1. Institute of Joining and Welding, Technische Universität Braunschweig, Germany Langer Kamp 8, Braunschweig 38106, Germany (Corresponding author), e-mail: j.hensel@tu-braunschweig.de, https://orcid.org/0000-0002-1843-6473
2. Institute of Joining and Welding, Technische Universität Braunschweig, Germany Langer Kamp 8, Braunschweig 38106, Germany