Numerical simulation on rapid melting and nonequilibrium solidification of pure metals and binary a

• 作 者: 惠希东 陈国良 杨院生 胡壮麒
• 机 构: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijin
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2002年06期
• 关键词: solidification melting

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.

A heat and mass transfer modeling 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 in the energy intensity of laser beam and physical properties of metals and the solute concentration of alloys that important effect on the interface temperature, melting and solidification velocities, melting depth and non equilibrium pressure coefficient. is resulted from the interaction of heat transfer, redistribution of solute, solute trapping and growth kinetics.