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Build-up strategies for laser metal deposition in additive manufacturing

 
: Petrat, Torsten; Graf, Benjamin; Gumenyuk, Andrey; Rethmeier, Michael

Müller, Bernhard ; Fraunhofer Additive Manufacturing Alliance, Dresden; Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik -IWU-, Chemnitz:
Fraunhofer Direct Digital Manufacturing Conference, DDMC 2018 : Berlin, March 14-15, 2018
Stuttgart: Fraunhofer Verlag, 2018
ISBN: 978-3-8396-1320-7
6 pp.
Fraunhofer Direct Digital Manufacturing Conference (DDMC) <2018, Berlin>
Bundesministerium für Bildung und Forschung BMBF
Wachstumskern Potenzial; 03WKP51B2; iLaP
Intelligente Laser- und Lichtbogensysteme mit integriertem Prozesswissen und intuitiver Bedienung
English
Conference Paper
Fraunhofer IPK ()

Abstract
Laser Metal Deposition (LMD) as a technology for additive manufacturing allows the production of large components outside of closed working chambers. Industrial applications require a stable process as well as a constant deposition of the filler material in order to ensure uniform volume growth and reproducible mechanical properties. This paper deals with the influence of travel path strategies on temperature profile and material deposition. Meandering and spiral hatching strategies are used in the center as well as in the edge of a specimen. The temperature is measured with thermocouples attatched to the backside of the specimen. The tests are carried out on the materials S235JR and 316L. The results show a strong dependence of the maximum temperatures on the travel path strategy and the welding position on the component.

: http://publica.fraunhofer.de/documents/N-506699.html