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所属单位：材料科学与技术学院
发表刊物：METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
关键字：CELLULAR-AUTOMATON MODEL TO-EQUIAXED TRANSITION FRONT-TRACKING METHOD PHASE-FIELD LATTICE BOLTZMANN GRAIN-GROWTH SOLIDIFICATION SIMULATION MORPHOLOGIES PREDICTION
摘要：A cellular automaton (CA)-finite difference model is developed to simulate dendrite growth and solute diffusion during solidification process in the molten pool of Al-Cu alloy. In order to explain the interaction between the dendritic growth and solute distribution, a series of CA simulations with different solute diffusion velocity coefficients are carried out. It is concluded that the solute concentration increases with dendrite growing and solute accumulation in the dendrite tip. Converged value of the dendrite tip growth velocity is about 480 mu m/s if the mesh size is refined to 2 mu m or less. Growth of the primary dendrite and the secondary dendrite is mainly influenced by solute diffusion at the dendrite tips. And growth of secondary and tertiary dendrites is mainly influenced by solute diffusion at interdendrite.
ISSN号：1073-5615
是否译文：否
发表时间：2017-10-01
合写作者：Gu, Cheng,刘云鹏,魏艳红
通讯作者：占小红