Fatigue crack growth resistance of welded joints simulating the weld-repaired railway wheels metal

• Autorzy: Ostash O. P. , Kulyk V. V. , Poznyakov V. D. , Haivorons’kyi O. A. , Markashova L. I. , Vira V. V. , Duriagina Z. A. , Tepla T. L.

Identyfikatory

DOI

10.5604/01.3001.0010.4885

• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the paper is to study the structure and fatigue crack growth resistance characteristics of weld metal (WM), and heat affected zone (HAZ) under cyclic loadings for the development of railway wheels weld-repairing technology. Design/methodology/approach: WM and HAZ of the welded joint were investigated. The welded joint of 65G steel (0.65 mass.% C; 0.19 Si; 0,91 Mn), which is a model material for high-strength railway wheels, was received by welding Sv-08HM wire per linear welding energy of 10 kJ/cm. Regimes of welding were selected so that the cooling rate of the metal in the temperature range 500-600°C was 5°C/s. As a result, the bainite structure in WM and bainite-martensite one in HAZ are formed. To eliminate the residual stresses generated after the weld cooling, heat treatment was proposed: holding at 100°C for 2 hour after cooling under temperature below then that at the beginning of martensite transformation. Fracture resistance under cyclic loading was estimated by fatigue crack growth rates diagrams (da/dN vs. ΔK) according to standard method for compact tension samples testing. The microstructure and fracture surface were investigated using an optical, and electronic scanning and transmission microscope. Findings: Microstructure parameters and fatigue crack growth resistance characteristics of WM and HAZ after the proposed heat treatment, and also residual stresses of the second kind and local strains in the bulk of bainite and martensite are obtained. Research limitations/implications: Investigations were conducted on samples that simulate the structure and properties of real renovated railway wheels made of steel with high content (0.65%) of carbon. Practical implications: Service durability and safety of weld-repaired railway wheels under high service loadings is increased. Originality/value: HAZ is the most dangerous zone in terms of fatigue cracks initiation and propagation in elements repaired by surfacing method. The positive result on the proposed heat treatment influence is received since the fatigue crack growth resistance characteristics of HAZ metal with bainite-martensite structure raise to the level of weld metal.

Słowa kluczowe

EN

railway wheels; repair; structure; fatigue; crack growth resistance; weld metal; Heat Affected Zone

PL

koło kolejowe; naprawa; strefa wpływu ciepła; struktura; odporność; pękanie zmęczeniowe

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2017
• Tom: Vol. 86, nr 2
• Strony: 49--55
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Ostash O. P.

• Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

autor

Kulyk V. V.

• Lviv Polytechnic National University, 12 Bandera St., Lviv, 79013, Ukraine

autor

Poznyakov V. D.

• Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyra Malevycha St., Kyiv, 03068, Ukraine

autor

Haivorons’kyi O. A.

• Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyra Malevycha St., Kyiv, 03068, Ukraine

autor

Markashova L. I.

• Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyra Malevycha St., Kyiv, 03068, Ukraine

autor

Vira V. V.

• Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5 Naukova St., Lviv 79060, Ukraine

autor

Duriagina Z. A.

• Lviv Polytechnic National University, 12 Bandera St., Lviv, 79013, Ukraine
• Katolicki Uniwersytet Lubelski im. Jana Pawła II, Al. Racławickie 14, 20-950 Lublin, Poland

autor

Tepla T. L.

• Lviv Polytechnic National University, 12 Bandera St., Lviv, 79013, Ukraine

Bibliografia

• [1] O.P. Ostash, V.H. Anofriev, I.M. Andreiko, L.A. Muradyan, V.V. Kulyk, On the concept of selection of steels for high-strength railroad wheels, Materials Science 48/6 (2013) 697-709, doi: https://doi.org/ 10.1007/s11003-013-9557-7.
• [2] G. Stevenot, F. Demille, L’innovation dans les roués ferroviates et l’volution des march’s, Revue Generale des Chemins de Fer 5 (2002) 33-39 (in French).
• [3] S.M. Zakharov, I.G. Goryacheva, Rolling contact fatigue defects in freight car wheels, Wear 258 (2005) 1142-1147.
• [4] S. Pal, W.J.T. Daniel, C.H.G. Valente, A. Wilson, A. Atrens, Surface damage on new AS60 rail caused by wheel slip, Engineering Failure Analysis 22 (2012) 152-165, doi: https://doi.org/10.1016/j.engfailanal. 2012.01.002.
• [5] H. Su, T. Pan, L. Li, C.-F. Yang, Y.-H. Cui, H.-Z. Ji, Frictional heat-introduced phase transformation on train wheel surface, Journal of Iron and Steel Research International 15/5 (2008) 49-56, doi: https://doi.org/ 10.1016/S1006-706X(08)60248-4.
• [6] J. Ahlstrom, B. Karlsson, Microstructural evaluation and interpretation of the mechanically and thermally affected zone under railway wheel flats, Wear 232 (1999) 1-14.
• [7] O.P. Ostash, I.M. Andreiko, V.V. Kulyk, V.I. Vavrukh, Influence of braking on the microstructure and mechanical behavior of steels of railroad wheel, Materials Science 48/5 (2013) 569-574, doi: https://doi.org/10.1007/s11003-013-9539-9.
• [8] E. Magel, M. Roney, J. Kalousek, P. Sroba, The blending of theory and practice in modern rail grinding, Fatigue and Fracture of Engineering Materials and Structures 26 (2003) 921-929, doi: 10.1046/j.1460-2695.2003.00669.x.
• [9] P. Hansson, ESAB delivers engineered automatic welding station to Ghana in Africa for build-up welding of worn railway wheels, Svetsaren 56/1 (2001) 20-21.
• [10] N.V. Pavlov, I.D. Kozubenko, I.E. Byzova, A.I. Rassokha, Surfacing of wagon wheels flange, Railway Transport 7 (1993) 37-40.
• [11] DSTU GOST 10791:2016, All-rolled wheels, Specification, Ukraine.
• [12] AAR Manual of Standards and Recommended Practices Wheels and Axles. Wheels, Carbon Steel. Specification M-107/M-208, 2016 (USA).
• [13] Standard test method for measurement of fatigue crack growth rates, ASTM E647-08, V03.01, ASTM, 2008.
• [14] L.I. Markashova, V.D. Poznyakov, A.A. Gaivoronskii, E.N. Berdnikova, T.A. Alekseenko, Estimation of the strength and crack resistance of the metal of railway wheels after long-term operation, Materials Science 47/6 (2012) 799-806, doi: https://doi.org/10.1007/ s11003-012-9458-1.
• [15] L.I. Markashova, V.D. Poznyakov, E.N. Berdnikova, A.A. Gaivoronskii, T.A. Alekseenko, Influence of structural factors on the mechanical properties and crack resistance of welded joints of metals, alloys, and composite materials, Avtomaticheskaya Svarka 6-7 (2014) 25-31.
• [16] O.P. Ostash, I.M. Andreiko, V.V. Kulyk, O.I. Babachenko, V.V. Vira, Influence of the mode of thermal treatment and load ratio on the cyclic crackgrowth resistance of wheel steels, Materials Science 45/2 (2009) 211-219, doi: https://doi.org/10.1007/ s11003-009-9177-4.
• [17] O.P. Ostash, O.A. Haivoronskyi, V.D. Pozniakov, V.V. Kulyk, Patent of Ukraine 105440. Method for heat treatment of high-strength low-alloyed carbon steels, Published: 25.03.2016, Bulletin 6.