Laser peening without coating (LPwC) has been applied to water-immersed materials using a water-penetrable light of a Q-switched and frequency-doubled Nd:YAG laser. Compressive residual stress of several hundred MPa was introduced at the surface of the materials. High-cycle fatigue (HCF) properties were evaluated through rotating-bending or push-pull type testing for an austenitic stainless steel (SUS316L), a titanium alloy (Ti-6Al-4V) and a cast aluminum alloy (AC4CH). LPwC prolonged the fatigue lives significantly, in spite of the increase in surface roughness ascribed to the ablative interaction of laser pulses with the materials.
- Pressure Vessels and Piping Division
Enhancement of Surface Properties by Laser Peening Without Coating
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Sano, Y, Altenberger, I, Scholtes, B, Masaki, K, Ochi, Y, & Akita, K. "Enhancement of Surface Properties by Laser Peening Without Coating." Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. Volume 7: Operations, Applications, and Components. Vancouver, BC, Canada. July 23–27, 2006. pp. 179-184. ASME. https://doi.org/10.1115/PVP2006-ICPVT-11-93303
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