| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
Microstructural Investigation of Grade 92 Steel After Fast Neutron Irradiation to 16 - 87 dpa at 380 – 530°C |
| Author(s) |
Emily Proehl, Weicheng Zhong, Steven Zinkle, Stephen Taller |
| On-Site Speaker (Planned) |
Emily Proehl |
| Abstract Scope |
Grade 92 (G92) steel is a third-generation ferritic martensitic (FM) steel with superior high temperature creep resistance compared to previous FM steel generations and is a leading candidate as a nuclear reactor structural material. However, limited data exists on the microstructural response of G92 steel at high doses from neutron irradiation. In this work, G92 steel was irradiated in the BOR-60 fast reactor to 16 – 87 dpa at 380 – 530°C, representing a comprehensive microstructural investigation of reactor-irradiated G92 steel at conditions relevant for Gen IV reactors. The microstructure of the irradiated G92 steel was analyzed using transmission electron microscopy to evaluate precipitate evolution, cluster formation, chemical segregation, cavity swelling, and dislocation behavior. Instability of M23C6 carbides, precipitation of new phases, and temperature-dependent cavity swelling were observed, all of which have implications on mechanical properties and design specifications for deployment of G92 steel in a nuclear reactor. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Iron and Steel |