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Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.Kaplan, Alexander Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.Powell, John Luleå University of Technology, Department of Engineering Sciences and Mathematics. 2013 (English)In: Optics and lasers in engineering, ISSN 0143-8166, E-ISSN 1873-0302, Vol. 51, no 6, 735-740 p.Article in journal (Refereed) Published

Abstract [en] : The flow of molten metal on the front wall of a laser generated welding keyhole has been observed by high speed photography, optically measured by mapping the flow of ripples on the liquid surface and theoretically calculated. A clear downward flow can be observed and measured by a Particle Image Velocimetry algorithm. A theoretical calculation of the melt thickness on the keyhole front is also presented. Results indicate that the thickness of the liquid on the keyhole front is similar to that of the resolidified layer found in micrographs of the front if the laser is suddenly turned off. The measured surface ripple flow speeds are between two and four times as high as the theoretical average fluid flow rate.

Place, publisher, year, edition, pages: 2013. Vol. 51, no 6, 735-740 p.

National Category : Manufacturing, Surface and Joining Technology

Research subject: Manufacturing Systems Engineering

Identifiers: URN: urn:nbn:se:ltu:diva-4447DOI: 10.1016/j.optlaseng.2013.01.008Local ID: 263f5b3e-0da3-4c03-a6ac-0d580ad2acbfOAI: oai:DiVA.org:ltu-4447DiVA: diva2:977320

Note: Validerad; 2013; 20130211 (andbra)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved



Autor: Eriksson, Ingemar

Fuente: http://ltu.diva-portal.org/







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