Abstract
High-temperature high-entropy alloys（HEAs） show potential to surpass traditional Ni-based alloys through multi-principal element synergy and microstructural regulation. This review systematically examines three systems： high-entropy superalloys（HESAs），refractory HEAs（RHEAs） and refractory high-entropy superalloys（RSAs）. HESAs emulate the γ/γ′ dual-phase structure of Ni-based alloys，achieving comparable strength at 800-1000 ℃. RHEAs utilize refractory elements to form high-melting-point solid solutions with superior performance above 1200 ℃. RSAs innovate with BCC/B2 nanobasket structures，outperforming Ni-based alloys across 25-1200 ℃. Current challenges include poor room-temperature ductility，oxidation resistance and phase stability，demanding breakthroughs in multi-scale microstructure control，dynamic phase transformation mechanisms and high-throughput design. Future directions prioritize multi-objective composition optimization， advanced processing， cross-scale characterization，and service-condition evaluation systems to guide extreme-environment applications like aeroengine components and nuclear reactors，etc.
| Translated title of the contribution | Research progress in high-temperature high-entropy alloys |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 61-77 |
| Number of pages | 17 |
| Journal | Hangkong Cailiao Xuebao/Journal of Aeronautical Materials |
| Volume | 45 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Oct 2025 |