Novel X-ray System for in-situ Diagnostics of Laser Based Processes – First Experimental Results

3D transient multiphase model for keyhole, vapor plume, and weld pool dynamics in laser welding including the ambient pressure effect

“…It can be learned that the keyhole profile is highly unstable and many irregular humps can be found on the wall. These phenomena agree well with the previous imaging results of the keyhole, such as Matsunawa et al [28], Katayama et al [29,30], Abt et al [31] and Kaplan et al [32]. Moreover, the average temperature of the keyhole wall is very high, approximately 2900 K, that is also in line with the long believed [36]) in the weld pool.…”

High-Speed X-Ray Investigation of Pore Formation during Full Penetration Laser Beam Welding of AA6016 Aluminum Sheets Contaminated with Lubricants

“…The process of pore formation was analyzed by means of an X-ray system for in-situ diagnostics during laser beam welding, as presented in [20,21].…”

High Power, High Speed, High Quality

“…The main activities at the IFSW are currently concerned with selected topics in the fields of laser beam sources (especially the thin-disk laser), optical elements and components for beam delivery and beam shaping as well as fundamental investigations on the light-matter interaction with the subsequent process development of macro and micro applications for industrial manufacturing. For a comprehensive analysis, highspeed X-ray videos of the welding processes were recorded at the IFSW X-ray facility with a frame rate of 2 kHz and a spatial resolution of about 100 µm [4]. The aim was to determine the influence of the feed rate on the geometry and the dynamics of the capillary and to correlate the shape and the fluctuations of the capillary with the resultant seam quality.…”