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New high-speed photography technique for observation of fluid flow in laser welding
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
2010 (English)In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 49, no 10Article in journal (Refereed) Published
Abstract [en]

Recent developments in digital high-speed photography allow us to directly observe the surface topology and flow conditions of the melt surface inside a laser evaporated capillary. Such capillaries (known as keyholes) are a central feature of deep penetration laser welding. For the first time, it can be confirmed that the liquid capillary surface has a rippled, complex topology, indicative of subsurface turbulent flow. Manipulation of the raw data also provides quantitative measurements of the vertical fluid flow from the top to the bottom of the keyhole.

Place, publisher, year, edition, pages
2010. Vol. 49, no 10
National Category
Manufacturing, Surface and Joining Technology Applied Mechanics
Research subject
Manufacturing Systems Engineering; Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-8108DOI: 10.1117/1.3502567Local ID: 68f90290-e661-11df-8b36-000ea68e967bOAI: oai:DiVA.org:ltu-8108DiVA: diva2:980999
Note
Validerad; 2010; Bibliografisk uppgift: Paper id:: 100503; 20101102 (ingeri)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Eriksson, IngemarGren, PerPowell, JohnKaplan, Alexander
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