TY JOUR TI Contemporary Welding Processes and Their Efficiency in the Manufacturing of High-Speed Railway Car Bodies KW HST body manufacturing KW car body material KW welding technology KW welding automation KW use of welding robots KW welded joint defect KW analysis of deformation and stress in the joint JO Bulletin of scientific research results AU Kononov, D.P. AU Budyukin, A.M. AU Kondratyenko, V.G. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"