| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
An Irradiation Microstructure Challenge Problem for Accelerated Irradiation Effects Qualification |
| Author(s) |
Stephen Taller, Wei-Ying Chen, Timothy Lach, Andrea Jokisaari |
| On-Site Speaker (Planned) |
Stephen Taller |
| Abstract Scope |
Irradiation-induced degradation must be assessed for new materials and new manufacturing methods intended for advanced reactors. This study compared ion irradiations of laser powder bed fusion (LPBF) produced 316L and 316H conducted with 4 MeV and 9 MeV nickel ions with the same materials irradiated in the High Flux Isotope Reactor (HFIR) at target temperatures of 300°C and 600°C to 2 and 10 dpa. From ion irradiation, dislocation cell microstructures from LPBF disappeared by 2 dpa and a void superstructure developed by 5 dpa. Similar dislocation cell structure evolution and initial stages of void structure were observed from HFIR irradiation. An overview of modeling work to bridge different radiation temperatures and damage rates is discussed with the goal to demonstrate a science-driven accelerated qualification strategy using AM 316 SS that combines neutron irradiations, ion irradiations, and physics-based modeling to allow for a risk-informed decision. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Additive Manufacturing, Nuclear Materials |