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Powder catchment in laser metal deposition
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-7213-0002
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. Fraunhofer IWS, Winterbergstrasse 28, Dresden, Germany.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2019 (English)In: Journal of laser applications, ISSN 1042-346X, E-ISSN 1938-1387, Vol. 31, no 2, article id 022308Article in journal (Refereed) Published
Abstract [en]

Laser metal deposition (LMD) of Inconel 718 using a coaxial nozzle is investigated by high-speed imaging. The interaction of individualpowder grains with the laser induced melt pool surface and, finally, their catchment in the LMD track is observed. Powder catchment trendsare explained by interpreting physical phenomena, such as the melt flow and surface tension. Distinct zones for powder catchment are categorizeddepending on the position of initial interaction between powder grains and the melt pool. Particles are introduced outside the meltpool ricochet and do not attach to the clad. Particles arriving outside the laser spot, onto the solidifying skin of the melt pool, are caught,and may incorporate. Some particles may remain on the clad surface as surface roughness on the built part. Particles interacting with thelaser-irradiated region of the melt pool tend to move toward its center and readily incorporate into the melt. Quantitative analyses of highspeedvideos are carried out to measure incorporation time of powder grains in the melt pool, their velocity, and distance traveled.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2019. Vol. 31, no 2, article id 022308
Keywords [en]
laser metal deposition, additive manufacturing, high-speed imaging, powder catchment mechanisms, blown powder, laser cladding
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73750DOI: 10.2351/1.5096130Scopus ID: 2-s2.0-85064609365OAI: oai:DiVA.org:ltu-73750DiVA, id: diva2:1306746
Conference
37th International Congress of Applications of Lasers & Electro-Optics (ICALEO 2018). 14-18 October 2018, Orlando, Florida
Note

Konferensartikel i tidskrift

Available from: 2019-04-24 Created: 2019-04-24 Last updated: 2019-05-15Bibliographically approved
In thesis
1. Phenomena in material addition to laser generated melt pools
Open this publication in new window or tab >>Phenomena in material addition to laser generated melt pools
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keywords
laser metal deposition, additive manufacturing, laser welding, multi-material, high speed imaging, powder incorporation, off-axis wire feed, streak imaging, laser cladding, absorptivity
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-73754 (URN)978-91-7790-378-9 (ISBN)978-91-7790-379-6 (ISBN)
Presentation
2019-06-20, E632, lulea tekniska universitet, Lulea, 09:00 (English)
Opponent
Supervisors
Available from: 2019-04-25 Created: 2019-04-24 Last updated: 2019-06-05Bibliographically approved

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Brueckner, FrankKaplan, Alexander

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