1. Department of Welding Engineering, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland
2. Department of Welding Engineering, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland (Corresponding author), e-mail: jacek.gorka@polsl.pl, https://orcid.org/0000-0001-7838-3636
3. Institute of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland