TY JOUR TI STRUCTURE FORMATION IN SURFACE LAYERS OF GROUND PARTS IN FRICTION COUPLES DURING THEIR OPERATION KW surface wear resistance KW surface quality KW abrasive finishing KW structure formation of surface layer KW external friction JO Bulletin of Bryansk state technical university AU Suslov, A.G. AU Bishutin, S.G. AU Sakalo, V.. PY 2016 IS 2016 PB Bryansk State Technical University