TY JOUR TI MACHINING THE ENDS OF PART WORKPIECES KW turning KW ends KW workpieces KW parts KW coatings KW VK8 alloy KW comparison KW periods KW durability KW tool JO Transport engineering AU Mokrickiy, B.Y. AU Grigoriev, V.V. AU Skripilyov, A.A. AU Maryin, S.B. PY 2024 IS 2024 PB Bryansk State Technical University