About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
N-7: Effect of Ultrasonic Impact Peening on Austenitic Stainless Steel Welds for Nuclear Canister Applications |
Author(s) |
Merbin John, Alessandro M Ralls, Manoranjan Misra, Pradeep Menezes |
On-Site Speaker (Planned) |
Alessandro M Ralls |
Abstract Scope |
Austenitic stainless steel (ASS) based structural components are ideal for storing spent nuclear fuels in dry storage canisters. However, inferior weld properties cause premature failure which is a potential safety concern. This study investigates the effect of ultrasonic impact peening (UIP) on gas tungsten arc welded (GTAW) ASS for nuclear canister applications. More specifically, UIP is carried out on the as-weld SS304 for 1.5 mins and 3.5 mins impact time and its effect on mechanical properties and microstructural features was studied. UIP induced a maximum residual compressive stress (RCS) of -458 MPa and 584 MPa on the top surface of the weld for 1.5 and 3.5 mins, respectively. Electron back scattered diffraction (EBSD) studies showed superior grain refinement in the fusion zone. UIP also enhanced microhardness in the fusion zone. Electrochemical corrosion studies showed excellent corrosion resistance of UIP’ed weld compared to as-weld. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Characterization, Iron and Steel |