Laser Peening for Surface Enhancement of Stainless Steel

Main Article Content

Hitoshi Nakano
Ippei Kitawaki
Miho Tsuyama


Surface enhancement of stainless steel by laser peening has been studied. Especially, in this study, effects of control of plasma confinement layer on have been investigated. The plasma confinement layer for the laser peening is usually used the transparent medium to the laser wavelength, such as a glass and water. The confinement ability depends on the acoustic impedance of the medium. In this study, the acoustic impedance of the water has been controlled by dissolving sodium chloride (NaCl). Second harmonic of Nd:YAG laser having the pulse duration of 4 ns has been used for the laser peening experiments. Commercial SUS316L stainless steel has been adopted as a sample. The samples were investigated under nanosecond laser shock loading in plasma confined by aqueous sodium chloride solution. Vickers hardness test and X-ray diffraction method are used to probe work hardening and residual stress due to plastic deformation induced by laser peening. Through hardness and residual stress measurements, it is found that optimal concentration of the sodium chloride solution has been existed for the laser peening.



Download data is not yet available.

Article Details

Research Article


K. Ding and L. Ye, Laser Shock Peening. n.p.: CRC Press, 2006.

Y. Sano, N. Mukai, K. Okazaki, and M. Obata, “Residual stress improvement in metal surface by underwater laser irradiation,” Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol. 121, no. 1, pp. 432–436, Jan. 1997.

A. H. Clauer, J. H. Holbrook, and B. P. Fairand, “Effects of Laser Induced Shock Waves on Metals,” in Shock Waves and High-Strain-Rate Phenomena in Metals, M. A. Meyers and L. E. Murr, Eds. Springer US, 1981, pp. 675–702.

P. Peyre and R. Fabbro, “Laser shock processing: a review of the physics and applications,” Opt Quant Electron, vol. 27, no. 12, pp. 1213–1229.

X. Hong, S. Wang, D. Guo, H. Wu, J. Wang, Y. Dai, X. Xia, and Y. Xie, “Confining medium and absorptive overlay: Their effects on a laser-induced shock wave,” Optics and Lasers in Engineering, vol. 29, no. 6, pp. 447–455, Jun. 1998.

R. Fabbro, J. Fournier, P. Ballard, D. Devaux, and J. Virmont, “Physical study of laser‐produced plasma in confined geometry,” Journal of Applied Physics, vol. 68, no. 2, pp. 775–784, Jul. 1990.

Y. Sano, “Residual Stress Improvement by Laser Peening without Coating and Its Applications,” in The 65th Laser without protective coating,” Materials Science and Engineering: A, vol. 417, no. 1–2, pp. 334–340, Feb. 2006. Materials Processing Conference, 2005, pp. 1–6.

Y. Sano, M. Yoda, N. Mukai, M. Obata, M. Kanno, and S. Shima, “Coating and Its Applications,” Journal of the Atomic Energy Society of Japan, vol. 42, p. 567, 2000.

Y. Sano, N. Suezono, Y. Yoda, M. Mukai, and K. Ogawa, “Special Technical Publication,” Materials Science Research International, vol. 2, p. 453, 2001.

Y. Sano, M. Obata, T. Kubo, N. Mukai, M. Yoda, K. Masaki, and Y. Ochi, “Retardation of crack initiation and growth in austenitic stainless steels by laser peening without protective coating,”Materials Science and Engineering: A, vol. 417, no. 1–2, pp. 334–340, Feb. 2006.

Y. Sano, T. Corporation, and K. Akita, “Laser Peening without Coating as a Surface Enhancement Technology,” Journal of Laser Micro/ Nanoengineering, vol. 1, no. 3, pp. 161–166, 2006.

B. Pal and S. Kundu, “Anomalous Ultrasonic Attenuation in Aqueous NaCl Solutions,” Universal Journal of Chemistry, vol. 1, no. 3, pp. 69–101, 2013.

R. W. Potter and D. L. Brown, Preliminary Steam Tables for Nalco. n.p.: Solutions, 1977.

M. R. James and J. B. Cohen, The Measurement of Residual Stress by X-ray Diffraction Techniques. n.p., 1980

R. Fabbro, P. Peyre, L. Berthe, and X. Scherpereel, “Physics and applications of laser-shock processing,” Journal of Laser Applications, vol. 10, no. 6, pp. 265–279, Dec. 1998.