High-entropy intermetallic compound with ultra-high strength and thermal stability

The current research of high-entropy alloys (HEAs) is mainly focused on simple solid-solution alloys or alloys with precipitation strengthening phases. In the present work, we developed a series of high-entropy intermetallic compounds (HEICs). In particular, the multi-principal element Fe0.75Co0.75Ni0.75Cu0.75TiZrHf with B2 ordering shows an ultrahigh compressive yield strength of 2.25 GPa and a fracture strength of 2.52 GPa. The developed HEIC...