TY JOUR TI Technological quality support of weld seam obtained by friction stir method KW friction stir welding KW aluminum alloys KW welding modes KW mechanism of joint formation KW heating temperature KW joint defect JO Science intensive technologies in mechanical engineering AU Ovchinnikov, V.V. AU Opalnitskiy, A.Y. AU Drits, A.M. PY 2019 IS 2019 PB Bryansk State Technical University