Abstract: A self-adjusting eutectic growth model with time is presented on the basis of the effect of temperature gradient on eutectic growth and a curved solid-liquid interface. Finite differential method (FDM) is adopted to solve the model. The average interlamellar spacings of the Al-Al3Fe in Al-2%Fe eutectic alloy and the concentration fields ahead of the solid fying interface are calculated. Unidirectional solidification experiments are carried out in order to demonstrate the correction of the modelling. The experimental results are in relatively good agreement with calculations.

Key words: Al-Fe eutectic alloy, Growth rate, Interlamellar spacing, Numerical modelling