Soft Magnetic High Entropy FeCoNiCuMn Alloy with Excellent Ductility and High Electrical Resistance

• Published in: Metals and materials international Vol. 28; no. 2; pp. 556 - 564
• Main Authors: Harivandi, Mahdi, Malekan, Mehdi, Seyyed Ebrahimi, S. A.
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01-02-2022; Springer Nature B.V; 대한금속·재료학회
• Subjects: Annealing; Argon; Casting alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coercivity; Ductility; Electric arc melting; Engineering Thermodynamics; Heat and Mass Transfer; High entropy alloys; Machines; Magnetic Materials; Magnetic properties; Magnetic saturation; Magnetism; Manufacturing; Materials Science; Mechanical properties; Metallic Materials; Microstructural analysis; Microstructure; Processes; Remanence; Solid Mechanics; Solid solutions; 재료공학; High entropy alloys; Mechanical properties; Electrical resistance; Annealing; Magnetic properties
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-021-01111-6

The equiatomic FeCoNiCuMn high entropy alloy (HEA) was prepared by vacuum arc-melting under argon atmosphere, and the as-cast alloy was subsequently annealed at 850 °C and 1000 °C for 2 and 12 h. The annealing effects on the microstructure, magnetic, electrical, and mechanical properties were investigated. Based on the microstructural analysis, three major phases were found in different conditions; (Fe, Co)-rich phase, Cu-rich phase, and homogenized solid solution phase. This HEA showed excellent soft magnetic properties (proper saturation magnetization (40 emu/g), low coercivity (7 Oe) and low magnetic remanence ratio (0.03)) and high electrical resistivity (287 µΩ.cm) with proper strength and good ductility (41%). All these properties together make FeCoNiCuMn HEA better than that of the most reported soft magnet HEAs, and it can be used as a soft magnetic material in the future.
Graphic Abstract