1. Technical University of Košice, Faculty of Metallurgy, Department of Metals Forming, Letná 9, 042 00 Košice, Slovakia
2. Chalmers University of Technology, Department of Materials and Manufacturing Technology, Rannvagen 2, 412 96 Göteborg, Sweden
3. Consorzio Prometeo, Viale T. Michel 5, 15121 Alessandria, Italy
4. Politecnico di Torino, Department of Applied Science and Technology, Viale T. Michel 5, 15121 Alessandria, Italy