Fig. 1: The database structures of selected alloy systems, and distribution of physicochemical properties of candidate B2-forming elements.

a Quinary Fe-Co-Ni-Ti-Zr system database. b Quaternary Co-Ni-Ti-Zr system database. c Senary Cu-Co-Ni-Ti-Zr-Hf system database. d The mixing enthalpy Hij (kJ/mol) between candidate elements104. e Atomic radius ri (Å), electronegativity χi and valence electrons number VECi.