Prediction of Dendritic Microstructure Using the Cellular Automaton – Finite Element Method for Hypoeutectic Al-Si Alloys Castings

Abstract

In the present paper the description of Al-Si alloy structure modeling using the Cellular Automaton – Finite Element method was briefly presented. This method was adopted to predict the pseudo-dendritic grain microstructure arising during solidification process of castings. Testing of this casting was connected with an attempt of validation of the Calcosoft System (CS-CAFE). Applications are given for prediction of grains size, columnar-to-equiaxed transition (CET) zones for hypoeutectic Al-Si alloys for cylindrical castings which solidify in homogeneous mould and also in moulds containing the chill. Validation has been carried out using a simulation-experiment method under various conditions of thermal interaction between the casting and mould. The results of metallographic studies of experimental casting structure have been adjusted to CAFE prognosis, i.e. simulation structure.