About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Developments in Advanced Nuclear Structural Materials
|
| Presentation Title |
Investigation of the Microstructure Evolution of FeCrNiMnAl FCC High Entropy Alloy Under Ion Irradiation |
| Author(s) |
Louis Jean, Cristelle Pareige, Bertrand Radiguet, Cornelia Kaden |
| On-Site Speaker (Planned) |
Louis Jean |
| Abstract Scope |
The INNUMAT European project aims to develop innovative structural materials for new nuclear reactors (Gen IV and fission DEMO). High Entropy Alloys (HEA) are promising due to their superior irradiation resistance, likely resulting from sluggish diffusion and the high entropy effect, making them better candidates than conventional austenitic stainless steels.
This work investigates the microstructural evolution of an FCC Fe33.5Cr11Ni43.5Mn6Al6 HEA under 5 MeV Fe2+ ion irradiation. The irradiations were carried out at 300°C at three doses (1, 3, 10 dpa). The microstructural characterization was performed using Atom Probe Tomography (APT). The results revealed the development of a 3D interconnected structure between a Cr/Fe rich region and an ordered region of Ni3Al type. APT analyses also revealed the presence of Si and P enriched clusters together with segregated dislocation loops. A quantitative description of this complex microstructure will be presented. The effect of irradiation dose will be shown and discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Characterization |