Mechanical, corrosion and magnetic behavior of a CoFeMn1.2NiGa0.8 high entropy alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第14期
论文作者：Xiaoming Sun Lingzhong Du Hao Lan Jingyi Cui Liang Wang Runguang Li Zhiang Liu Junpeng Liu Weigang Zhang
摘 要：In this study,a magnetic high entropy alloy （HEA） of CoFeMn1.2NiGa0.8was designed and prepared by arc melting in order to investigate its mechanical,corrosion and magnetic behavior.The results show that the alloy mainly possesses body-centered cubic （BCC） phase and face-centered cubic （FCC） phase.A high compressive strength of 1450 MPa,a strain of 18.5% and a relatively low yield strength of 303MPa in as-cast condition at room temperature can be achieved in the present alloy.In-situ high-energy X-ray diffraction technique was employed to reveal the deformation mechanism of Co Fe Mn1.2Ni Ga0.8under uniaxial compression and the results show that the competition between BCC phase and FCC phase plays a significant role during the compressive process.The corrosion behavior of Co Fe Mn1.2Ni Ga0.8was investigated in 3.5 wt%Na Cl solution and it turned out that the alloy possessed good corrosion resistance.At last,the magnetic behavior of the Co Fe Mn1.2Ni Ga0.8alloy was studied and it can present a high saturation magnetization of 94.5 emu/g and a coercivity of 26.4 Oe at 4 K.This work indicates that the present Co Fe Mn1.2Ni Ga0.8HEA has promising applications as future magnetic functional materials.
Xiaoming Sun1，Lingzhong Du1,2，Hao Lan1,2，Jingyi Cui1，Liang Wang3,4，Runguang Li4，Zhiang Liu5，Junpeng Liu6，Weigang Zhang1
1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences3. School of Materials Science and Engineering, Beijing Institute of Technology4. X-ray Science Division, Argonne National Laboratory5. Experimental Teaching and Equipment Management Center, Qufu Normal University6. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences
摘 要：In this study,a magnetic high entropy alloy （HEA） of CoFeMn1.2NiGa0.8was designed and prepared by arc melting in order to investigate its mechanical,corrosion and magnetic behavior.The results show that the alloy mainly possesses body-centered cubic （BCC） phase and face-centered cubic （FCC） phase.A high compressive strength of 1450 MPa,a strain of 18.5% and a relatively low yield strength of 303MPa in as-cast condition at room temperature can be achieved in the present alloy.In-situ high-energy X-ray diffraction technique was employed to reveal the deformation mechanism of Co Fe Mn1.2Ni Ga0.8under uniaxial compression and the results show that the competition between BCC phase and FCC phase plays a significant role during the compressive process.The corrosion behavior of Co Fe Mn1.2Ni Ga0.8was investigated in 3.5 wt%Na Cl solution and it turned out that the alloy possessed good corrosion resistance.At last,the magnetic behavior of the Co Fe Mn1.2Ni Ga0.8alloy was studied and it can present a high saturation magnetization of 94.5 emu/g and a coercivity of 26.4 Oe at 4 K.This work indicates that the present Co Fe Mn1.2Ni Ga0.8HEA has promising applications as future magnetic functional materials.
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