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Article

Fluctuations of Tracks and Layers during Aluminium Laser Powder-Bed Fusion

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Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
2
Department of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Alberto Boschetto
Appl. Sci. 2021, 11(7), 3132; https://doi.org/10.3390/app11073132
Received: 26 February 2021 / Revised: 18 March 2021 / Accepted: 26 March 2021 / Published: 1 April 2021
(This article belongs to the Special Issue Latest Advances in Laser-Based Manufacturing Technologies)
Laser Powder-Bed Fusion (LPBF) is one method in Additive Manufacturing where layer-wise complex structures can be built. However, although the LPBF machines produce promising parts, the efficiency and process speed are typically still low, which can make the process expensive and uneconomical. Recent research showed that volume elements in the parts can be melted several times, while only a small material volume is added, which indicates a high loss of energy. In order to understand the process better, in this work, theoretical modeling and smart powder-bed experiments were designed to explain the impact on the track dimensions based on the previously built tracks and layers. It was found that the powder availability varies for each track and has an alternating character within and between layers. The comparison of the simulation and experimental results indicates that the powder pick-up from neighboring powder volumes is the main reason for the variations of the powder availability. View Full-Text
Keywords: selective laser melting; additive manufacturing; 3D printing; part density selective laser melting; additive manufacturing; 3D printing; part density
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MDPI and ACS Style

Volpp, J.; Belelli, F.; Casati, R. Fluctuations of Tracks and Layers during Aluminium Laser Powder-Bed Fusion. Appl. Sci. 2021, 11, 3132. https://doi.org/10.3390/app11073132

AMA Style

Volpp J, Belelli F, Casati R. Fluctuations of Tracks and Layers during Aluminium Laser Powder-Bed Fusion. Applied Sciences. 2021; 11(7):3132. https://doi.org/10.3390/app11073132

Chicago/Turabian Style

Volpp, Joerg, Filippo Belelli, and Riccardo Casati. 2021. "Fluctuations of Tracks and Layers during Aluminium Laser Powder-Bed Fusion" Applied Sciences 11, no. 7: 3132. https://doi.org/10.3390/app11073132

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