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Additive manufacturing and recycling by a laser-induced drop jet from a sheet edge
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development. Department of Mechanical Engineering, College of Engineering, University of Mosul, Mosul, 41002, Iraq.ORCID iD: 0000-0002-4569-8970
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2018 (English)In: Journal of laser applications, ISSN 1042-346X, E-ISSN 1938-1387, Vol. 30, no 4, article id 042010Article in journal (Refereed) Published
Abstract [en]

A new technique for additive manufacturing was recently presented by depositing droplets as a continuous track on a substrate, where the droplets were ejected from laser remote fusion cutting of a metal sheet. For the here presented approach, the droplets are instead ejected from the sheet edge, termed the machining mode, which is compared to cutting. Here, the transmitted part of the laser beam does not hit and interact with the deposited track because of lateral dislocation. High speed imaging has shown that laser-induced boiling, which drives the melt downwards, causes asymmetric conditions in the machining mode by lateral pushing of the generated drop jet under the sheet, where the melt can even attach. Compared to machining, the cutting mode keeps less deviation of the drop trajectories, higher precision, and a smoother surface finish. It was demonstrated that the edge conditions after machining are sufficient to repeat the process. This enables additional technique opportunities, including recycling of a whole sheet of waste metal. By the aid of high speed imaging from two different perspectives, the melt flow behavior, the drop jet precision, and process trends with respect to parameters, drop ejection, and deposition were studied.

Place, publisher, year, edition, pages
Melville (NY): American Institute of Physics (AIP), 2018. Vol. 30, no 4, article id 042010
Keywords [en]
additive manufacturing, melt drop ejection, laser-induced ablation, high speed imaging, metal recycling
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71870DOI: 10.2351/1.5026202ISI: 000451729800011Scopus ID: 2-s2.0-85057063428OAI: oai:DiVA.org:ltu-71870DiVA, id: diva2:1267613
Note

Validerad;2018;Nivå 2;2018-12-03 (inah)

Available from: 2018-12-03 Created: 2018-12-03 Last updated: 2019-09-13Bibliographically approved

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Samarjy, Ramiz S. M.Kaplan, Alexander

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