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Soft Magnetic High Entropy FeCoNiCuMn Alloy with Excellent Ductility and High Electrical Resistance
Mahdi Harivandi,Mehdi Malekan,S. A. Seyyed Ebrahimi 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.2
The equiatomic FeCoNiCuMn high entropy alloy (HEA) was prepared by vacuum arc-melting under argon atmosphere, andthe 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 majorphases were found in different conditions; (Fe, Co)-rich phase, Cu-rich phase, and homogenized solid solution phase. ThisHEA showed excellent soft magnetic properties (proper saturation magnetization (40 emu/g), low coercivity (7 Oe) and lowmagnetic 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 canbe used as a soft magnetic material in the future.