Investigation on the effect of low pulsed laser shock peening on corrosion behavior of 316 L stainless steel

• Published in: Materials today : proceedings 2023-04
• Main Authors: Abeens, M., Premnath, M., Kavin Robert, M., Sriraman, Anantharaman, Renjith kumar, R., Muruganandhan, R.
• Format: Article
• Language: English
• Subjects: 316 L; Corrosion; LSP; SEM
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2023.04.155

A 316L alloy finds its application in diverse industries most profoundly used for marine application. Effect of corrosion becomes an inevitable negative attribute in the marine industry, particularly, the development of oxide layer formation restricted by the NaCl which creates a broken surface, developing into an inevitable failure of the surface and thereby the machinery. This study aims to develop a processing technique, namely the low pulse energy, laser shock peening process to slow down and inhibit the growth of the oxide layer. 316L alloys are primarily subjected to a low pulse laser shock peening process which is then treated in 3.5% of NaCl solution to analyze the corrosion behavior. The treated and untreated samples are subjected to various characterization techniques such as SEM to identify microstructural variation, XRD to evaluate the compressive residual stress induced, potentiostat galvanic device to understand the corrosion resistance of treated 316L. Promising results were observed through the polarization curve, wherein no 40% lower corrosion rate was obtained for the low pulse energy LSP of 400 mJ.