On femtosecond laser shock peening of stainless steel AISI 316

27 Nov 2017  ·  Hoppius Jan S., Kukreja Lalit M., Knyazeva Marina, Pöhl Fabian, Walther Frank, Ostendorf Andreas, Gurevich Evgeny L. ·

In this paper we report on the competition in metal surface hardening between the femtosecond shock peening on the one hand, and formation of laser-induced periodic surface structures (LIPSS) and surface oxidation on the other hand. Peening of the stainless steel AISI 316 due to shock loading induced by femtosecond laser ablation was successfully demonstrated... However, for some range of processing parameters, surface erosion due to LIPSS and oxidation seem to dominate over the peening effect. Strategies to increase the peening efficiency are discussed. read more

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Applied Physics