Research progress in high entropy alloy matrix composites

Abstract

High entropy alloys have been proposed in 2004, which are expected to be widely used in aerospace, petrochemical and other fields due to their excellent properties compared with the traditional alloys, and have become a hot spot in current metal material research. It has become one of the methods to improve the comprehensive properties of high entropy alloys by introducing suitable reinforcement phase into the high entropy alloy matrix, and to form high entropy alloy matrix composites (HEAMCs). In this review, according to the current research status in HEAMCs at home and abroad in the past few years, the reinforcement phase selection, preparation method, phase structure, microstructure and strengthening mechanism of HEAMCs were systematically introduced, and the evolution of properties of HEAMCs were summarized, including strength and plasticity, hardness, wear resistance and corrosion resistance. Finally, the challenges to HEAMCs were discussed and future research directions in HEAMCs were suggested.The wettability between the reinforcement phase and the matrix seriously affects the preparation and performance of large-scale composites, and finding an efficient and simple method to prepare large-scale composites is a problem that needs to be solved in high-entropy alloy matrix composites; reinforcing particles will lead to a decrease in plasticity, and the balance between strength and plasticity of metal matrix composites also needs to be studied.

Keywords

• high entropy alloy matrix composites
• reinforcement phase
• preparation process
• phase structure
• strength and plasticity
• strengthening mechanism