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所属单位：材料科学与技术学院

发表刊物：JOM

关键字：MONTE-CARLO-SIMULATION DIRECTIONAL SOLIDIFICATION TRANSIENT CONDITIONS GRAIN-GROWTH ALLOY MICROSTRUCTURE PARAMETERS HEAT

摘要：A phase field model is developed to predict curved dendrite growth in the gas tungsten arc (GTA) welding pool of an Al-Cu alloy. The equations of temperature gradient, pulling velocity and dendrite growth orientation are proposed to consider the transient solidification process during welding. Solidification microstructures and solute diffusion along the fusion boundary in the welding pool are predicted by using the phase field model coupled with transient solidification conditions. Predicted primary dendrites are curved and point toward the welding direction. Welding experiments are carried out to observe solidification microstructures of the weld. Comparisons of simulation results with experimental measurements are conducted. Predicted dendritic morphology, dendrite growth orientation, primary dendrite arm spacing and initial cell spacing give a good agreement with experimental measurements.

ISSN号：1047-4838

是否译文：否

发表时间：2018-05-01

合写作者：Wang,Lei

通讯作者：魏艳红