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Three-dimensional convection in laser melted pools

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Abstract

Computer simulation was carried out to describe three-dimensional convection in laser melted pools,i.e., for the case where the workpiece is moving with respect to the laser beam. Two different types of driving forces for flow were considered in the model,i.e., the buoyancy force and the surface tension gradient at the pool surface. Laser surface melting of 6063 aluminum alloy was carried out using a continuous-wave CO2 laser, and the power delivered to the workpiece was measured calorimetrically. The calculated and observed fusion boundaries were compared and very good agreement was obtained. Finally, the effect of the surface tension temperature coefficient δγ/δT on the convection pattern and penetration of laser melted pools was demonstrated with the model.

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Authors and Affiliations

  1. Department of Metallurgical and Mineral Engineering, University of Wisconsin, 53706, Madison, WI

    S. Kou (Professor) & Y. H. Wang (Graduate Student)

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  1. S. Kou
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  2. Y. H. Wang
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Kou, S., Wang, Y.H. Three-dimensional convection in laser melted pools. Metall Trans A 17, 2265–2270 (1986). https://doi.org/10.1007/BF02645924

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  • DOI: https://doi.org/10.1007/BF02645924

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