Control of geometry and metallurgy in laser beam micro¬welding by influencing the melt pool dynamics by spatial and temporal adapted energy input (A01)

• Subject Area: Joining and Separation Technology
• Term: since 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 236616214

In the third phase of subproject A01, the focus is on the compensation of irregularities and the control of the absorption of laser radiation in the keyhole during laser welding to avoid pore formation, surface roughness and non-uniform welding depths. For this purpose, a combination of spatial and temporal power modulation using a multi-beam approach as well as wavelength modulation is used to avoid process errors and ensure high process reproducibility. To evaluate the compensation approaches, the X-ray transmission experiments started in phase 2 of the SFB will be continued at the German Electron Synchrotron.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1120: Precision manufacturing by controlling melt dynamics and solidification in production processes
• Applicant Institution: Rheinisch-Westfälische Technische Hochschule Aachen
• Project Head: Professor Dr.-Ing. Arnold Gillner