ICAMS / Interdisciplinary Centre for Advanced Materials Simulation


Modelling of solid-solid phase transformations in aluminium alloys

Date: 07.08.2008

Igor Kovacevic, University of Nova Gorica, Nova Gorica, Slovenia

The solid-solid phase transformations during the homogenisation of aluminium alloys are modelled and simulated by the phase-field model. A comparison of the phase-field model with the two-domain approach for the validation of both models is performed in one-dimensional geometry. Special attention is paid to the connection of the physical models with thermodynamic database. The spheroidisation kinetics of elongated Si-particle is estimate by the phase-field model. The model is applied on the dissolution kinetics the interdendritic, artificial eutectic phase in the aluminium matrix in Al-C alloy. The Gibbs free energy of homogenous eutectic phase is calculated a the heterogeneous mixture of eutectic phases present. The solution procedure based on the local collocation with radial basis functions on the r-adaptive node arrangement for the solution of governing equations of the phase-field model is derived.

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