TY JOUR TI Laser welding special features for butt-welded joints of aluminum alloy sheets in Al−Mg system KW alloys of the Al − Mg system KW laser welding KW radiation power KW welding speed KW porosity KW pore diameter KW hardness KW mechanical properties JO Science intensive technologies in mechanical engineering AU Ovchinnikov, V.V. AU Panas, P.A. PY 2026 IS 2026 PB Bryansk State Technical University