Peculiarities of Nanoscale α’-phase Precipitation in Fe-Cr-Al Alloys During Thermal Treatment

A generalized phase field model to simulate the dynamics of microstructural transformations in iron-based ${Fe}-{Cr}-{Al}$ alloys, incorporating the dynamics of equilibrium point defects is developed. The study of the formation and growth processes of chromium-enriched precipitates of the $\alpha^{\prime}$ phase during prolonged annealing of solid solution is provided. The impact of alloying element concentration and annealing temperature on the dynamic and statistical characteristics of the growing precipitates is examined. The scaling dynamics of the average precipitate size, their number, and the universality of their distribution over sizes are demonstrated.