Development and Property Tuning of Refractory High-Entropy Alloys: A Review

In the past decade, multi-principal element high-entropy alloys (referred to as alloys, HEAs) are an emerging alloy material, which has been developed rapidly and become a research hotspot in field of metal materials. It breaks design concept one or two principal elements traditional alloys. is composed five more elements, atomic percentage (at.%) each greater than 5% but not 35%. The effect caused by increase makes crystals easy form body-centered cubic face-centered structures, may be accompanied intergranular compounds nanocrystals, achieve solid solution strengthening, precipitation dispersion strengthening. optimized composition can make HEAs exhibit much better such high-strength steel, stainless copper-nickel alloy, nickel-based superalloy terms high strength, hardness, high-temperature oxidation resistance, corrosion resistance. At present, refractory (RHEAs) containing high-melting have excellent room temperature properties, their potential application value attracted widespread attention field. This article reviews status preparation methods RHEAs analyzes microstructure system then summarizes various properties RHEAs, including wear etc., common property tuning explained, existing main strengthening toughening mechanisms revealed. knowledge will help on-demand crucial trend future development. Finally, development prospects prospected guide research.