Phase-field simulation of dendritic growth in a binary alloy with thermodynamics data

This paper simulates the dendrite growth process during non-isothermal solidification in the Al-Cu binary alloy by using the phase-field model. The heat transfer equation is solved simultaneously. The thermodynamic and kinetic parameters are directly obtained from existing database by using the Calculation of Phase Diagram （CALPHAD） method. The effects of the latent heat and undercooling on the dendrite growth, solute and temperature profile during the solidification of binary alloy are investigated. The results indicate that the dendrite growing morphologies could be simulated realistically by linking the phase-field method to CALPHAD. The secondary arms of solidification dendritic are better developed with the increase of undercooling. Correspondingly, the tip speed and the solute segregation in solid-liquid interface increase, but the tip radius decreases.

Phase-field simulation of dendritic growth in a binary alloy with thermodynamics data

This paper simulates the dendrite growth process duringnon-isothermal solidification in the Al--Cu binary alloy by using thephase-field model. The heat transfer equation is solvedsimultaneously. The thermodynamic and kinetic parameters are directlyobtained from existing database by using the Calculation of PhaseDiagram (CALPHAD) method. The effects of the latent heat andundercooling on the dendrite growth, solute and temperature profileduring the solidification of binary alloy are investigated. Theresults indicate that the dendrite growing morphologies could besimulated realistically by linking the phase-field method to CALPHAD.The secondary arms of solidification dendritic are better developedwith the increase of undercooling. Correspondingly, the tip speed andthe solute segregation in solid--liquid interface increase, but thetip radius decreases.