| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
J-108: Mechanical Strengthening of a Soft-magnetic High-entropy Alloy via Widmanstätten Microstructure |
| Author(s) |
Liuliu Han |
| On-Site Speaker (Planned) |
Liuliu Han |
| Abstract Scope |
For soft magnetic materials exposed to harsh environments, they need multi-dimensional property requirements, for instance, high strength and good ductlity to withstand mechanical loading conditions. Conventional magnets usually hard to access other corners of the property landscape in the same material. We recently proposed a generic solution to the alloy systems that are thermodynamically unfavourable for triggering coherent nanoprecipitates. We realized this by introducing incoherent Widmanstätten patterned precipitates into the ferromagnetic matrix of a non-equiatomic FeCoNiTa high-entropy alloy. Although micro-sized precipitates have been thought to be detrimental to soft magnetic properties due to the pinning effect on magnetic domain walls, such an effect is counteracted by reducing grain boundary pinning in our strategy. Further, at elevated temperatures, the high thermal stability of the Widmanstätten microstructure contributes to the better magnetic properties of the precipitate-containing alloy compared to that of the precipitate-free counterpart. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Magnetic Materials, High-Entropy Alloys, Characterization |