Phase field modeling of multiple dendrite growth of Al-Si binary alloy under isothermal solidification

摘要

Phase field method offers the prospect of being able to perform realistic numerical experiments on dendrite growth in metallic systems.In this study,the growth process of multiple dendrites in Al-2-mole-%-Si binary alloy under isothermal solidification was simulated using phase field model.The simulation results showed the impingement of arbitrarily oriented crystals and the competitive growth among the grains during solidification.With the increase of growing time,the grains begin to coalesce and impinge the adjacent grains.When the dendrites start to impinge,the dendrite growth is obviously inhibited.