| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Evolution of Heterogeneous 316L Stainless Steel Microstructures Under Neutron Irradiation |
| Author(s) |
Geeta Kumari, Tim Lach, Stephen Taller, Caleb Massey |
| On-Site Speaker (Planned) |
Geeta Kumari |
| Abstract Scope |
Additive Manufacturing (AM) has greatly improved the ability to efficiently manufacture complex parts for a wide range of applications including extreme environments. However, AM methods like laser powder bed fusion (LPBF) commonly result in significant variations in the as-printed microstructure and localized chemical composition throughout printed parts. This work aimed to study the evolution of chemical heterogeneity in LPBF 316LSS under neutron irradiation and its correlation with the property changes. Two different LPBF 316LSS samples, previously irradiated at ORNL’s High Flux Isotope Reactor to estimated doses of 0.2 and 2 dpa at a target irradiation temperature of 300℃, were analyzed. After etching to reveal the weld pool microstructure, we examined the chemical segregation and phases with targeted electron microscopy (SEM, TEM) and nanoindentation tests within the grains and at interfaces. The observed changes were compared and rationalized with previously studied unirradiated samples, providing insights into the material's behavior under irradiation. |
| Proceedings Inclusion? |
Planned: |