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Analysis of Melt Pool Characteristics and Process Parameters Using a Coaxial Monitoring System during Directed Energy Deposition in Additive Manufacturing
Development Department, Sauer GmbH LASERTEC, DMG MORI AG, Pfronten, Germany.
Development Department, Sauer GmbH LASERTEC, DMG MORI AG, Pfronten, Germany.
Development Department, Sauer GmbH LASERTEC, DMG MORI AG, Pfronten, Germany.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. Additive Manufacturing and Printing, Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany.
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2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 2, article id 308Article in journal (Refereed) Published
Abstract [en]

The growing number of commercially available machines for laser deposition welding show the growing acceptance and importance of this technology for industrial applications. Their increasing usage in research and production requires process stability and user-friendly handling. A commercially available DMG MORI LT 65 3D hybrid machine used in combination with a CCD-based coaxial temperature measurement system was utilized in this work to investigate what information relating to the intensity distribution of melt pool surfaces could be appropriate to draw conclusions about process conditions. In this study it is shown how the minimal required specific energy for a stable process can be determined, and it is indicated that the evolution of a plasma plume depends on thermal energy within the base material. An estimated melt pool area—calculated by the number of pixels (NOP) with intensities larger than a fixed, predefined threshold—builds the main measure in analysing images from the process camera. The melt pool area and its temporal variance can also serve as an indicator for an increased working distance

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 12, no 2, article id 308
Keywords [en]
directed energy deposition, laser metal deposition, laser cladding, process parameters, melt pool, coaxial monitoring, process monitoring
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73065DOI: 10.3390/ma12020308ISI: 000459719000112PubMedID: 30669432Scopus ID: 2-s2.0-85060179711OAI: oai:DiVA.org:ltu-73065DiVA, id: diva2:1292421
Note

Validerad;2019;Nivå 2;2019-02-28 (johcin)

Available from: 2019-02-28 Created: 2019-02-28 Last updated: 2019-04-12Bibliographically approved

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Brueckner, Frank

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