TY JOUR TI STUDY IN FRICTION MICROHARDNESS AUSTENITIC CHUGUNOV KW valve seats KW friction KW microhardness KW austenitic cast iron JO Alternative energy sources in the transport-technological complex: problems and prospects of rational use of AU Popov, D.. AU Tretyakov, A.I. PY 2014 IS 1 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov