1. INEGI Campus da FEUP, Rua Dr. Roberto Frias, 400 4200‐465 Porto Portugal
2. LAETA, IDMEC, Instituto Superior TécnicoUniversidade de Lisboa Av. Rovisco Pais 1049‐001 Lisbon Portugal
3. Institute of Materials Research, Materials Mechanics, Solid State Joining ProcessesHelmholtz‐Zentrum Geesthacht Max‐Planck Str. 1 21502 Geesthacht Germany
4. FEUPUniversity of Porto Rua Dr. Roberto Frias, s/n 4200‐465 Porto Portugal