激光强化诱导的深剖面压缩残余应力对 7075 铝合金疲劳强度的影响分析

Q3 Physics and Astronomy

Results in Optics Pub Date : 2024-03-17 DOI:10.1016/j.rio.2024.100658

Takeshi Watari , Yuta Kine , Masahiko Mitsubayashi , Yuki Kabeya , Takashi Kurita , Ryo Yoshimura , Katsuya Hirano , Toshiyuki Kawashima

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引用次数: 0

摘要

研究了激光强化引起的压缩残余应力对提高 A7075 试样疲劳强度的影响。采用顺序抛光法对未处理、喷丸强化和激光强化的试样进行了旋转弯曲疲劳试验和残余应力分布测量。结果表明，激光强化可提供更深的压应力和更深的断裂源，从而获得更高的疲劳强度。此外，控制激光参数可将压应力层的深度延长约 5 毫米，这表明激光强化可用于较厚的材料，以提高疲劳强度。

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Analysis of the effect of deep-profile compressive residual stress induced by laser peening on fatigue strength of 7075 aluminum alloy

The effect of laser peening-induced compressive residual stress on the fatigue strength improvement of A7075 specimens was investigated. Rotary bending fatigue tests and residual stress distribution measurements using the sequential polishing method were conducted on untreated, shot-peened, and laser-peened specimens. The results revealed that laser peening provides a deeper compressive stress and a deeper fracture origin, resulting in higher fatigue strength. Furthermore, controlling the laser parameters could extend the depth of the compressive stress layer by approximately 5 mm, indicating the possibility of applying laser peening to thicker materials to improve the fatigue strength.

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来源期刊

Results in Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

2.50

自引率

0.00%

发文量

115

审稿时长

71 days