Influence of ultrasonic impact treatment on stress corrosion of 7075 aluminum alloy and its welded joints

被引：26
作者：
Wang, J. T. [1 ,3 ,6 ]
Chen, J. W. [1 ]
Zhang, Y. K. [2 ,3 ,7 ]
Xu, X. L. [4 ]
Wang, Z. G. [4 ]
Xie, L. [1 ]
He, M. T. [1 ]
Lu, Y. L. [1 ]
Luo, K. Y. [5 ]
Wang, M. Z. [1 ]
机构：
[1] Jiangsu Univ Technol, Sch Mat Engn, Changzhou 213001, Peoples R China
[2] Guangdong Laser Peening Technol Co Ltd, Foshan 282000, Peoples R China
[3] Guangdong Univ Technol, Sch Mech Engn, Guangzhou 510006, Peoples R China
[4] COSCO SHIPPING Shipyard Nantong Co Ltd, Nantong 226002, Peoples R China
[5] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China
[6] Jiangsu Univ Technol, Sch Mat Engn, Zhongwu Ave 1801, Changzhou 213001, Peoples R China
[7] Guangdong Univ Technol, Sch Mech Engn, West Waihuan Ave 100, Guangzhou 510006, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2023年 / 144卷
基金：
中国国家自然科学基金;
关键词：
SCC; Ultrasonic impact treatment; Residual compressive stress; Grain refinement; 7075 aluminum alloy; MECHANICAL-PROPERTIES; STAINLESS-STEEL; SURFACE NANOCRYSTALLIZATION; LOCALIZED CORROSION; FATIGUE BEHAVIOR; STRENGTH; CU; RESISTANCE; CRACKING; MICROSTRUCTURES;
D O I：
10.1016/j.engfailanal.2022.106908
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of ultrasonic impact treatment (UIT) on stress corrosion cracking (SCC) of 7075 aluminum alloy and its welded joints have been investigated. The microstructural evolution, corrosion behavior, and mechanical properties of the UITed and untreated specimens were studied. The results showed that UIT can refine the grains dramatically and induce a compressive residual stress layer with a depth of 50-75 mu m on the material surface. The corrosion resistance was also improved, exhibiting that the SCC factors I sigma, I delta, and SSI of the specimens with doubleside treatments decreased by 37 %, 68 %, and 46 %, respectively. The improved SCC resistance of 7075 aluminum alloy and its welded joints subjected to UIT was mainly attributed to the residual compressive stress and grain refinement, which not only enhanced the pitting corrosion resistance but also effectively inhibited the initiation and growth of corrosion cracking.
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页数：19
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