On femtosecond laser shock peening of stainless steel AISI 316
Jan S. Hoppius, Lalit M. Kukreja, Marina Knyazeva, Fabian P\"ohl,, Frank Walther, Andreas Ostendorf, Evgeny L. Gurevich
TL;DR
This study investigates femtosecond laser shock peening of stainless steel AISI 316, highlighting the competition between surface hardening, LIPSS formation, and oxidation, and discusses methods to enhance peening effectiveness.
Contribution
It demonstrates successful femtosecond laser shock peening of stainless steel and analyzes the competing effects of LIPSS and oxidation, proposing strategies to improve peening efficiency.
Findings
Successful demonstration of femtosecond laser shock peening on AISI 316
LIPSS and oxidation can dominate surface modifications under certain conditions
Strategies to increase peening efficiency are discussed
Abstract
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.
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