1. University POLITEHNICA of Bucharest; Metallic Material Science, Physical Metallurgy Department; 313, Independenţei Blvd. Bucharest 060042 Romania
2. Washington State University; School of Mechanical and Materials Engineering; Pullman WA United States
3. University Politehnica from Bucharest; Faculty of Applied Chemistry and Materials Sciences; 1-7 Gheorghe Polizu Bucharest 011061 Romania