High entropy alloy (HEA) is a novel metallic material that has emerged for 20 years. Its frontier research involves a multidisciplinary fusion of materials science, physics, chemistry, mechanics, and computational science. The high-temperature high entropy alloy, discovered in the last decade, is of great significance in the field of material science innovation development and engineering application. Affected by four effects including high entropy effect, lattice distortion effect, hysteresis diffusion effect, and cocktail effect, the high-temperature HEA has the characteristics of high strength, high hardness, high wear resistance, high-temperature resistance, and corrosion resistance. Herein, a series of recent scientific and technological achievements in high-temperature HEAs are reviewed in terms of definition, formation mechanism, material system design, and overall performance of high-temperature HEAs. Some problems are analyzed. The complexity of the extreme service environment and the correlation between material calculation design and high-temperature HEA performance are pointed out. Top ten scientific problems in the research are summarized. Finally, the future development trend and application prospects of hightemperature HEAs are presented.

High-temperature  /  High entropy alloy  /  Mechanical properties  /  Aerospace  /  Computational simulation