文章基本信息

标题：Droplet impact-induced molten pool dynamics and particle migration patterns during TIG-assisted droplet deposition manufacturing of SiC particle-reinforced Al–Si alloy
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作者：Jun Du ; Yunxiao Wu ; Daqing Wang 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2022
卷号：33
页码：101962
语种：English
出版社：Elsevier B.V.
摘要：A three-dimensional droplet-pool coupled model with dispersed phase was developed to simulate the TIG-assisted droplet deposition manufacturing (DDM) of silicon carbide (SiC) particle-reinforced aluminum (Al) matrix composites (AMCs), which was employed to calculate the surface morphology of the deposited layer, the thermal-flow fields and the distribution state of reinforcing particles in the molten pool. The cross-section profile of a single-track SiC-reinforced AMC deposit and the distribution state of reinforcements were examined and compared with the findings predicted by simulation, a good agreement was achieved. It is found that the falling Al droplet produces an obvious crater on the curved surface of molten pool. The viscous damping and simultaneous solidification are the main factors that dissipate the kinetic energy of the droplet. In addition, we discuss quantitatively how impact-induced thermodynamic within molten pool can change the migration behaviors and the distribution state of SiC reinforcement. The heterogeneous distribution of reinforcement particles can be attributed to the thermocapillary micro-convection and the velocity difference in the spreading and recoiling stages.
关键词：TIG-Assisted droplet deposition manufacturing Aluminum matrix composites Molten pool Reinforcing particle