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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advances in Surface Engineering IV
Presentation Title Understanding the Mechanism of Laser Shock Peened Austenitic Stainless Steel Welds
Author(s) Merbin John, Alessandro Ralls, Manoranjan Misra, Pradeep L. Menezes
On-Site Speaker (Planned) Merbin John
Abstract Scope In the present study, laser shock peening (LSP) was conducted on welded austenitic stainless steel (ASS) widely used in dry storage canisters (DSC’s) for spent nuclear fuel storage applications. The weld is prepared using the gas tungsten arc welding (GTAW) technique. LSP experiments were performed using two different laser intensity and overlap ratios. The introduction of LSP changed residual tensile stress (RTS) to residual compressive stress (CRS) in the weld and heat-affected zone (HAZ). The maximum magnitude of RCS is induced at a depth of 75-100 Ám from the surface of weld plates. The maximum value of induced RCS is 80%-90% of the base material’s yield strength. In addition, significant grain refinement is observed in the weld and HAZ, which improves the surface integrity and prevents the failures of the components. The mechanisms for enhanced mechanical properties of welded components will be demonstrated.
Proceedings Inclusion? Planned:
Keywords Joining, Mechanical Properties, Other

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