TY JOUR TI Assurance of surface quality and productivity of machining at milling titanium alloys VT20 and VT22 KW milling KW cutting forces KW titanium alloys KW surface roughness JO Science intensive technologies in mechanical engineering AU Serebrennikova, A.G. AU Savilov, A.V. PY 2020 IS 2020 PB Bryansk State Technical University