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Development of an ultrasonically excited recoating process in laser powder bed fusion to process non-spreadable 316L powder

Drechsel, Kai 1; Lubkowitz, Victor 1; Albrecht, Lena 2; Schäfer, Paul 2; Schneider, Markus; Schulze, Volker 1; Zanger, Frederik ORCID iD icon 1
1 Institut für Produktionstechnik (WBK), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Part quality in laser powder bed fusion is influenced by the uniformity and density of the powder layer. As a result, requirements for the powder regarding spreadability and flowability are restrictive. Many researchers reported recoating defects for cohesive and agglomerating powders. However, the processing of such powders is highly desirable since e.g. surface roughness can be reduced. Therefore, we propose a novel ultrasonically excited recoater system to process such powder. In order to qualify the new recoater system, five different geometries with various amplitudes and recoating velocities were evaluated and compared to a conventional system. The defect rate, determined with a camera and AI-based analysis, the deposited mass and segregation along the recoated distance and the powder layer density of the resulting powder bed were analyzed. A process window and optimal geometry could be identified. It was possible to reduce segregation to a minimum, while maintaining a smooth, dense layer.


Verlagsausgabe §
DOI: 10.5445/IR/1000164774
Veröffentlicht am 23.11.2023
Originalveröffentlichung
DOI: 10.1016/j.powtec.2023.119153
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Produktionstechnik (WBK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2024
Sprache Englisch
Identifikator ISSN: 0032-5910, 1873-328X
KITopen-ID: 1000164774
Erschienen in Powder Technology
Verlag Elsevier
Band 432
Seiten 119-153
Vorab online veröffentlicht am 14.11.2023
Nachgewiesen in Dimensions
Scopus
Web of Science
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