TY JOUR TI EFFECT OF MODES ON FRICTION COEFFICIENT IN THE CUTTING AREA WHEN TURNING TN1 ALLOY KW TN1 alloy KW turning KW workpiece KW cutter KW friction coefficient JO Transport engineering AU Tselikov, P.V. AU Gubin, D.S. AU Kisel', A.G. PY 2025 IS 2025 PB Bryansk State Technical University