1. Tampere University of Technology, Laboratory of Materials Science; PO Box 527 33101 TAMPERE FINLAND
2. Fraunhofer Institut für Werkstoff- und Strahltechnik IWS, Material and Beam Technology; Winterbergstraße 28 01277 DRESDEN GERMANY
3. Centria University of Applied Sciences; Talonpojankatu 2 67100 KOKKOLA FINLAND