TY CONF TI REDUCING THE THERMAL STRESS OF THE EXHAUST VALVES OF RECIPROCATING ENGINES BY CONTROLLING THE CONTACT THERMAL RESISTANCE KW thermal stress KW exhaust valves KW internal combustion engines KW contact thermal resistance KW galvanic coating KW thermal conductivity KW copper coating KW diesel engines KW thermal stress KW service life JO DEVELOPMENT PROSPECTS, INNOVATIONS AND INFORMATION TECHNOLOGIES IN TRANSPORT AU Novikov, A.P. AU Hripchenko, M.S. AU Chernikov, E.A. AU Novikova, I.A. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov