| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Investigating Radiation Effects on Anisotropic Properties of WAAM-Fabricated Grade 91 Steel for Nuclear Applications |
| Author(s) |
T.M. Kelsy Green, Caleb P. Massey, Niyanth Sridharan, Kevin G. Field |
| On-Site Speaker (Planned) |
T.M. Kelsy Green |
| Abstract Scope |
Though additive manufacturing (AM) of metallic alloys is a key research area for in-core nuclear energy applications, the radiation effects of AM materials, especially regarding AM-induced anisotropy, are not well understood. To investigate, Grade 91 steel, a candidate for Generation IV reactors, was produced using wire arc AM (WAAM). Tensile samples from directions parallel and perpendicular to the build direction were neutron irradiated to 0.75 and 2.1 dpa at ~300°C. Samples were either in the as-printed or heat-treated conditions before irradiation. Pre-irradiation tests showed significant effects of build direction on strain hardening and elongation after necking, which persisted post-irradiation. The initially stronger as-printed specimens showed greater irradiation hardening as compared to the heat-treated specimens. Possible mechanisms for this surprising result will be discussed. This study highlights the impact of processing on AM metals' irradiation responses and is the first to present data on neutron irradiated F/M steels fabricated with WAAM. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Nuclear Materials |