The structure and micromechanism of crack growth in steel 09G2S are studied after heat and thermal deformation treatments involving cold radial forging (CRF) with 55% total deformation and subsequent annealing at 300 and 600°C. A method for electron microscope panoramic X – Y – Z joining of images of a fracture surface with level difference up to 3 mm is developed and tested. The structure under a fracture surface of steel 09G2S after CRF and annealing at 300°C is studied. The positive role of bands of adiabatic shear forming in the structure under cold radial forging in dispersion of the steel is demonstrated. Special features of the micromechanism of crack growth due to formation of splits are determined.
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G. V. Kurdyumov, L. M. Utevskii, and R. I. Éntin, Transformations in Iron and Steel [in Russian], Nauka, Moscow (1977), 236 p.
R. Z. Valiev, A. V. Korznikov, and R. R. Milyukov, “Structure and properties of ultrafine-grained materials produced by severe plastic deformation,” Mater. Sci. Eng. A, 186, 141 – 148 (1993).
T. I. Tabatchikova, I. L. Yakovleva, S. Yu. Delgado Reina, et al., “Influence of warm deformation on the formation of a fragmental structure in low-carbon martensitic steels,” Phys. Met. Metallogr., 117(1), 61 – 73 (2016).
G. A. Salishchev, O. R. Valiakhmetov, R. M. Geleev, and S. P. Malysheva, “Formation of submicrocrystalline structure in titanium under plastic deformation and its effect on mechanical properties,” Metally, No. 4, 86 – 91 (1996).
A. M. Glezer and L. S. Metlov, “Megaplastic deformation of solid bodies,” Fiz. Tekh. Vysok. Davl., 18(4), 21 – 36 (2008).
Yu. N. Simonov, A. P. Nishta, S. S. Yugay, and A. S. Pertsev, “Refinement of the structure of steel 35Kh up to the nanolevel with the aim to create materials for high-pressure vessels,” Metalloved. Term. Obrab. Met., No. 11, 7 – 12 (2010).
V. M. Schastlivtsev, T. I. Tabatchikova, I. L. Yakovleva, et al., “Effect of thermomechanical treatment on the resistance of low carbon alloy steel to brittle fracture,” Phys. Met. Metallogr., 116(2), 189 – 199 (2015).
M. Yu. Simonov, G. S. Shaimanov, A. S. Pertsev, et al., “Effect of structure on the dynamic crack resistance and special features of the micromechanism of crack growth in steel 35Kh after cold radial forging,” Met. Sci. Heat Treat., 58(2), 82 – 90 (2016).
M. Yu. Simonov, G. S. Shaimanov, A. S. Pertsev, et al., “Dynamic crack resistance and structure of a tubular billet from steel 09G2S after thermal deformation treatment,” Metalloved. Term. Obrab. Met., No. 6, 64 – 71 (2017).
E. G. Astafurova, S. V. Dobatkin, E. V. Naidenkin, et al., “Structural and phase transformations in nanostructured steel 10G2FT during cold torsional deformation under pressure and subsequent heating,” Ross. Nanotekhnol., 4(1 – 2), 162 – 174 (2009).
M. V. Chukin, N. V. Koptseva, R. Z. Valiev, et al., “Diffraction electron-microscope analysis of submicrocrystalline and nanocrystalline structure of structural carbon steels after equal channel angular pressing and subsequent deformation,” Vest. MGTU Im. G. I. Nosova, No. 1, 31 – 37 (2008).
R. Z. Valiev, “Creation of nanostructured metals and alloys with unique properties using severe plastic deformations,” Ross. Nanotekhnol., 1(1 – 2), 208 – 216 (2006).
O. B. Naimark, “Collective properties of ensembles of defects and some nonlinear problems of plasticity and fracture,” Fiz. Mesomekhan., 6(4), 45 – 72 (2003).
V. E. Panin, Yu. V. Grinyaev, V. I. Danilov, et al., Structural Levels of Plastic Deformation and Fracture [in Russian], Novosibirsk, Nauka (1990), 225 p.
V. V. Rybin, High Plastic Deformations and Fracture of Metals [in Russian], Metallurgiya, Moscow (1986), 224 p.
O. B. Naimark and M. A. Sokovnikov, “On the mechanism of adiabatic shear under high-speed loading of materials,” Matem. Model. Sist. Prots., No. 3, 71 – 76 (1995).
C. Froustey, O. B. Naimark, I. A. Panteleev, et al., “Multiscale structural relaxation and adiabatic shear failure mechanisms,” Phys. Mesomechan., 20(1), 31 – 42 (2017).
D. Rittel, Z. G. Wang, and M. Merzer, “Adiabatic shear failure and dynamic stored energy of cold work,” Phys. Rev. Lett., No. 96, 075502 (1 – 4) (2006).
T. W. Wright, The Physics and Mathematics of Adiabatic Shear Bands, University Press, Cambridge (2002), p. 240.
A. F. Belikova, S. N. Buravova, Yu. A. Gordopolov, and I. V. Saikov, “Nature of formation of bands of localized strain under dynamic loads,” Vest. TGU, 16(3), 908 – 909 (2010).
A. F. Belikova, S. N. Buravova, and Yu. A. Gordopolov, “Localized strain and its relation to the deformed condition of the material,” Zh. Tekh. Fiz., 83(2), 153 – 155 (2013).
D. Rittel, Z. G. Wang, and M. Merzer, “Adiabatic shear failure and dynamic stored energy of cold work,” Phys. Rev. Lett., No. 96, 075502 (1 – 4) (2006).
M. Yu. Simonov, A. S. Pertsev, G. S. Shaimanov, and Yu. N. Simonov, “Cold resistance of structural steel subjected to cold radial forging,” Metalloved. Term. Obrab. Met., No. 10, 15 – 25 (2019).
G. V. Klevtsov, R. Z. Valiev, N. A. Klevtsova, et al., “Strength and mechanisms of fracture of nanostructured metallic materials under single loading,” Metalloved. Term. Obrab. Met., No. 9, 54 – 62 (2017).
V. A. Tyurin, V. A. Lazorkin, I. A. Pospelov, et al., Forging in Radial Swaging Machines [in Russian], Mashinostroenie, Moscow (1990), 256 p.
A. A. Shanyavskii, “Rotary instability of deformation and fracture of metals under propagation of fatigue cracks at mesoscopic and scale level. I. Processes of plastic deformation at the tip of the crack,” Fiz. Mesomekhan., 4(1), 73 – 80 (2001).
D. O. Panov, A. N. Balakhnin, A. S. Pertsev, et al., “Refinement of quenched low-carbon steel under cold plastic deformation and subsequent intense heat treatment,” Izv. Vysh. Uchebn. Zaved., Chern. Metall., No. 9, 75 – 61 (2013).
M. Yu. Simonov, O. B. Neimark, Yu. N. Simonov, et al., “Structural aspects of zones of plastic strain. Part I. Effect of adiabatic shear,” Metalloved. Term. Obrab. Met., No. 10, 43 – 53 (2019).
M. Yu. Simonov, Yu. N. Simonov, O. B. Neimark, et al., “Structural aspects of zones of plastic strain. Part III. Effect of thermal stability of adiabatic shear bands,” Metalloved. Term. Obrab. Met., No. 10, 64 – 76 (2019).
M. Yu. Simonov, “Structural aspects of zones of plastic strain. Part II. Effect of mass transfer,” Metalloved. Term. Obrab. Met., No. 10, 54 – 63 (2019).
M. Yu. Simonov, M. N. Georgiev, G. S. Shaimanov, et al., “Comparative analysis of zones of plastic strain, dynamic crack resistance, structure and micromechanisms of crack growth in steels 09G2S, 25 and 40 in high-toughness condition,” Metalloved. Term. Obrab. Met., No. 2, 39 – 48 (2016).
M. Yu. Simonov, Yu. N. Simonov, and G. S. Shaimanov, “Structure, dynamic crack resistance and micromechanism of crack growth in tubular billets after thermal deformation treatment,” Fiz. Met. Metalloved., 119(1), 54 – 62 (2008).
G. S. Shaimanov, M. Yu. Simonov, Yu. N. Simonov, and A. S. Pertsev, “Special features of fracture surface of steel 09G2S after cold radial forging,” Vest. PNIPU, Mashinostr., Materialoved., 18(3), 119 – 134 (2016).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 50 – 15, October, 2019.
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Simonov, M.Y., Simonov, Y.N. & Shaimanov, G.S. Structural and Fractographic Features of Formation of Splits in Low-Alloy Steel Subjected to Thermal Deformation Treatment. Met Sci Heat Treat 61, 591–600 (2020). https://doi.org/10.1007/s11041-020-00466-8
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DOI: https://doi.org/10.1007/s11041-020-00466-8