| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Design of novel intermetallic reinforced nano-structured steels for nuclear |
| Author(s) |
Iris Carneiro, Luke Howard, Alexander J. Knowles |
| On-Site Speaker (Planned) |
Iris Carneiro |
| Abstract Scope |
Ferritic superalloys and high entropy alloys are novel materials being developed for Gen-IV fission to allow for higher operating temperatures and better tolerance to radiation. In this work, three Fe-Ni-Al-Cr-Ti ferritic high entropy superalloys were designed focusing on replacing nickel with lower activating elements, as Mn and V, so they would be suitable for fusion applications. The alloys were produced by arc-melting and characterized using SEM, EBSD, XRD and hardness testing.
The vanadium-containing alloy exhibited a microstructure characterized by a disordered A2 BCC matrix with B2-FeAl precipitates. While the manganese-containing alloys showed cuboidal L21 (Fe2AlTi) nano-precipitates. The increase in manganese leads to the formation of cubic-A13 (β-Mn) and χ-phase in the samples aged at 700 and 850 ◦C.
With this study, it was possible to achieve A2 - B2/L21 ferritic superalloy microstructures within a compositionally complex matrix, without the undesirable presence of Ni limiting their application toward fusion energy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Iron and Steel |