Tracer carbon diffusion in austenite was formulated in terms of a fcc lattice gas model in which carbon interstitials repel at the distance of nearest neighbors. A Monte Carlo method was used to calculate the tracer carbon diffusivity as a function of composition and interaction energy. The computed diffusivities were discussed in relation to the experimentally determined diffusivities and the results of a model investigated by Parris and McLellan.

Computer Simulation of the Carbon Diffusivity in Austenite. G.E.Murch, R.J.Thorn: Journal of Physics and Chemistry of Solids, 1979, 40[5], 389-91