Actual Problems in Machine Building 2018 Vol. 5 No. 1-2

Actual Problems in Machine Building. Vol. 5. N 1-2. 2018 Materials Science in Machine Building ____________________________________________________________________ 144 USE OF ACOUSTIC EMISSION FOR WEAR CONTROL OF GADFIELD STEEL Lychagin D.V. 1,2 , D.Sc. (Physics and Mathematics), Professor, e-mail: dvl-tomsk@mail.ru Novitskaya O.S. 1,3 , Post-graduate Student, e-mail: novoolbka@mail.ru Filippov A.V. 2,3 , Ph.D. (Engineering), e-mail: avf@ispms.tsc.ru 1 National Research Tomsk University, 36 Lenin Avenue, Tomsk, 634050, Russian Federation 2 National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation 3 Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, 2/4 pr. Akademicheskii, Tomsk, 634021, Russian Federation Abstract Testing of an acoustic emission signal is need for monitoring of tribological system. It gives information on features of wear. Crystallographic orientation of Hadfield steel influences the deformation mechanism. It can be sliding and twinning. We set differences in a dry friction and wear for cases of sliding and sliding with twinning. We determined parameters of an acoustic emission signal for these cases. We connected them to curves of friction and features of wear. Acoustic emission defines the moment of transition of a tribological system from area of burn-in to area of the set friction precisely. Signals of acoustic emission are the small amplitude and burst type signals within a burn-in stage. Signal amplitudes and the number of surges increase within stages of the set friction. Alternation of deformation hardening and the active wear is watched for single crystals with orientation for sliding and twinning. Parameters of a signal of acoustic emission reflect these changes. Keywords sliding friction, wear, acoustic emission, Hadfield's steel, single crystal