An efficient steady-state thermal model for predicting the lack-of-fusion porosity during laser powder bed fusion process

An efficient steady-state thermal model for predicting the lack-of-fusion porosity during laser powder bed fusion process

JIA Yabo, SAADLAOUI Yassine, BERGHEAU Jean-Michel

Abstract. The lack-of-fusion porosity due to the incomplete melting of the powder should be avoided during laser powder bed fusion (LPBF) process. The porosity will reduce the performance of mechanical properties. In certain manufacturing processes, the thermal and metallurgical quasi-steady-state can be reached quickly. In this article, a steady-state model, incorporating new dedicated boundary conditions, is proposed and applied in the multi-track simulation of LPBF to control porosity. Various processing parameters, such as hatching space and cooling time inter-pass can be investigated. The transient step-by-step simulation is also employed as the numerical reference. Numerical comparisons demonstrate that the proposed steady-state model achieves a relative good agreement with the numerical reference while significantly reducing computing time (2-3 minutes).

Keywords
Steady-State Model, Lack-of-Fusion, Laser Powder Bed Fusion

Published online 4/24/2024, 8 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: JIA Yabo, SAADLAOUI Yassine, BERGHEAU Jean-Michel, An efficient steady-state thermal model for predicting the lack-of-fusion porosity during laser powder bed fusion process, Materials Research Proceedings, Vol. 41, pp 345-352, 2024

DOI: https://doi.org/10.21741/9781644903131-39

The article was published as article 39 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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