Effect of Laser Shock Peening on Surface Integrity of GH3039 Superalloys

Wen, 周文 Zhou; Maozhong, 葛茂忠 Ge; Taiming, 王太明 Wang; Jianyun, 项建云 Xiang

doi:10.3788/lop202158.0314001

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Microstructure and Residual Stress1

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2024

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“…The transformation of the residual stress can be attributed to the higher laser shock wave pressure produced by higher laser power density and more impact times. The studies in references also proved that the residual stress increased with increasing of laser power density and impact times [42][43][44].…”

Section: Microstructure and Residual Stressmentioning

confidence: 99%

Laser shock peening Fe-based coatings for enhancing wear and corrosion resistance

Yang

Zhou

Chen

et al. 2021

Materials Science and Technology

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Laser Shock Peening (LSP) was introduced to reduce the residual stress and improve the wear and corrosion resistance of Fe-based 43X coating on worn U71Mn steel by laser cladding technology. The tensile stress decreased with increasing of laser power density and impact times, finally, transferred to compressive stress. The microstructure of the coatings was refined due to LSP treatment. The refined microstructure and existence of retained Austenite phase resulted in significant improvement in microhardness and anti-wear performances. The coatings after LSP process presented better corrosion resistance. However, impact three times with a higher power density has negative effect on improving the corrosion resistance.

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Section: Microstructure and Residual Stressmentioning

confidence: 99%