Modeling the Effect of Beam Shaping at Selective Laser Melting

Abstract:

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The influence of the laser-beam radial distribution of the energy flux density is theoretically studied for the Gaussian distribution (mode TEM00), and doughnut distribution of TEM01* mode for the values of the Peclet number from 0 to 3. The model of linear thermal conduction in the target indicates that profile TEM00 is the best for thermo-activated treatment processes that can be accomplished in a wide temperature range and profile TEM01* can be advantageous for a narrow range of the permissible processing temperature. If the phase transitions of melting/solidification and evaporation are included into the model, the estimate of the width of the laser-treated band is reduced but the tendencies predicted by the linear model are not changed.

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Periodical:

Edited by:

S.N. Grigoriev

Pages:

85-92

DOI:

10.4028/www.scientific.net/MSF.834.85

Citation:

C. E. Protasov and A. V. Gusarov, "Modeling the Effect of Beam Shaping at Selective Laser Melting", Materials Science Forum, Vol. 834, pp. 85-92, 2015

Online since:

November 2015

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$35.00

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