Thermodynamic properties of refractory Mo-Nb-V-Ti high entropy alloys (HEAs)

Abstract

High entropy alloys (HEAs) are solid solution alloys containing at least 5 elements in equiatomic or near-equiatomic composition. In the present study we report on an alloy design route for refractory HEAs based on Mo-Nb-V-xTi alloys (x denotes mole per cent of Ti, x = 5, 10, 15, 20, 25, the mole per cents of Mo, Nb, and V are equal). The thermodynamic activities of Ti and V were determined by Knudsen effusion mass spectrometry and the measured data were compared to the calculated data obtained by CALPHAD method.