Monte Carlo Simulations of Mossbauer results in Fe-C austenite

The Mossbauer signal of Fe-C austenite is difficult to interpret because different Fe-C configurations give rise to different hyperfine interactions. Two competing models for the distribution of carbon atoms in the fcc austenite lattice have been proposed to account for Mossbauer spectra. Both models assume a repulsive C-C interaction of different magnitude and different Fe-C configurations. From the Mossbauer spectra, the abundance of the different iron sites could be determined. That abundance may also be calculated with Monte Carlo simulations. In this work, using the two controversial models, we compare the relative fractions of the Fe-C configurations obtained from Mossbauer spectra of vermicular austempered cast iron with Monte Carlo simulation.