|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Effects of Proton Irradiation on Microstructure in Additively Manufactured 316L Stainless Steel Made by Laser Powder Bed Fusion
||Miao Song, Mi Wang, Gary S Was, Xiaoyuan Lou, Raul B Rebak
|On-Site Speaker (Planned)
The nuclear industry has been exploring the use of 3D printing or additive manufacturing (AM) technology for reactor internal applications. The objective of this work is to conduct proton irradiation on stress-relieved AM 316L stainless steel (SS) to a damage level of 5 dpa at 360 șC, and compare the irradiated microstructure to post-printing hot-isostatically-pressed (HIPed) AM material, as well as conventionally forged samples. After irradiation, dislocation loops, nano-cavities and γ′ precipitates were formed. The AM materials showed the worst microstructure response compared to the HIPed and forged materials in terms of void swelling, dislocation loop structure, and radiation induced precipitates. The HIPed material showed the best irradiation resistance. These results suggest that post-printing HIPing + heat treatment can improve the microstructural response in a radiation environment.
||Planned: Supplemental Proceedings volume