About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Designing High-Entropy and Compositionally Complex Alloys from (Al-Mn)-(Co-Fe-Ni) Pseudo-Binary Systems to Stabilize the Tau Phase in Al-Mn-Based Ferromagnetic Alloys |
| Author(s) |
Sacha PLAGNOL--CHAUZU, Laurent Peltier, Fodil Meraghni, Stéphane Delalande, Frédéric Mazaleyrat |
| On-Site Speaker (Planned) |
Sacha PLAGNOL--CHAUZU |
| Abstract Scope |
This study examines alloys in the (Al46Mn54)x(CoFeNi)100-x pseudo-binary system.
The objective is to gain a deeper understanding of the thermodynamic limits of the ferromagnetic Al-Mn τ phase within the context of High-Entropy Alloys (HEAs) and Compositionally Complex Alloys (CCAs).
Although this phase shows promise as a rare-earth-free permanent magnet, its instability prevents its industrialization. The present work investigates nine distinct compositions, combining Al46-Mn54 with CoFeNi in varying proportions.
The alloys have been produced using a cold-crucible and studied in as-cast condition.
Characterization methods included X-ray diffraction and magnetic property measurements. The experimental findings highlight an interplay between composition, phase stability, and magnetic response.
The study concludes that a more robust, thermodynamically informed approach is required to explore the compositions of HEAs based on metastable phases. Furthermore, the magnetic properties evolve with composition in a way not reflected in the XRD patterns, indicating that it arises not only from crystal structure. |
| Proceedings Inclusion? |
Undecided |