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

页数：8

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