1. Ufa State Petroleum Technological University Kosmonavtov Str. 1 Ufa 450062 Russia
2. Institute for Metals Superplasticity Problems of the Russian Academy of Sciences Khalturina 39 Ufa 450001 Russia
3. Bashkir State University Zaki Validi 32 Ufa 450067 Russia
4. Peter the Great St.Petersburg Polytechnic University Polytechnicheskaya, 29 St.Petersburg 195251 Russia