Modeling the precipitation processes and the formation of hierarchical microstructures in a single crystal high entropy superalloy

Although superior high temperature tensile yield strength of entropy superalloys (HESAs) arises from their hierarchical microstructure, the precipitation processes driving its formation remains unclear. In present study, we analyze kinetics ?’ and ? precipitations by treating concurrent nucleation, growth coarsening using common computational thermodynamic kinetic tools to simulate microstructure genesis evolution in HESA during thermal treatments. The ability simulations reproduce experimentally observed parameters is evaluated. Temperature-time-transformation (TTT) diagrams are calculated serve as guidelines for further optimization HESAs.