1 Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, 44227, Dortmund, Germany. Electronic address: nils.wegner@tu-dortmund.de.
2 Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, 44227, Dortmund, Germany.
3 Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, 44227, Dortmund, Germany. Electronic address: frank.walther@tu-dortmund.de.