1. Department of Systems Engineering; Department of Materials Science and Engineering, Intelligent Material Systems Lab; Saarland University; Gewerbepark Eschberger Weg 46, Geb. 9 66121 Saarbrücken Germany
2. Department of Systems Engineering, Lab for Measurement Technology; Saarland University; Gewerbepark Eschberger Weg 46, Geb. 9 66121 Saarbrücken Germany
3. Institute for Materials; Chair for Materials Science and Engineering; Ruhr-Universität Bochum; Universitätsstr. 150 44780 Bochum Germany