Berlin 2018 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 32: Microstructure and Phase Transformations

MM 32.1: Talk

Wednesday, March 14, 2018, 10:15–10:30, TC 010

Multi Scale Modelling of the Size Evolution of Precipitate Clusters — •Tobias Stegmüller and Ferdinand Haider — Universität Augsburg, Institut für Physik, 86135 Augsburg

Precipitation processes in modern aluminium alloys are due to their significance for mechanical properties of great technical interest. The choice of an appropriate heat treatment, which evolves the distribution of precipitates in space, is the key that influences material parameters like strength, hardness and corrosion resistance.

The size distribution of precipitates during heat treatments is an important function for the characterisation of the temper state. In this work we will present a multi scale approach covering DFT, Cluster Expansion Monte Carlo simulations and the so-called Cluster Dynamics which directly calculates the evolution of the precipitate size distribution. The model was applied to the formation of Guinier-Preston zones in Al-Cu alloys and the results will be presented.