About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
A Novel Soft-magnetic Single-phase B2-ordered Multi-principal Element Alloy |
Author(s) |
Youxiong Ye, Scott Lish, Liubin Xu, Markus Wittmann, Haixuan Xu, Ian Baker |
On-Site Speaker (Planned) |
Youxiong Ye |
Abstract Scope |
This presentation will discuss the microstructure, and magnetic and mechanical properties of a novel soft-magnetic single-phase B2-structured Fe30Co40Mn15Al15 multi-principal element alloy (MPEA). The MPEA has a high saturation magnetization of ~156 Am2/kg, a low coercivity of ~207 A/m, and a high Curie temperature of ~1137 K, which are superior to those previously reported for soft magnetic MPEAs. The alloy exhibited high thermal stability in terms of microstructure, mechanical and magnetic behavior upon long time annealing at 873 K. The sublattice site occupancy of the constituent elements was determined using the TEM-based technique ALCHEMI, and it was found that the Al tended to reside on one site, whereas the other elements partitioned between the two sites of the AB-type B2 structure. Density functional theory calculations revealed that Co, Fe, and Mn showed ferromagnetic behavior, while Al exhibited non-ferromagnetism. The excellent soft magnetic properties were retained at up to 973 K. |