Cellular Automata Modeling of Two Discontinuous Reactions in Fe-13.5 At. Pct Zn Alloy During Ageing and Annealing

This paper presents a 2D discrete modeling approach for studying two discontinuous reactions, precipitation and dissolution, during the ageing and annealing of a Fe-13.5 at. pct Zn alloy. The cellular automata (CA) method coupled with an analytical solution of the mass transport equations is employed to simulate the behavior of the migrating reaction front and changes in chemical composition within a lamellar modeling system. The developed CA model enables numerical simulation of these phase transformations under conditions defined by experimental data and optimized kinetic parameters. The simulations successfully capture the microstructure evolution, interface migration, solute redistribution, and the go-and-stop motion phenomenon during the movement of the reaction front. The results obtained from the CA simulations provide detailed insights into the influence of kinetic parameters on the formation of zinc concentration profiles.