1. The Aleksander Krupkowski Institute of Metallurgy and Materials Science Polish Academy of Sciences 25 Reymonta St. 30-059 Kraków Poland
2. The Faculty of Materials Science and Engineering Warsaw University of Technology 141 Wołoska St. 02-507 Warsaw Poland
3. Institute of Non Ferrous Metals 5 Sowinskiego Str. Gliwice 44-100 Poland
4. Institute of Materials Physics Helmholtz-Zentrum Geesthacht Max-Planck-Strasse 1 D-21502 Geesthacht Germany