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A. Sitko
Gdańsk University of Technology, Faculty of Mechanical Engineering, Department of Materials Technology and Welding, 11/12 Narutowicza, 80-233 Gdańsk, Poland
M. Szkodo
Gdańsk University of Technology, Faculty of Mechanical Engineering, Department of Materials Technology and Welding, 11/12 Narutowicza, 80-233 Gdańsk, Poland
S. Kucharski
Institute of Fundamental Technological Research of the Polish Academy of Sciences, Department of Mechanics of Materials, Pawińskiego 5B, 02-106 Warsaw, Poland