Enhanced fatigue strength of 2A02 aluminum alloy via micro laser shock peening

被引：3
|
作者：
Tian, Zeng [1 ,2 ]
Luo, Sihai [1 ]
Zhou, Liucheng [1 ]
ZhangLiang, Shuyi [2 ]
Dang, Xiaofeng [1 ]
He, Weifeng [1 ,3 ]
机构：
[1] Air Force Engn Univ, Natl Key Lab Aerosp Power Syst & Plasma Technol, Xian 710038, Peoples R China
[2] Xian Tyrida Opt Elect Technol Co Ltd, Xian 710077, Peoples R China
[3] Xi An Jiao Tong Univ, Natl Key Lab Aerosp Power Syst & Plasma Technol, Xian 710049, Shaanxi, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2023年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Micro laser shock peening; Fatigue strength; Work hardening; Surface microstructure; AL-ALLOY; MICROSTRUCTURE; DEFORMATION; BEHAVIOR; RESISTANCE; FAILURE; GROWTH;
D O I：
10.1016/j.optlastec.2023.109675
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The effects of micro laser shock peening (micro-LSP) on microstructure, microhardness, surface topography, and fatigue strength of 2A02 aluminum alloy are studied in the present work. The results show that micro-LSP can significantly improve fatigue strength regardless of a high surface roughness introduced by micro-LSP treatment. The fatigue strength enhancement is mainly attributed to the combined contribution of high-density dislocations in the slightly remelted surface layer, transition of precipitate, work hardening layer, and grain refinement induced by micro-LSP treatment. This study demonstrates the potential application of micro-LSP in the improvement of the service life extension of aircraft structural parts.
引用
收藏
页数：8
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