![]() Great details are provided on the plastic deformation, fracture, and magnetization from the perspectives of crackling noise and Barkhausen noise measurements, and the analysis of serrations on stress–strain curves at specific strain rates or testing temperatures, as well as the serrations of the magnetization hysteresis loops. Physical, magnetic, chemical, and mechanical properties are then discussed. This paper first reviews HEA formation in relation to thermodynamics, kinetics, and processing. Furthermore, the general corrosion resistance of the Cu 0.5NiAlCoCrFeSi HEA is much better than that of the conventional 304-stainless steel. Up to date, many HEAs with promising properties have been reported, e.g., high wear-resistant HEAs, Co 1.5CrFeNi 1.5Ti and Al 0.2Co 1.5CrFeNi 1.5Ti alloys high-strength body-centered-cubic (BCC) AlCoCrFeNi HEAs at room temperature, and NbMoTaV HEA at elevated temperatures. The concept of high entropy introduces a new path of developing advanced materials with unique properties, which cannot be achieved by the conventional micro-alloying approach based on only one dominant element. HEAs are loosely defined as solid solution alloys that contain more than five principal elements in equal or near equal atomic percent (at.%). ![]() This paper reviews the recent research and development of high-entropy alloys (HEAs).
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