TY JOUR TI ELECTROSPARK COATING PROCESSING WITH METHOD OF ULTRASONIC PLASTIC DEFORMATION KW electrospark alloying KW processing KW deformation KW intermetallic alloy KW roughness KW surface KW ion etching KW crystal grains JO Bulletin of Bryansk state technical university AU Himuhin, S.N. AU Eremina, K.P. AU Dzyuba, G.S. PY 2020 IS 2020 PB Bryansk State Technical University