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- W3128709537 abstract "Previous studies on the mechanism of laser polishing were limited to the melting regime, this paper proposed a numerical model for the melting and transition regimes of laser polishing, which coupled heat transfer, fluid flow, and material vaporization. Based on the model, the evolution of the temperature and velocity fields of the molten pool in laser polishing was presented. And the mechanism of surface topography evolution was revealed from the perspective of surface forces (capillary force, thermocapillary force, and recoil pressure), fluid velocity, and material removal. Furthermore, the corresponding relationships between surface forces, fluid velocity, and surface topography were determined. The contributions of surface forces and vaporization front velocity in laser polishing were investigated, and the reason for the formation of the bulge structure and the influence of laser power on it were analyzed. And the velocity direction change points which have a great influence on the surface evolution were found, and the method to determine the positions of these points was proposed. Besides, the surface roughness prediction after laser polishing was tried through the numerical model, and the maximum error between the predicted results and the experimental results is 14.9%. Therefore, this model can be used to optimize process parameters." @default.
- W3128709537 created "2021-02-15" @default.
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- W3128709537 date "2021-07-01" @default.
- W3128709537 modified "2023-10-14" @default.
- W3128709537 title "Study on the mechanism of surface topography evolution in melting and transition regimes of laser polishing" @default.
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- W3128709537 doi "https://doi.org/10.1016/j.optlastec.2021.106947" @default.
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