Refractory high-entropy alloys for advanced nuclear applications

Compositionally complex alloys (CCAs), including medium- and high-entropy alloys (M/HEAs), can offer exceptional mechanical properties, thermal stability and corrosion resistance, which make them candidate materials for nuclear applications. This project evaluates thermal stability, phase formation and mechanical performance in terms of strength and fracture resistance of an existing TiZrNbHfTa refractory HEA (both irradiated and unirradiated), develops design considerations for HEAs in nuclear environments using advanced nuclear property calculations, and establishes a novel strategy for the development of CCAs that are suitable for future fission and fusion applications.