Melting and resolidification of a mixture of two metal powders with significantly different melting points under irradiation of a stationary or a moving Gaussian laser beam were investigated numerically and experimentally. The liquid motion driven by capillary and gravity forces as well as the shrinkage of the powder bed caused by the overall density change were taken into account in the physical model. The liquid flow was formulated by using Darcy’s law, and the energy equation was given using a temperature transforming model. Prediction were compared with experimental results obtained with nickel braze and AISI 1018 steel powder. The effects of laser properties and the scanning velocity on the laser sintering process were also investigated. An empirical correlation that can be used to predict the cross-sectional area of the heat affected zone is proposed. [S0022-1481(00)70201-5]
Three-Dimensional Sintering of Two-Component Metal Powders With Stationary and Moving Laser Beams
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER, Manuscript received by the Heat Transfer Division, Jan. 22, 1999; revision received, July 16, 1999. Associate Technical Editor: F. Cheung.
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Zhang, Y., Faghri, A., Buckley , C. W., and Bergman, T. L. (July 16, 1999). "Three-Dimensional Sintering of Two-Component Metal Powders With Stationary and Moving Laser Beams ." ASME. J. Heat Transfer. February 2000; 122(1): 150–158. https://doi.org/10.1115/1.521445
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