Dresden 2006 – wissenschaftliches Programm

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MM: Metall- und Materialphysik

MM 5: Phase transitions II

MM 5.5: Vortrag

Montag, 27. März 2006, 12:45–13:00, IFW D

Three dimensional normal grain growth: mean-field theory and Monte Carlo Potts model simulation — •Dana Zöllner and Peter Streitenberger — Otto-von-Guericke-Universität Magdeburg, Institut für Experimentelle Physik, Abteilung Materialphysik, PF 4120, D-39016 Magdeburg

Normal grain growth in three dimensions has been studied on the basis of large-scale 3D Monte Carlo Potts model simulations, which enabled an extensive statistical analysis of the growth kinetics and topological properties of the microstructure within the quasi-stationary self-similar coarsening regime. It is shown that three dimensional normal grain growth can adequately be described by an average scaled growth law, which is a quadratic function of the relative grain size. A generalized analytic mean-field theory based on this growth law yields a scaled grain size distribution function that is in excellent agreement with the simulation results. The problem of the existence of a sharp cut-off in the simulated microstructure is discussed.