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Investigation of process improvements through laser preheating in extrusion-based additive manufacturing process

  • Fused layer modeling (FLM) is widely used and is gaining more acceptance in the industry mainly due to its material variety and low costs. However, the usage is limited by a process-related anisotropy of the produced parts. The strength and ductility of the printed parts are significantly lower in the build-up direction than perpendicular to it. This is caused by insufficient interlayer bonding resulting from a reduced surface temperature in the process zone. To overcome this problem, a diode laser is integrated into the conventional FLM process to increase the surface temperature between the already printed surface and the newly applied substrate directly at the deposition zone. The investigations carried out show a significant improvement in the mesostructure, as well as a clear reduction in the anisotropy of the printed test specimens.

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Metadaten
Author:Dennis Meisner, Lukas Forstner, Nikitas Kaftiranis, Stefan HierlGND
URL / DOI:https://www.wlt.de/sites/default/files/2023-09/Contribution_140.pdf
Parent Title (English):Lasers in Manufacturing Conference (LIM 2023), 26. Juni bis 29. Juni 2023, München
Publisher:Wissenschaftliche Gesellschaft Lasertechnik und Photonik e.V. (WLT)
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2023
Release Date:2023/10/13
Tag:anisotropy; fused layer modeling; interlayer bonding; laser preheating; mesostructure
Pagenumber:10
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Labor Laser-Materialbearbeitung (LMP)
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG