorrosion performance of WNZ. This research offers valuable references into the tribocorrosion mechanism of FSW aluminium alloy joints.
引用
收藏
页数：20
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