1. Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
2. Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, 831 02 Bratislava, Slovakia
3. Institute of Materials Science, Faculty of Material Sciences and Technology in Trnava, Slovak University of Technology in Bratislava, Slovakia
4. National Taiwan University of Science and Technology, Department of Mechanical Engineering, 43, Sec. 4, Keelung Rd., 106 Taipei, Taiwan, R.O.C.
5. Department of Materials Science, Faculty of Metallurgy, Technical University in Košice, Park Komenského 11, 042 00 Košice, Slovakia