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Imaging of the Dynamic Melt Movement Induced by a Pulsed Laser
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.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
Number of Authors: 2
2016 (English)In: Physics Procedia, ISSN 1875-3892, E-ISSN 1875-3892, Vol. 83, 1308-1318 p.Article in journal (Refereed) Published
Abstract [en]

A special case of an interrupted superheated process was developed, governed by the ablation pressure of a boiling melt, induced by a pulsed Nd:YAG-laser. A kind of cutting process was carried out, but at very low speed to generate a large melt pool that can be well studied. The interaction zone was observed by high speed imaging, with and without illumination. When switching the laser pulse on or off, different dynamic phenomena can be clearly observed, like drilling into a bulk of melt, breaking of a melt bridge, controlled pushing of the melt pool, waves running down, all driven by boiling. After the pulse, the melt smoothens and oscillates and is dragged back upwards by the surface tension forces from the melt shape curvature, ending in a torus-like equilibrium shape. The fundamental understanding that was generated could be applied to improve processes like keyhole laser welding, laser remote fusion cutting or laser drilling

Place, publisher, year, edition, pages
2016. Vol. 83, 1308-1318 p.
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-59730DOI: 10.1016/j.phpro.2016.08.138ISI: 000387459400142Scopus ID: 2-s2.0-84993978529OAI: oai:DiVA.org:ltu-59730DiVA: diva2:1035966
Conference
9th International Conference on Photonic Technologies Proceedings of the LANE 2016 September 19-22, 2016 Fürth, Germany
Note

Konferensartikel i tidskrift

Available from: 2016-10-13 Created: 2016-10-13 Last updated: 2017-09-14Bibliographically approved

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CiteExportLink to record
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