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Optical Engineering • Open Access

New high-speed photography technique for observation of fluid flow in laser welding
Author(s): Ingemar Eriksson; Per Gren; John Powell; Alexander F. H. Kaplan

Paper Abstract

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.

Paper Details

Date Published: 1 October 2010
PDF: 3 pages
Opt. Eng. 49(10) 100503 doi: 10.1117/1.3502567
Published in: Optical Engineering Volume 49, Issue 10
Show Author Affiliations
Ingemar Eriksson, Luleå Univ. of Technology (Sweden)
Per Gren, Luleå Univ. of Technology (Sweden)
John Powell, Luleå Univ. of Technology (Sweden)
Alexander F. H. Kaplan, Luleå Univ. of Technology (Sweden)

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