Hesse N, Winzer B, Peukert W, Schmidt J (2021)
Publication Type: Journal article
Publication year: 2021
Pages Range: 101957
Article Number: 101957
DOI: 10.1016/j.addma.2021.101957
The majority of additively manufactured plastic parts built with powder bed fusion (PBF) processes are made of polyamide 12. Since only a fraction of powder ends up in the components built, part cake material and overflow powder has to be re-used for economic and ecologic reasons, even though its material properties are altered by thermo-mechanical stress during processing. Changes in bulk solid properties play a key role for the stability of the PBF process and the quality of manufactured parts. However, there is still no generally accepted method for the evaluation of used powders with respect to their processability and a lack of understanding of underlying bulk material mechanics. The aim of this study, exemplified for polyamide 12, is to assess widely applicable, standardized and process-adapted characterization methods in additive manufacturing and to shed light on the underlying phenomena causing the changes in flowability and packing properties of used powders.
APA:
Hesse, N., Winzer, B., Peukert, W., & Schmidt, J. (2021). Towards a generally applicable methodology for the characterization of particle properties relevant to processing in powder bed fusion of polymers – from single particle to bulk solid behavior. Additive Manufacturing, 101957. https://dx.doi.org/10.1016/j.addma.2021.101957
MLA:
Hesse, Nicolas, et al. "Towards a generally applicable methodology for the characterization of particle properties relevant to processing in powder bed fusion of polymers – from single particle to bulk solid behavior." Additive Manufacturing (2021): 101957.
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