Numerical simulation on rapid melting and
nonequilibrium solidification of pure metals and binary alloys
nonequilibrium solidification of pure metals and binary alloys
(1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing,Beijing 100083, China;
2. Shenyang National Laboratory for Material Research, Institute of Metal Research,
Chinese Academy of Sciences, Shenyang 110015, China)
2. Shenyang National Laboratory for Material Research, Institute of Metal Research,
Chinese Academy of Sciences, Shenyang 110015, China)
Abstract: A heat and mass transfer modelling containing phase transformation dynamics is made for pure metals and binary alloys under pulsed laser processing. The nonequilibrium effects of processing parameters and physical properties are evaluated on the melting and solidification of pure metals (Al, Cu, Fe and Ni) and Al-Cu alloys. It is shown that the energy intensity of laser beam and physical properties of metals and the solute concentration of alloys have important effect on the interface temperature, melting and solidification velocity, melting depth and non-equilibrium partition coefficient. This situation is resulted from the interaction of heat transfer, redistribution of solute, solute trapping and growth kinetics.
Key words: rapid melting; nonequilibrium solidification; pulsed laser processing; heat and mass transfer; growth kinetics