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Characterization of recycled AISI 904L superaustenitic steel powder and influence on selective laser melted parts

Title data

Hilzenthaler, Marius ; Bifano, Luca ; Scherm, Florian ; Fischerauer, Gerhard ; Seemann, Andrea ; Glatzel, Uwe:
Characterization of recycled AISI 904L superaustenitic steel powder and influence on selective laser melted parts.
In: Powder Technology. Vol. 391 (October 2021) . - pp. 57-68.
ISSN 0032-5910
DOI: https://doi.org/10.1016/j.powtec.2021.06.011

Abstract in another language

In laser powder-bed fusion processes, excessive metal powder is affected by high laser energy input and contains spatter from the melt pool. Recycled powder therefore can have a negative impact on process quality. In this study, AISI 904L stainless steel powder is recycled up to ten times. The powder is analyzed using scanning electron microscopy and by measuring chemical composition, flowability and particle size distribution in order to examine changes in properties due to recycling. Furthermore, electrical impedance spectroscopy was introduced as a potential method to determine surface oxides on powder particles due to handling and recycling. The recycled powder shows a significant increase in flowability. Furthermore no significant changes of powder properties such as chemical composition and particle size distribution can be found after ten recycling steps, resulting in comparable density and mechanical properties of printed parts. Therefore the present powder material shows an excellent recyclability.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Additive manufacturing; selective laser melting; metal powder recycling; stainless steel
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Metals and Alloys
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Faculties
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Aug 2021 05:34
Last Modified: 21 Oct 2021 07:38
URI: https://eref.uni-bayreuth.de/id/eprint/66725