Simulation on Dendrite Growth of Fe-C Alloy in Isothermal Solidification by Phase Field Method

The phase-field method which was coupled with solute-field based on KKS model was used to simulate dendrite growth and solute distribution of Fe-0.5mol%C alloy.The results show that,the chief spindle of dendrite develops well.The growth of secondary dendrites is perpendicular to the chief spindle of dendrite;the growth of the secondary dendrites is paralleled to each other,however,there is serious competitive growth between secondary dendrite.The constriction appears in the dendrite root.With the secondary dendrite growing,the third dendrite develops.The solute concentration of the solid phase is lower in comparison with that of liquid phase during solidification.And it can find solute beneficiation phenomenon in the interface between solid and liquid phase.The solute concentration curve is consistent with the morphology of dendrites.