Melt flow measurement inside the keyhole during laser welding
2011 (English)In: 13th NOLAMP Conference: 13th Conference on Laser Materials Proce Nordic Countries 27 - 29 June 2011 / [ed] Einar Halmøy, Trondheim: Department of Geography, Norwegian University of Science and Technology, 2011Conference paper (Refereed)
Laser keyhole welding has been in use for decades, but many of the complex mechanisms which take place within the keyhole remain poorly understood. Thispaper describes a streak image technique based on videos from high speed digital cameras. Itis similar to the technique used in goal cameras to visualize time-dependent events. Thecamera’s ability to acquire high speed image patterns with clear grayscale contrast hasenabled us to see the melt flow on the keyhole surface. In this paper the measured flowvelocity down the front of the keyhole is presented, showing a clear vertical downwardmotion on the keyhole front with speeds of the order of meters per second.
Place, publisher, year, edition, pages
Trondheim: Department of Geography, Norwegian University of Science and Technology, 2011.
Research subject Manufacturing Systems Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-31797Local ID: 615525ec-f847-47ac-b526-d3ddbb913554OAI: oai:DiVA.org:ltu-31797DiVA: diva2:1005031
Conference on Laser Materials Processing in the Nordic Countries : 27/06/2011 - 29/06/2011
Godkänd; 2011; 20110901 (ysko)2016-09-302016-09-30Bibliographically approved