1. Department of Information Engineering, University of Padova , Padova, PD , Italia
2. Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho , Braga , Portugal
3. LaPMET - Laboratory of Physics for Materials and Emergent Technologies, University of Minho , Braga , Portugal
4. Mechanical Engineering Department, University of Las Palmas de Gran Canaria , Las Palmas de Gran Canaria , Spain
5. Transylvania University of Brasov, Materials Engineering and Welding Department , Brasov , Romania