A4 Refereed article in a conference publication
Investigating the Effect of Laser Power and Scanning Strategy on Porosity in PBF-LB of 316L Stainless Steel
Authors: Miri Beidokhti, Mojtaba; Tolvanen, Einari; Rasheed, Anum; Piili, Heidi
Editors: Nadimpalli, Venkata Karthik; Mohanty, Sankhya; Jensen, Dorte Juul; Defer, Marion Caroline; Pan, Zhihao
Conference name: Nordic Laser Materials Processing Conference
Publisher: IOP Publishing
Publication year: 2025
Journal: IOP Conference Series: Materials Science and Engineering
Book title : 20th Nordic Laser Materials Processing Conference
Article number: 012021
Volume: 1332
ISSN: 1757-8981
eISSN: 1757-899X
DOI: https://doi.org/10.1088/1757-899X/1332/1/012021
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Open Access publication channel
Web address : https://doi.org/10.1088/1757-899x/1332/1/012021
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/505438015
This study aims to investigate the influence of laser power and scanning strategy on the formation of macro-scale pores in laser-based powder bed fusion of metals (PBFLB/M) for the manufacturing of 316L stainless steel. Samples were fabricated with varying laser powers and scanning strategies, and their porosity levels were analysed using optical microscopy and image analysis techniques. Volumetric energy density (VED) has been widely employed in previous studies as a comparative tool for integrating process parameters; however, its simplifications can obscure the influence of individual factors. In this study, laser power was found to have a significant effect on porosity formation, with an optimal VED value of 93 J/mm(3) minimizing defects. However, the impact of scanning strategy on porosity was inconclusive due to limited data. Future studies should focus on expanding the dataset to further assess scanning strategies and explore advanced methods to mitigate porosity-related defects, aiming to improve the reliability and performance of additively manufactured components.
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Funding information in the publication:
The authors gratefully acknowledge the support of the Department of Mechanical and Materials Engineering at the University of Turku for providing the facilities and resources necessary to carry out this research.
