TY JOUR TI Impact assessment of ultrasonic vibrations on the stress state of the hole surface layer when treated by the calibration method KW calibration KW mandrel KW cylindrical hole KW traction force KW ultrasonic field energy KW stress state of the surface layer KW hole surface condition JO Science intensive technologies in mechanical engineering AU Lebedev, V.A. AU Torop, Y.A. AU Kochetov, A.N. AU Koval, N.S. PY 2023 IS 2023 PB Bryansk State Technical University