1. Institute for Metals Superplasticity Problems; Russian Academy of Sciences, 39 Khalturin St.; Ufa 450001 Russia
2. Bashkir State University; 32 Zaki Validi St.; Ufa 450074 Russia
3. School of Mechanical and Aerospace Engineering; Nanyang Technological University, 50 Nanyang Avenue; Singapore 639798 Singapore
4. State University; Lenin Prospekt 36; Tomsk 634050 Russia