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Investigation into the effect of beam shape on melt pool characteristics using analytical modelling

Ahmed, N.; Voisey, K.T.; McCartney, D.G.

Investigation into the effect of beam shape on melt pool characteristics using analytical modelling Thumbnail


N. Ahmed

Associate Professor

D.G. McCartney


An established analytical model is used to simulate an extended laser beam. Multiple Gaussian sources are superimposed to form a rectangular beam and results are compared with a single circular Gaussian source model as well as experimental results from a high power diode laser with a rectangular beam. Melt depth, and melt pool profile and progression have been predicted by modelling which are compared with experimental results from melting of Inconel 625. The model produced is shown to give a reasonable prediction of melt pool shape and can be usefully employed to help optimise overlap required for laser surface processing applications. The value of absorptivity used in the model can be used as a fitting parameter to optimise the match between experimental and predicted results.

Journal Article Type Article
Publication Date Jan 1, 2010
Deposit Date Jan 29, 2015
Publicly Available Date Jan 29, 2015
Journal Optics and Lasers in Engineering
Print ISSN 0143-8166
Electronic ISSN 0143-8166
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 48
Keywords laser
Public URL
Publisher URL
Additional Information NOTICE: this is the author’s version of a work that was accepted for publication in Optics and Lasers in Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Optics and Lasers in Engineering, 48(5),(2010) doi:10.1016/j.optlaseng.2009.12.013


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