Numerical Modeling of Microstructure Evolution in Alloy Solidification

Abstract

During the last two decades, extensive efforts have been dedicated to develop numerical models to simulate the microstructures of solidification. In this paper, the cellular automaton and lattice Boltzmann based models are presented. The models can produce a graphic output of microstructure evolution, transforming the computer into a dynamic microscope. The capabilities of the models are addressed by presenting examples encompassing a broad variety of issues such as dendritic growth in two and three dimensions, the formation of hydrogen pores in aluminum castings, and the effect of convection on dendritic solidification. Also presented is liquid phase separation in monotectic alloys.