Abstract
Strong static magnetic field (SSMF) is a unique way to regulate the microstructure and improve the properties of materials. FeCoNi(AlSi)0.2 alloy is a novel class of soft magnetic materials (SMMs) designed based on high-entropy alloy (HEA) concepts. In this study, a strong static magnetic field is introduced to tune the microstructure, mechanical, electrical and magnetic properties of FeCoNi(AlSi)0.2 high-entropy alloy. Results indicate that, with the increasing magnetic field intensity, the Vickers hardness and the saturation magnetization (Ms) increase firstly, and then decrease and reach the maximum at 5T, while the yield strength, the residual magnetization (Mr) and the coercivity (Hc) take the opposite trend. The resistivity values (ρ) are found to be enhanced by the increasing magnetic field intensity. The main reasons for the magnetic field on the above effects are interpreted by microstructure evolution (phase species and volume fraction), atomic-level structure and defects (vacancy and dislocation density).
Highlights
Over the past decades, high-entropy alloys (HEAs) in which their distinctive structures and excellent properties are being continuously explored have attracted extensive attention [1,2,3,4,5,6,7,8,9,10].HEAs are a novel kind of alloys because they are different from conventional alloys that have one or two principal elements as main components
FeCoNi(AlSi)0.2 alloy is a novel class of soft magnetic materials (SMMs) based on HEAs
Strong static magnetic field (SSMF) is introduced during the solidification process of FeCoNi(AlSi)0.2 HEA, and its effect on the microstructure evolution and properties are studied
Summary
High-entropy alloys (HEAs) in which their distinctive structures and excellent properties are being continuously explored have attracted extensive attention [1,2,3,4,5,6,7,8,9,10]. Strong static magnetic field (SSMF) has aroused extensive interest due to its unique function in materials processing. In the existing literature reports, the role of strong magnetic field in the solidification process focuses on pure metal [20,25], binary alloy system [15,16,17,25]. Few articles have the application of SSMF during the solidification of HEAs. FeCoNi(AlSi)0.2 alloy is a novel class of soft magnetic materials (SMMs) based on HEAs. SMMs require high Ms , high ρ, low Hc and low Mr , in addition to good malleability [26]. SSMF is introduced during the solidification process of FeCoNi(AlSi)0.2 HEA, and its effect on the microstructure evolution and properties are studied
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