Abstract
Based on the analysis of literature data, it has been shown that a system of microcracks rapidly nucleates and develops in a surface layer of several grain sizes under fatigue loading. This brings about changes in the elastic modulus and density of the material. These can be described in the form of material’s effective characteristics.
The problem of the propagation of a surface wave has been solved for a microscopically inhomogeneous medium with dispersion and insignificant surface-layer variations. Using the example of testing 08Kh18N10T steel samples for low-cycle fatigue, it has been shown that the propagation speed of surface waves changes at a higher rate than that of bulk (longitudinal and shear) waves; this can be used in the tasks of testing materials at early stages of fatigue failure.
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References
Guseva, E.K., Kavarskaya, E.Z., and Ludzskaya, T.A., Determining the concentration and size of pores in ferrites based on acoustic characteristics, Defektoskopiya, 1979, no. 3, pp. 63–69.
Ustalost’ i vyazkost’ razrusheniya metallov (Fatigue and Viscosity of Metal Failure), Ivanova, V.S., Ed., Moscow: Nauka, 1974.
Finkel’, V.M., Fizicheskie osnovy tormozheniya razrusheniya (Physical Basics of Retardation of Failure), Moscow: Metallurgiya, 1977.
Ivanova, V.S., Ustalostnoe razrushenie metallov (Fatigue Failure of Metals), Moscow: Metallurgizdat, 1963.
Ivanova, V.S. and Terent’eva, V.F., Priroda ustalosti metallov (Nature of Metal Fatigue), Moscow; Metallurgiya, 1975.
Prokopenko, A.V. and Torgov, V.N., Surface properties and endurance limit of metals. Communication 1: dependence of yield strength on layer depth, Probl. Prochn., 1986, no. 4, pp. 28–34.
Prokopenko, A.V. and Torgov, V.N., Surface properties and endurance limit of metals. Communication 3. Model of fatigue failure of metal with allowance for anomalous properties of surface layer. Scale effect. Residual stresses, Probl. Prochn., 1986, no. 6, pp. 44–52.
Chaban, I.A., Method of self-consistent field as applied to calculating effective parameters of microscopically inhomogeneous media, Akust. Zh., 1964, vol. 10, no. 3, pp. 351–358.
Chaban, I.A., Calculating effective parameters of microscopically inhomogeneous media by the method of selfconsistent field, Akust. Zh., 1965, vol. 11, no. 1, pp. 102–109.
Nerazrushayushchii kontrol’. Spravochnik. V 8 t. (Nondestructive Testing. A Handbook in 8 Vols.), Klyuev, V.V., Ed., Moscow, Mashinostroenie, 2006.
Krivtsov, A.M., Deformirovanie I razrushenie tverdykh tel s mikrostrukturoi (Deformation and Destruction of Solid Bodies with Microstructures), Moscow: Fizmatlit, 2007.
Kryshtal, M.A. and Golovin, S.A., Vnutrennee trenie I struktura metallov (Internal Friction and Structure of Metals), Moscow: Metallurgiya, 1976.
Vavakin, A.S. and Salganik, R.L., On effective characteristics of inhomogeneous media with isolated inhomogeneities, Mekh. Tverd. Tela, 1975, no. 3, pp. 65–76.
Vavakin, A.S. and Salganik, R.L., Effective elastic characteristics of bodies with isolated cracks, cavities, and rigid inhomogeneities, Mekh. Tverd. Tela, 1978, no. 2, pp. 95–107.
Botvina, L.R., Kinetika razrusheniya konstruktsionnykh materialov (Kinetics of Failure in Construction Materials), Moscow: Nauka, 1989.
Botvina, L.R. and Barenblatt, G.I., Self-similarity of damage accumulation, Probl. Prochn., 1985, no. 12, pp. 17–24.
Uglov, A.L., Khlybov, A.A., Pichkov, S.N., and Shishulin, D.N., An acoustic method for estimating the thermal-pulsation-induced damage in austenitic steel, Russ. J. Nondestr. Test., 2016, vol. 52, no. 2, pp. 53–59.
Khlybov, A.A. and Uglov, A.L., Studying the accumulation of fatigue damages in steel 08Kh18N10T samples under low-cycle fatigue, Izv. Vyssh. Uchebn. Zaved., Chern. Metall., 2016, vol. 59, no. 3, pp. 185–190.
Shermergor, T.D., Teoriya uprugosti mikroneodnorodnykh sred (Theory of Elasticity of Microscopically Inhomogeneous Media), Moscow: Nauka, 1977.
Fedorov, V.V., Kinetika povrezhdaemosti i razrusheniya materialov (Kinetics of Damageability and Failure of Metals), Tashkent: FAN, 1985.
Viktorov, I.A., Zvukovye poverkhnostnye volny v tverdykh telakh (Acoustic Surface Waves in Solids), Moscow: Nauka, 1981.
Viktorov, I.A., Fizicheskie osnovy primenenia ul’trazvukovykh voln Releya i Lemba v tekhnike (Physical Basics of Applying Rayleigh and Lamb Ultrasonic Waves in Engineering), Moscow: Nauka, 1966.
Egorov, N.N., Attenuation of Rayleigh waves in an elastic layer lying on a half-space, Akust. Zh., 1961, vol. VII, no. 3, pp. 378–380.
Pangborn, R.N., Weissman, S., and Kramer, I.R., Dislocation distribution and prediction of fatigue damage, Metall. Trans., 1981, vol. 12A, pp. 109–120.
Vladimirov, V.I., Fizicheskaya priroda razrusheniya metallov (Physical Nature of Metal Failure), Moscow: Metallurgiya, 1984.
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Original Russian Text © A.A. Khlybov, 2018, published in Defektoskopiya, 2018, No. 6, pp. 3–10.
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Khlybov, A.A. Studying the Effect of Microscopic Medium Inhomogeneity on the Propagation of Surface Waves. Russ J Nondestruct Test 54, 385–393 (2018). https://doi.org/10.1134/S1061830918060049
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DOI: https://doi.org/10.1134/S1061830918060049