Fundamentals of melt flow dynamics and spatter formation during laser welding in different regimes of high-alloy steels

Christian Diegel¹, Leander Schmidt¹, Klaus Schricker^1,2, Marc Seibold¹, Felix Zaiß³, Christian Hagenlocher³, Christoph Spurk⁴, Marc Hummel⁵, Alexander Olowinsky⁵, Felix Beckmann⁶, Julian Moosmann⁶, Thomas Graf³, Jean Pierre Bergmann¹

¹Technische Universität Ilmenau, Production Technology Group, Gustav-Kirchhoff-Platz 2, 98693 Ilmenau, Germany; ²Brandenburg University of Technology Cottbus-Senftenberg, Chair of Joining and Welding Technology, Konrad-Wachsmann-Allee 13, 03046 Cottbus; ³Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart , Germany; ⁴RWTH Aachen University, Chair for Laser Technology LLT, Steinbachstraße 15, 52074 Aachen, Germany; ⁵Fraunhofer Institute for Laser Technology ILT, Steinbachstraße 15, 52074 Aachen, Germany; ⁶Institute of Material Physics, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthacht, Germany

Synchrotron X-ray imaging of the formation of transverse hot cracks during laser welding of a high-strength aluminum alloy and their dependence on local solidification conditions and process parameters

Johannes Michel¹, Michael Haas^1,2, Robert Steinhoff¹, Michael Sawannia¹, Christoph Spurk³, Marc Hummel^3,4, Alexander Olowinsky⁴, Felix Beckmann⁵, Julian Moosmann⁵, Christian Hagenlocher¹, Thomas Graf¹

¹Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, Germany; ²Graduate School of Excellence advanced Manufacturing Engineering (GSaME), University of Stuttgart, Nobelstr. 12, 70569 Stuttgart, Germany; ³RWTH Aachen University, Chair for Laser Technology LLT, Steinbachstraße 15, 52074 Aachen, Germany; ⁴Fraunhofer-Institute for Laser Technology ILT, Steinbachstraße 15, 52074 Aachen, Germany; ⁵Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany

Numerical simulation and synchrotron X-ray diffraction study of temporal strain development leading to hot cracking in pulsed laser beam welding

Joseph Bophelo Morake¹, Andreas Herrmann¹, Leander Schmidt¹, Klaus Schricker^1,2, Marc Seibold¹, Chen Yunhui³, Hannes Friedmann¹, Christian Diegel¹, Fabian Fröhlich¹, Stephan Eichler¹, Alexander Rack⁴, Veijo Honkimäki⁴, Jean Pierre Bergmann¹

¹Ilmenau University of Technology, Production Technology Group, Gustav-Kirchhoff-Platz 2, 98693 Ilmenau, Germany; ²Brandenburg University of Technology Cottbus-Senftenberg, Chair of Joining and Welding Technology, Konrad-Wachsmann-Allee 13, 03046 Cottbus, Germany; ³RMIT Center for Additive Manufacturing, RMIT University, Melbourne, 3000, Australia; ⁴European Synchrotron Radiation Facility – The European Synchrotron, 71, avenue des Martyrs, 38043 Grenoble, France

Impact of the vapor plume on fluctuations of capillary shape and depth during deep-penetration laser welding of stainless steel

Johannes Wahl¹, Michael Haas^1,3, John Powell¹, Christian Frey², Marc Hummel^4,5, Christoph Spurk⁵, Alexander Olowinsky⁴, Felix Beckmann⁶, Julian Moosmann⁶, Simon Olschok², Uwe Reisgen², Christian Hagenlocher¹, Thomas Graf¹

¹Institut für Strahlwerkzeuge (IFSW), University of Stuttgart, Germany; ²RWTH Aachen University, Welding and Joining Institute (ISF); ³Graduate School of Excellence advanced Manufacturing Engineering, University of Stuttgart; ⁴Fraunhofer Institute for Laser Technology ILT; ⁵RWTH Aachen University, Chair for Laser Technology LLT; ⁶Institute of Materials Physics, Helmholtz-Zentrum Hereon