PSI - Issue 36

Sergiy Bezhenov et al. / Procedia Structural Integrity 36 (2022) 356–361 S. Bezhenov / Structural Integrity Procedia 00 (2021) 000–000

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4. Conclusions

It is shown that ultrasonic hardening of the surface of products has a positive e ff ect on the fatigue resistance characteristics of all test materials. Features of cyclic AE characteristics which are identical for di ff erent classes of materials with di ff erent technolog ical heredity are established. It is revealed that the cyclic AE characteristics of samples of materials of di ff erent classes, having fundamentally similar behavior, di ff er in absolute values of the growth rates of AE activity of materials. An empirical formula is proposed that relates the stress corresponding to the breaking point of the cyclic AE char acteristic of a custom-designed model sample of di ff erent materials in a certain technical condition to the endurance limit. Bezhenov, S.A., 2008. About some methodological problems of the theory of the fatigue fracture of structural materials, Reliability and Durability of Machines and Structures 30, pp. 6 – 14. (in Russian) Bezhenov, S.A., 2012. The mechanical behaviour model of the metallic materials under the high-cyclic fatigue conditions, Problems of Computa tional Mechanics and Structural Strength 20, pp. 66–73. (in Russian) Bezhenov, S.O., 2015. Acoustic emission model of cyclic degradation product of structural metallic materials, IV International Conference In service Damage of Materials, its Diagnostics and Prediction. Ternopil, Ukraine, Proceedings pp. 64–67. (in Ukrainian) Dunegan, H.L., 1975. Using acoustic emission technology to predict structural failure, Met. Eng. Quarterly 1, pp. 8–16. Hudramovich, V.S., Skalskiy, V.R., Selivanov, Yu.M., 2017. Holographic and acoustic emission diagnostics of inhomogeneous structures and materials. Prostir-M, Lviv. (in Ukrainian) Ivanova, V.S., Terent’yev, V.F., 1975. The nature of the fatigue of metals. Metallurgy, Moscow. (in Russian) Liptai, R.G., Harris, D.O., Engle, R.B., Tatro, C.A., 1971. Acoustic emission technique in materials research, Int. J. of Nondestructive Testing 3, pp. 215– 275. McEvily, A.J., 2010. The analysis of the emergency failures. Technosfera, Moscow. (in Russian) Petukhov, A.N., 2006. Features of the formation of the properties of the surface layer of the main components of a gas turbine engine using traditional and modern hardening methods, Herald of aeroenginebuilding 2, pp. 20–24. (in Russian) Pisarenko, G.G., Matokhnyuk, L.E., Voinalovych, O.V., Kofto, D.G., 2014. Prediction of Fatigue Resistance Characteristics of Structural Materials at Large Numbers of Loading Cycles. Strength Mater 46, pp. 619–624. Skalskiy, V.R., Andreykiv, O.E., 2006. Evaluation of the volume damage of materials by means of the acoustic emission method. Ivan Franko Publishing Center, Lviv. (in Ukrainian) Tetelman, A.S., Chow, R., 1972. Acoustic emission testing and microcracking processes, Acoustic emission, ASTM STP 505, pp. 30–40. Tsyban’ov, G.V., Novikov, A.I., Kurash, Yu.P., 2020. Analysis of fatigue crack growth rate in steels due to plastic deformation and fracture at its top. Message 2. Establishing the relationship between the parameters of fatigue crack growth and plastic deformation, Strength of Materials 6, pp. 100–112. Yasniy, O., Pyndus, Yu., Iasnii, V., Lapusta, Y., 2017. Residual lifetime assessment of thermal power plant superheater header, Engineering Failure Analysis 82, pp. 390–403. Yokobori, T., 1978. Scientific backgrounds of the strength and fracture of the materials. Naukova dumka, Kiyev. (in Russian) References