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Analysis of the Influence of Different Flowability on Part Characteristics Regarding the Simultaneous Laser Beam Melting of Polymers

  • Powder based Additive Manufacturing technologies offer huge potential for building parts with almost no geometrical restrictions, but both the process controlling as well as the part properties are strongly dependent on different material characteristics of the material, like the flowability. In this work, different weight percentages of nano-scaled silica dioxide particles (Aerosil®) are admixed to pure polyethylene and polypropylene powder and the resulting flowability is determined. Besides using the Hausner ratio as standardized value, the degree of coverage is introduced as a new characteristic to quantify the powder flowability. The degrees of coverage are compared to the Hausner ratios to allow a discussion and evaluation about the different characteristic values. Additionally, tensile bars consisting of polypropylene are generated to determine the porosity by cross sections and the mechanical part properties by tensile testing. As mechanical part properties, the tensile strength and elongation at break are determined and the effects of different powder flowability on these properties are analyzed.

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Metadaten
Author:Tobias LaumerORCiDGND, Thomas Stichel, Max Raths, Michael Schmidt
DOI:https://doi.org/10.1016/j.phpro.2016.08.098
ISSN:1875-3892
ISSN:1875-3884
Parent Title (English):Physics Procedia
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2016
Release Date:2022/11/24
Tag:additive manufacturing; laser beam melting of polymers; material qualification
Volume:83
First Page:937
Last Page:946
Konferenzangabe:9th International Conference on Photonic Technologies - LANE 2016
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Labor Additive and Intelligent Manufacturing for Sustainability (AIMS)
Begutachtungsstatus:peer-reviewed
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International