1. Sumy State University, R. Korsakov 2, 40007 Sumy, Ukraine
2. Belgorod State University, Belgorod, Russia
3. Paton Welding Institute NAS of Ukraine, Kiev, Ukraine
4. National Kharkov University, Kharkov, Ukraine
5. National Institute for Material Science, Tsukuba, Japan
6. Lublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland