On the single phase fcc solid solution in nanocrystalline Cr-Nb-Ti-V-Zn high-entropy alloy

Abstract A single phase fcc solid solution, with a lattice parameter of 4.20±0.01 A and a crystallite size of 7±2 nm (TEM), has been observed in an equiatomic nanocrystalline Cr-Nb-Ti-V-Zn high-entropy alloy during mechanical alloying. Uniqueness of this work is that an fcc solid solution was observed in a system where none of the elements is fcc. This system obeys the guiding principles laid down for high entropy alloys based on atomic size difference, ΔH mix and ΔS mix . However it does not obey the guidelines based on valence electron concentration.