The diffusion of Fe, Cr and Ni in one dimension in and between 1- and 2-phase α/γ regions was simulated using independently assessed thermodynamic and kinetic data. Simulation results compare favorably with experimental results obtained previously. For example, the formation of a γ layer between an α and a γ+α region was correctly predicted. Neither phase interfaces nor individual phases were explicitly considered; instead, locally averaged kinetic properties were used and locally minimized Gibbs energy was assumed.

A Homogenization Approach to Diffusion Simulations Applied to α+γ Fe–Cr–Ni Diffusion Couples. H.Larsson, A.Engström: Acta Materialia, 2006, 54[9], 2431-9