SLM: Melt-pool prediction through transient thermal simulation

This paper evaluates the accuracy of transient thermal simulations in predicting melt pool geometry, including width and depth, during Selective Laser Melting (SLM) for different laser energy densities (LEDs). While the simulation results show similar trends to experimental data, they exhibit signif...

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Bibliographic Details
Published in:MATEC web of conferences 2024, Vol.406, p.6009
Main Authors: Benson, Gerrit Maritz, Bayode, Abiodun, Koekemoer, Ockert Cornelius
Format: Article
Language:English
Subjects:
Accuracy
Computational fluid dynamics
Errors
Keyholes
Laser beam melting
Marangoni convection
Melt pools
Predictions
Thermal simulation
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Summary:This paper evaluates the accuracy of transient thermal simulations in predicting melt pool geometry, including width and depth, during Selective Laser Melting (SLM) for different laser energy densities (LEDs). While the simulation results show similar trends to experimental data, they exhibit significant accuracy errors, especially at higher LEDs due to the inability to account for keyhole melting caused by the Marangoni effect. Despite these inaccuracies, the simulations remain useful for parameter development if the errors are considered and LEDs that cause keyhole melting are avoided. To achieve more accurate predictions of the melt pool, it is recommended to use a computational fluid dynamics (CFD) approach that includes Marangoni flow and evaporative effects.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/202440606009