1D solidification model for the prediction of microstructural evolution in light alloy

Abstract

As-cast microstructure is important for alloy development. Solidification is a complex process involving both phase diagram information and diffusion kinetics. The present 1D solidification model coupling the CALPHAD-type thermodynamic database and classical solidification theories can reasonably predict the microstructural evolution including solidification path, primary and secondary dendrite arm spacing, microsegregation, and secondary phase fraction. The solidification calculations even in multicomponent system can be calculated in less than a few minutes. The combination of the present solidification model and thermodynamic calculations can be useful for the optimization of casting parameters of existing alloys and the development of new alloys.