1. Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Greece
2. Research Center E. Piaggio and Department of Information Engineering, University of Pisa, 56126 Pisa, Italy
3. School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
4. School of Mechanical & Manufacturing Engineering, Dublin City University, D09 W6F4 Dublin, Ireland
5. Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy
6. Foundation for Research and Technology Hellas (FORTH)-IESL, 70013 Heraklion, Greece