Microstructure and properties of FeCrMnAlxCu(2－x) high-entropy alloys

Abstract

Abstract: FeCrMnAl_xCu_(2－x)(x=1.3, 1.4, 1.5, 1.6, 1.7) high-entropy alloys (HEAs) was prepared by vacuum arc melting technology, and the influence of Al and Cuon the microstructure, mechanical properties, and tribological behavior of FeCrMnAl_xCu_(2－x) HEAs was investigated. The results revealed that FeCrMnAl_xCu_(2－x) HEAs is BCC solid solution structure. The microstructure of the alloys consist of dendritic structure. With increasing x, the yield strength gradually increase and reach a maximum value of 1 092.31 MPa at x=1.5. Both compressive strength and deformation rate exhibit a decreasing trend with increasing x, reaching their maximum values at x=1.3, which are 1 517.84 MPa and 43.36%, respectively. The FeCrMnAl_1.7Cu_0.3HEA exhibit a maximum microhardness of 559.9 HV. The minimum wear rate is found to be 4.70×10^－6mm³·N^－1·m^－1. As x increased, the dominant wear mechanisms in the alloy are primarily abrasive wear, adhesive wear, and oxidative wear.

Key words: vacuum arc melting, high-entropy alloys, microstructure, mechanical properties

CLC Number:

TG146

LI Da-peng, DENG Guo-hui, WU Zhi-guo, XUAN Rui. Microstructure and properties of FeCrMnAl_xCu_(2－x) high-entropy alloys[J]. Journal of Lanzhou University of Technology, 2024, 50(4): 6-11.

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Microstructure and properties of FeCrMnAl_xCu_(2－x) high-entropy alloys

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