Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 12: Growth

MM 12.1: Vortrag

Montag, 26. März 2007, 16:15–16:30, H6

Growth History of Single Grains in 3D Normal Grain Growth — •Dana Zöllner and Peter Streitenberger — Otto-von-Guericke-Universität Magdeburg, Institut für Experimentelle Physik, Abteilung Materialphysik, PF 4120, D-39016 Magdeburg

A 3D grain growth model is presented, which allows the prediction of the growth history of single grains. The model is based on a generalised mean-field approach resulting in an analytic grain size distribution function that represents the data of three dimensional grain growth - simulated with a large 3D Monte Carlo Potts model algorithm - very well. The parameters from the obtained grain size distribution are then used to calculate an analytic function representing the further growth history by showing the temporal development of the grain radius for a fixed but selectable initial grain size. The results are compared with the 3D Monte Carlo simulation giving very good agreement. Furthermore, the life spans of single grains are calculated as a function of their size showing again a good agreement with the simulation results.