| Abstract Scope |
Next-generation nuclear systems operate under extreme conditions, including high temperatures, corrosive environments, and intense neutron irradiation, requiring advanced materials and manufacturing methods. Laser Powder Bed Fusion (LPBF) is particularly relevant for Gen IV reactors, as it enables complex geometries that improve functional integration and thermofluidic performance. Its rapid solidification produces refined microstructures, enhancing mechanical strength, creep resistance, and irradiation tolerance. Fewer welds also improve structural reliability and reduce development time.
This research investigates the feasibility of producing 316L stainless steel structural components via LPBF. Lead corrosion tests were conducted on samples with different surface treatments, including as-built, shot-peened, machined, electro-polished, and vibro-finished conditions. Optical and SEM analyses were used to evaluate surface degradation, while automated dissolution measurements quantified corrosion depth. Surface roughness and residual stress were correlated with dissolution behavior to better understand corrosion mechanisms. These results support the advancement of manufacturing strategies for Lead-cooled Fast Reactors (LFRs). |