On femtosecond laser shock peening of stainless steel AISI 316

摘要

In this paper we report on the competition in metal surface hardening betweenthe femtosecond shock peening on the one hand, and formation of laser-inducedperiodic surface structures (LIPSS) and surface oxidation on the other hand.Peening of the stainless steel AISI 316 due to shock loading induced byfemtosecond laser ablation was successfully demonstrated. However, for somerange of processing parameters, surface erosion due to LIPSS and oxidation seemto dominate over the peening effect. Strategies to increase the peeningefficiency are discussed.