| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Characterisation of Ion-irradiated BCC Ferritic Superalloys for High-Temperature and Nuclear Applications |
| Author(s) |
Sophia Von Tiedemann, Kan Ma, Colin Ophus, Jóhan Pauli Magnussen, Muhammad Naeem, Pedro Ferreiros, David Bowden, Alexander Knowles |
| On-Site Speaker (Planned) |
Sophia Von Tiedemann |
| Abstract Scope |
For advances in nuclear fusion and generation-IV fission power, the development of novel materials with long-term stability in microstructure and physical properties under extreme temperature and neutron fluxes is essential. Here we explore the concept of intermetallic dispersion-strengthened (IDS) BCC ferritic superalloys, where a high density of precipitate-matrix interfaces is exploited as a sink for irradiation-induced point defects.
A series of Fe-Al-X model alloys (X=Ni, V, Ti) has been developed analogous to Ni-based superalloys, where a disordered BCC A2-Fe matrix is strengthened by ordered-BCC, semi-/coherent B2/L21 nanoprecipitates. This study systematically investigates the effects of composition, precipitate size, morphology and volume fraction alongside lattice misfit on their microstructural evolution and performance following Fe+-ion irradiation at 300°C. Microstructural characterisation and nano-mechanical performance pre- and post-irradiation were performed using SEM, (S)TEM, 4D-STEM, APT, neutron diffraction and nanoindentation to gain an understanding of the underlying mechanisms in these novel materials for next-generation nuclear. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Characterization |