| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Stability of VN, TaN, and TaC MX-type Precipitates in Neutron Irradiated Model Ferritic Alloys |
| Author(s) |
Emily Proehl, Weicheng Zhong, Ying Yang, Lizhen Tan, Steven Zinkle |
| On-Site Speaker (Planned) |
Emily Proehl |
| Abstract Scope |
Ferritic martensitic (FM) steels are leading candidates for advanced fission and fusion reactor structural materials, such as the fusion blanket and first wall. The introduction of alloying elements that encourage nanoscale MX (M=V, Ta X=C, N) precipitation in the FM steel matrix has yielded dramatic increases in creep resistance in previous FM steel grades due to their propensity to nucleate both in the matrix and on grain boundaries, along with the superior MX thermal stability compared to other precipitates in FM steel, like M23C6 carbides. In this work, three model ferritic alloys containing VN, TaN, and TaC MX-type precipitates, respectively, were irradiated to 7.4 dpa at 490°C in the High Flux Isotope Reactor. The relative stability of each MX-type precipitate was investigated after neutron irradiation using transmission electron microscopy. The impact of these observations on the design of next generation FM steels for nuclear applications will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, Characterization |