Numerical Simulation of the Structure Formation and Crystallization of Foamed Aluminum Modified by Nanosized Particles

A mathematical model of crystallization of a foamed aluminum melt (Al–Si) containing modifying nanoscale particles, which is cooled under given heat removal conditions, is proposed. A numerical analysis of the formation dynamics of foamed metal has been performed, and the spherical pore sizes have been determined using a model of gas bubble growth in an aluminum melt. The boundaries of the cells surrounding the bubbles are defined in accordance to the experimental data available in the literature. The developed model demonstrates that the incorporation of nanosized refractory particles into the melt as modifying additives results in the crystal structure refinement and can contribute to the enhancement of the mechanical properties of the solidified metal.