Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/89258
Title: Analytical solution of temperature distribution in a nonuniform medium due to a moving laser beam and a double beam scanning strategy in the selective laser melting process
Authors: Loh, Loong-Ee
Song, Jie
Guo, Fenglin
Bi, Guijun
Keywords: Analytical Solution
Selective Laser Melting
DRNTU::Engineering::Aeronautical engineering
Issue Date: 2018
Source: Loh, L.-E., Song, J., Guo, F., & Bi, G. (2018). Analytical solution of temperature distribution in a nonuniform medium due to a moving laser beam and a double beam scanning strategy in the selective laser melting process. Journal of Heat Transfer, 140(8), 082302-. doi:10.1115/1.4040256
Series/Report no.: Journal of Heat Transfer
Abstract: Selective laser melting (SLM) has received increasing attention in recent years as an innovative manufacturing technique. The present SLM process only uses a single laser beam to melt and consolidate the powder, which may result in excessive evaporation. In this paper, a double beam scanning strategy is investigated in which the first laser beam preheats the powder just below the sintering point while the second laser beam completely melts the powder. An analytical solution on the temperature distribution heated by a moving laser beam in the powder-bulk domain is derived and is used to determine the critical radius of the first laser beam. The single and double beam scanning strategies are compared numerically and it is found that double beam scanning can effectively reduce material evaporation and increase the amount of powder melted in the SLM process.
URI: https://hdl.handle.net/10356/89258
http://hdl.handle.net/10220/47692
ISSN: 0022-1481
DOI: 10.1115/1.4040256
Rights: © 2018 ASME. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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