Abstract
This work reviews recent progress in the alloy design, microstructure, and mechanical properties of refractory high-entropy alloys (RHEAs). What's more, the underlying strengthening mechanisms and deformation behavior are discussed. Composed mainly of near-equimolar refractory elements, RHEAs have superior mechanical properties, especially at high temperatures. However, many of them have limited room-temperature ductility. Much work has been done to solve this trade-off, and some of the RHEAs have the potential to be used for high-temperature applications in the future. In addition to their mechanical properties, RHEAs have other attractive properties, such as biocompatibility and wear resistance, which are discussed. Finally, current problems and future suggestions for RHEAs are discussed.
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