Effect of Thermodynamic Stability Parameters on Tracer Diffusion Kinetics in High Entropy Alloys

The high entropy effect and sluggish diffusion postulate that the alloys with higher thermodynamic stability exhibit anomalously slow kinetics. This postulation assumed enthalpy of mixing excess in random single-phase solid solution based (HEAs) are negligible configurational is dominant contributor towards overall stability. highly stable HEAs were to very rugged potential energy landscape characterized by larger fluctuations, which slows down These assumptions, however, challenged several investigations. Therefore, this work investigates dependence tracer kinetics on parameters systematically investigating underlying assumptions effects. FCC was also examined. Findings suggest that: (1) non-ideal behavior because contributes significantly stability; (2) contrary effect, do not always result fluctuations; (3) composition dependent no direct correlation parameters.