A three-dimensional model of selective laser sintering of a two-component loose metal powder layer on top of previously sintered layers by a single-line laser scanning is presented. A temperature-transforming model is employed to model melting and resolidification accompanied by partial shrinkage during laser sintering. The heat losses at the top surface due to natural convection and radiation are taken into account. The liquid flow of the molten low-melting-point metal powders, which is driven by capillary and gravity forces, is also considered and formulated by using Darcy’s law. The effects of the dominant processing parameters, such as laser-beam intensity, scanning velocity, and number of the existing sintered layers underneath, are investigated.
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e-mail: zhangyu@missouri.edu
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June 2007
Technical Papers
Three-Dimensional Modeling of Laser Sintering of a Two-Component Metal Powder Layer on Top of Sintered Layers
Tiebing Chen,
Tiebing Chen
Department of Mechanical and Aerospace Engineering,
University of Missouri-Columbia
, Columbia, MO 65211
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Yuwen Zhang
Yuwen Zhang
Department of Mechanical and Aerospace Engineering,
e-mail: zhangyu@missouri.edu
University of Missouri-Columbia
, Columbia, MO 65211
Search for other works by this author on:
Tiebing Chen
Department of Mechanical and Aerospace Engineering,
University of Missouri-Columbia
, Columbia, MO 65211
Yuwen Zhang
Department of Mechanical and Aerospace Engineering,
University of Missouri-Columbia
, Columbia, MO 65211e-mail: zhangyu@missouri.edu
J. Manuf. Sci. Eng. Jun 2007, 129(3): 575-582 (8 pages)
Published Online: December 18, 2006
Article history
Received:
May 12, 2006
Revised:
December 18, 2006
Citation
Chen, T., and Zhang, Y. (December 18, 2006). "Three-Dimensional Modeling of Laser Sintering of a Two-Component Metal Powder Layer on Top of Sintered Layers." ASME. J. Manuf. Sci. Eng. June 2007; 129(3): 575–582. https://doi.org/10.1115/1.2716714
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