Influence of an external applied AC magnetic field on the melt pool dynamics at high-power laser beam welding
Open Access
- 1 November 2021
- journal article
- Published by IOP Publishing in IOP Conference Series: Materials Science and Engineering
- Vol. 1135 (1)
- https://doi.org/10.1088/1757-899x/1135/1/012017
Abstract
The study deals with the determination of the influence of an externally applied oscillating magnetic field on the melt pool dynamics in high power laser beam and hybrid laser arc welding processes. An AC magnet was positioned under the workpiece which is generating an upward directed electromagnetic force to counteract the formation of the droplets. To visualise the melt flow characteristics, several experiments were carried out using a special technique with mild steel from S355J2 with a plate thickness of up to 20 mm and a quartz glass in butt configuration. The profile of the keyhole and the melt flow were recorded with a highspeed camera from the glass side. Additionally, the influence of the magnetic field orientation to the welding direction on the filler material dilution on laser hybrid welding was studied with variating oscillation frequency. The element distribution over the whole seam thickness was measured with X-ray fluorescence (XRF). The oscillation frequency demonstrated a great influence on the melt pool dynamics and the mixing of the elements of the filler wire. The highspeed recordings showed, under the influence of the magnetic field, that the melt is affected under strong vortex at the weld root, which also avoids the formation of droplets.This publication has 17 references indexed in Scilit:
- Single pass hybrid laser-arc welding of 25 mm thick square groove butt jointsMaterials & Design, 2016
- Laser Submerged Arc Welding (LUPuS) with Solid State LasersPhysics Procedia, 2014
- Hybrid laser arc welding of X80 and X120 steel gradeScience and Technology of Welding and Joining, 2014
- PA position full penetration high power laser beam welding of up to 30 mm thick AlMg3 plates using electromagnetic weld pool supportScience and Technology of Welding and Joining, 2012
- Development of Deep Penetration Welding Technology with High Brightness Laser under VacuumPhysics Procedia, 2011
- Effect of electromagnetic Stirring on the Element Distribution in Laser Beam Welding of Aluminium with Filler WirePhysics Procedia, 2011
- Influence on the dilution by laser welding of aluminum with magnetic stirringPhysics Procedia, 2010
- Influence of welding parameters on distribution of wire feeding elements in CO2 laser GMA hybrid weldingScience and Technology of Welding and Joining, 2009
- Laser-Hybrid Welding of Thick Plates up to 32 mm Using a 20 kW Fibre LaserQUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 2009
- Magnetic stirring during laser welding of aluminumJournal of Laser Applications, 2006