Numerical modeling of sintering of two-component metal powders with laser beams

V. G. Niziev; A. V. Koldoba; F. Kh. Mirzade; V. Ya. Panchenko; Yu. A. Poveschenko; M. V. Popov

doi:10.1117/12.881336

17 February 2011 Numerical modeling of sintering of two-component metal powders with laser beams

V. G. Niziev, A. V. Koldoba, F. Kh. Mirzade, V. Ya. Panchenko, Yu. A. Poveschenko, M. V. Popov

Proceedings Volume 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies; 79941W (2011) https://doi.org/10.1117/12.881336
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

Abstract

Direct laser sintering of a mixture of two metal powders with significantly different melting points is investigated by numerical simulation. The model is based on self-consistent non-linear continuity equations for volume fractions of components and on energy transfer equations for the powder mixture. It includes the movement of the solid particles due to shrinkage because of the density change of the powder mixture and the liquid flow driven by the capillary and gravity forces. The liquid flow is determined by Darcy's law. The effect of surface settlement of the powder is obtained. The width increasing rate of the melting zone depend both on the parameters of the laser radiation (on the power of the beam) and on the physical parameters of the particle's material, and it increases with the increasing of the penetrability or the increasing of the phase-transition heat. The increasing of the laser power under other factors being equal results in the acceleration of the melting front propagation.

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V. G. Niziev, A. V. Koldoba, F. Kh. Mirzade, V. Ya. Panchenko, Yu. A. Poveschenko, and M. V. Popov "Numerical modeling of sintering of two-component metal powders with laser beams", Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941W (17 February 2011); https://doi.org/10.1117/12.881336

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