Effect of High Magnetic Field on Magnetic Property of AlCoCrCuFeNi High-Entropy Alloy

Author of the article:DENG Ni, YAN Yujie, ZHAO Yong, WEI Chen, HE Yixuan, WANG Jun

Author's Workplace：State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China

Key Words：high-entropy alloy; magnetic field heat treatment; magnetic property; phase transition

Abstract：The microstructure and magnetic properties of AlCoCrCuFeNi high-entropy alloy during magnetic field heat treatment were studied. The reason of magnetic property change was analyzed in terms of atomic solution and phase transition. The results show that magnetic field heat treatment can significantly optimize the magnetic properties of the alloy in a shorter time than that without magnetic field. In the dual-phase AlCoCrCuFeNi high-entropy alloy, applying magnetic field heat treatment does not lead to the change of lattice constants of FCC phase and BCC phase and the change of magnetic elements content in each phase is less than 1% compared with that heat treated without magnetic field. However, applying magnetic field heat treatment promotes the FCC-BCC phase transition and changes the atomic spacing compared with non-magnetic field heat treatment. The saturation magnetization reaches 35.87 emu/g when the alloy is heat treated for 30 h with 10 T magnetic field, which is about 24.9% higher than that without magnetic field.