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A Round Robin study for selective laser sintering of polymers: Back tracing of the pore morphology to the process parameters

  • The mechanical properties of polymer parts built by Selective Laser Sintering are strongly related to the internal microstructure which differs with the applied production parameters. The paper focuses on the back tracing of the pore morphology of laser sintered polyamide-12 samples to the process parameters. Therefore, a data base is used which is supplied by a Round Robin initiative and includes mechanical tensile tests and the microstructural analysis of the pore morphology of several different sample charges built with different machines. The pore morphologies (porosity, pore density, pore shape and pore arrangement) measured by X-ray computed tomography are compared and discussed regarding the employed parameters and the resulting mechanical properties. The investigations point out that pore density is a superior indicator than porosity for mechanical issues. This is especially valid along the build direction since pore morphology has shown to be strongly anisotropic. Moreover, the analysis revealed that pore density is strongly affected by the process temperature, which is proved to be essential for the fabrication of mechanical robust parts using Selective Laser Sintering.

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Metadaten
Author:Thomas Stichel, Thomas Frick, Tobias LaumerORCiDGND, Felix Tenner, Tino HausotteORCiDGND, Marion MerkleinORCiDGND, Michael Schmidt
DOI:https://doi.org/10.1016/j.jmatprotec.2017.10.013
Parent Title (English):Journal of Materials Processing Technology
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2018
Release Date:2022/06/07
Volume:252
Issue:February
First Page:537
Last Page:545
Institutes:Fakultät Maschinenbau
Technologie-Campus Parsberg-Lupburg
Fakultät Maschinenbau / Labor Maschinendynamik und Strukturanalyse (LMS)
Fakultät Maschinenbau / Labor Additive and Intelligent Manufacturing for Sustainability (AIMS)
Begutachtungsstatus:peer-reviewed
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG