Abstract: High-entropy alloys (HEAs) have been the focus in the field of material research because of their excellent properties such as high strength, high toughness, good wear resistance and corrosion resistance. With in-depth research and understanding of the basic mechanical properties of HEAs, their long-term service performance — fatigue property is attracting more and more interests. According to previous reports, HEAs possess good fatigue resistance thus having great potential as engineering materials. However, the complexities of various HEAs systems along with their preparation processes and microstructures lead to large fatigue scatter. Therefore, it is important to acquire comprehensive understan-ding in order to promote further development of HEAs. In this paper, the latest results of fatigue research in different HEAs are introduced, primarily from the viewpoint of their microstructures. Besides, high-cycle-fatigue and low-cycle-fatigue properties of HEAs as well as the corresponding failure mechanisms are summarized and compared. Finally, existing issues in current research and the prospects of future development are also assessed.
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