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• W3203561824 endingPage "122002" @default.
• W3203561824 startingPage "122002" @default.
• W3203561824 abstract "Physical understanding of the scanning electron beam welding (EBW) process and prediction of weld forming quality are always a focus and a challenge in the field of material processing. In this paper, a three-dimensional molten pool model is developed to study the molten pool dynamics during EBW with beam oscillation. The model involves an innovative heat source model that considers the broadening effect of metal vapor on the electron beam radius and direct coupling between the electron beam and keyhole wall. The model is validated by comparing the areas of the weld longitudinal section and weld dimensions from experiments and simulations. In addition, the number of porosity defects in the experimental weld seam is examined to prove the rationality of the theoretical analysis. Based on the molten pool model and the theoretical analysis, a Gaussian process regression (GPR) method for rapidly predicting the weld dimensions and a new method for quantifying the molten pool stability are proposed. Eventually, we propose an innovative and rapid method for selecting welding process parameters. This study is expected to provide a deeper understanding of the scanning EBW process and to improve confidence in optimizing and controlling the actual welding process." @default.
• W3203561824 created "2021-10-11" @default.
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• W3203561824 date "2021-12-01" @default.
• W3203561824 modified "2023-10-16" @default.
• W3203561824 title "Modeling and numerical study of the molten pool dynamics during scanning electron beam welding of aluminum alloys: Physical mechanism, prediction and parameter selection" @default.
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• W3203561824 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2021.122002" @default.
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