Effect of Alloying Elements, Phases and Heat Treatments on Properties of High-Entropy Alloys: A Review

High-entropy alloys (HEAs) have attracted many researchers in the last few decades due to their remarkable properties like high strength, hardness, corrosion resistance, good formability, etc. The present review is based on the mechanical properties of HEAs, as it is important to know the relevant properties of any alloy before selecting it for any application. This review accentuates on the factors affecting the mechanical properties (tensile strength, compressive strength, hardness) of HEAs such as alloying elements, phases and heat treatment. Moreover, it is also endeavored to unfold research gaps pertinent to this domain. Consequently, it is deduced that there is very limited volume of literatures in the fields of vibration, hot tensile and creep incorporating potential alloying elements such as zinc and boron with HEAs. Also, there is scarcity of literature on determination of tensile properties of HEAs. Further, HEAs can be strengthened by implementing potential strengthening mechanisms like oxide dispersion strengthening.