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Purpose: The aim of the paper is to evaluate the dependence of microstructure parameters, strength and plasticity of steel on crack faces friction factor. Design/methodology/approach: The specimens for the investigation were cut out from the 10 mm thick hot-rolled plate of 65G steel used as a model material for fatigue and durability testing of whole-rolled railway wheels. The mechanical characteristics of the steel were determined according to the state standard using cylindrical specimens of diameter 5 mm and effective length 50 mm. The specimens were heat-treated at the mentioned conditions. Fatigue testing under mode II loading was carried out on a special rigid loading machine in the standard laboratory conditions at symmetric sinusoidal cycle with a frequency of 12 Hz in the range of fatigue crack growth rates da/dN = 5∙10⁻⁸…5∙10⁻⁷ m/cycle until its reaches relative length l/b ≥ 0.8. The obtained microsections were investigated using the optical metallographic microscope Neophot 9 equipped with a digital camera Nikon D50 and electronic scanning microscope Zeiss EVO 40XVP. Hardness of the specimens with different microstructure was determined using durometer TK-2. The crack faces friction factor was determined using original device for fractured surfaces sliding under certain compression force realization. Findings: The dependences of microstructure parameters, strength and plasticity of steel on crack faces friction factor are obtained. Research limitations/implications: The investigation of the influence of microstructure parameters, strength and plasticity of real wheel steels on crack faces friction factor at the mode II fatigue crack growth will be carried out. Practical implications: The value of crack faces friction factor have strong impact on stress intensity at the crack tip and must be taken into account at crack growth rates curves plotting. Originality/value: Mode II fatigue crack faces friction factor of steel is firstly experimentally determined.
Wydawca
Rocznik
Tom
Strony
49--56
Opis fizyczny
Bibliogr. 20 poz.
Twórcy
autor
- Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Naukova St., 5, Lviv 79060, Ukraine
autor
- Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Naukova St., 5, Lviv 79060, Ukraine
autor
- Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Naukova St., 5, Lviv 79060, Ukraine
autor
- Department of Applied Materials Science and Materials Engineering, Lviv Polytechnic National University, Ustyyanovych str., 5, Lviv, 79013, Ukraine
autor
- Department of Applied Materials Science and Materials Engineering, Lviv Polytechnic National University, Ustyyanovych str., 5, Lviv, 79013, Ukraine
- The Jhon Paul II Catholic University of Lublin, Al. Racławickie 14, 20-950 Lublin, Poland
Bibliografia
- [1] V.V. Panasyuk, O.P. Ostash, O.P. Datsyshyn, et al, Service durability of railway high-strength steel wheels. In: Problems of life time and safety of operation of structures, constructions and machines. Kyiv: Paton Electric welding institute of NASU, 2009, 659-663 (in Ukrainian).
- [2] V.V. Panasyuk, O.P. Ostash, I.M. Andreiko et al, Standards for steel for prevention of operation defects on rolling surfaces of solid-rolled high-strength railway wheels. In: Problems of life time and safety of operation of structures, constructions and machines. Kyiv: Paton Electric welding institute of NASU, 2012, 659-663 (in Ukrainian).
- [3] O.P. Ostash, V.H. Anofriev, I.M. Andreiko, L.A Muradyan., Kulyk V.V. On the concept of selection of steels for high-strength railroad wheels. Mater. Sci. 48(6) (2013) 697–709.
- [4] . Olzak, J. Stupnicki, Variability of the stress intensity factor during the rolling load on the treadmill with crack, Proceedingsof the 7th National Conference on Fracture Mechanics, Kielce-Cedzyna, Poland, 1999 110-116 (in Polish).
- [5] Y. Murakami, C. Sakae, S. Hamada, Mechanism of rolling contact fatigue and measurement of _KIIth for steels, In: J.H. Beynon, M.W. Brown, T.C. Lindley et al (ed) Engineering Against Fatigu, Rotterdam: A. A. Balkema, 1999, 473-485.
- [6] Y. Murakami, Y. Fukushima, K. Toyama, S. Matsuoka, Fatigue crack path and threshold in Mode II and Mode III loadings. Engineering Fracture Mechanics. 75/3-4 (2008) 306-318.
- [7] O. Darchuk, Modelling of fatigue crack surface interaction under mode II loading, Proceedings of the 3th International Conference on Fracture Mechanics of Materials and Structural Integrity, Lviv, Ukraine, 2004 311-316 (in Ukrainian).
- [8] A. Dorogoy, L. Banks-Sills, Effect of crack face contact and friction on Brazilian disk specimens-A finite difference solution, Engineering Fracture Mechanics 72 (2005) 2758-2773.
- [9] P. Navratil, P. Skalka, P. Damborsky, M. Kotoul, Crack propagation in railway rim in a case of rectilinear ride, Proceedings of the 4th International Conference on Crack Paths, Gaeta, Italy, 2012, 1007-1014.
- [10] V.V. Panasyuk, O.P. Datsyshyn, Material Damages and Life Time of Solids under a Cyclic Contact. Procedia Materials Science 3 (2014) 1250-1256.
- [11] Y.L. Ivanyts’kyi., T.M. Lenkovs’kyi, V.M. Boiko, S.T. Shtayura, Methods for the construction of the kinetic diagrams of fatigue fracture for steels under the conditions of transverse shear with regard for the friction of crack lips, Journal of Materials Science 49(6) (2014) 749-754.
- [12] O.P. Datsyshyn, A.Y. Hlazov, A.B. Levus, Specific Features of Contact of the Faces of an Edge Crack Under Moving Hertzian Loads, Journal of Materials Science 49/5 (2014) 589-601.
- [13] State Standard GOST 27640-88, Engineering materials and lubricants, Experimental evaluation of coefficient of friction, Moscow: Standards Publishing, 1998, 21 (in Russian).
- [14] P.S. Kun, S.T. Shtayura, T.M. Lenkovs’kyi, Determination of the Stress Intensity Factor for a Transverse Shear Crack in a Beam Specimen, Journal of Materials Science 50/2 (2014) 212-216.
- [15] State Standard GOST 1497-84 Metals, Methods of tension test. Moscow: Standards Publishing, 1984, 36 (in Russian).
- [16] . Beckert, H. Klemm, Handbook of metallographic etching methods. Moscow: Metallurgy, 1988, 400 (in Russian).
- [17] Y.L. Ivanyts’kyi., S.T. Shtayur., T.M. Lenkovs’kyi. et al., Installation for the Formation of a Mode II Fatigue Crack in Beam Specimens, The patent of Ukraine no. 73715, 19 (2012) 4 (in Ukrainian).
- [18] T.A. Stolarski, Tribology in Machine Design. Butterworth-Heinemann, 1990, 298.
- [19] K. Aslantas, S. Tasgetiren, Edge Spalling Formation in a Plate due to Moving Compressive Load, Turkish Journal of Engineering and Environmental, 27/5 (2003) 333-338.
- [20] M. Guagliano, L. Vergani, Prediction of the Propagation of an Internal Crack under Rolling Contact Loads by a Weight Function Approach., Key Engineering Materials 251/252 (2003) 473-484.
Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).
Typ dokumentu
Bibliografia
Identyfikator YADDA
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