Local curvature changes of the melt pool surface and their connection to the formation of undercuts in laser welding

Robert Steinhoff, Johannes Michel, Michael Sawannia, Marko Jurukovic, Tobias Ehnis, Christian Hagenlocher, Thomas Graf

Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, Germany

Effects of Spatial Energy Deposition on Weld Seam Geometry and Melt Pool Dynamics in Parallel Dual-Beam Laser Welding

Christoph Spurk¹, Nivetha Muthuvijaypandian², Tobias Florian², Nils Bena¹, Tobias Berger^3,4, Zubin Babajan¹, Martin Traub⁴, André Häusler⁴, Alexander Olowinsky⁴, Andreas Otto², Arnold Gillner¹

¹RWTH Aachen University, Chair for Laser Technology LLT, Steinbachstraße 15, 52074 Aachen; ²TU Wien, Institute of Production Engineering and Photonic Technologies, Getreidemarkt 9, 1060 Vienna,; ³FH Aachen – University of Applied Sciences, Bayernalle 11, 52066 Aachen, Germany; ⁴Fraunhofer Institute for Laser Technology ILT, Steinbachstraße 15, 52074 Aachen, Germany

Influence of Inter-Beam Distance on Keyhole Depth Instability and Weld Seam Coupling in Dual-Beam Welding of CuSn6 Alloy

Nivetha Muthuvijayapandian¹, Christoph Spurk², Tobias Florian¹, Constantin Zenz¹, Marc Hummel^2,3, Alexander Olowinsky³, Felix Beckmann⁴, Julian Moosmann⁴, Andreas Otto¹

¹TU Wien, Institute of Production Engineering and Photonic Technologies, Getreidemarkt 9, 1060 Vienna, Austria.; ²RWTH Aachen University, Chair for Laser Technology LLT, Steinbachstraße 15, 52074 Aachen, Germany.; ³Fraunhofer Institute for Laser Technology ILT, Steinbachstraße 15, 52074 Aachen, Germany; ⁴Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany

Acoustic emission-based monitoring of oil contamination during laser beam welding

Fan Yang¹, Cemil Emre Ardic^3,2, Kodera Sayako³, Teffi Saravanapavan³, Leander Schmidt¹, Florian Römer^2,3, Jean Pierre Bergmann¹

¹Production Technology Group, Technische Universität Ilmenau, Gustav-Kirchhoff-Platz 2,98693 Ilmenau, Germany; ²Technische Universität Ilmenau, Signal Processing for Intelligent Sensor Systems Group, 98693 Ilmenau; ³Fraunhofer Institute for Nondestructive Testing IZFP, Campus E3 1, 66123 Saarbrücken, Germany

Targeted Use of an Intensity Maximum in Laser Beam Welding to Increase Weld Depth with Reduced Spatter Formation

Marcel Möbus^1,2, Ronald Pordzik¹, Thomas Seefeld¹, Peer Woizeschke²

¹BIAS - Bremer Institut für angewandte Strahltechnik, Bremen, Germany; ²LMP+ research group, TU Dortmund University, Germany