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This is a Observational study (also classified as: In Vitro Study).

Effect of Laser Shock Peening on the Fatigue Performance of Q355D Steel Butt-Welded Joints

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Laser shock peening significantly enhances fatigue resistance of welded joints, improving overall performance.
Fatigue life extended by 113–165% in high-stress regions, demonstrating LSP's effectiveness.
Microhardness increases and residual compressive stress suppresses tensile stress concentration after LSP treatment.
Fractographic analysis shows reduced microcrack density and fatigue striation spacing due to microstructural refinement.

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Laser shock peening enhances fatigue resistance of Q355D steel butt-welded joints, indicating its potential in structural applications.

You et al. (2025) studied this question.

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