Abstract
Structural transformations of the carbide phase in Hadfield steel (110G13) that occur upon plastic deformation by dry sliding friction have been studied by methods of optical metallography, X-ray diffraction, and transmission electron microscopy. Deformation is shown to lead to the refinement of the particles of the carbide phase (Fe, Mn)3C to a nanosized level. The effect of the deformation-induced dissolution of (Fe, Mn)3C carbides in austenite of 110G13 (Hadfield) steel has been revealed, which manifests in the appearance of new lines belonging to austenite with an unusually large lattice parameter (a = 0.3660–0.3680 nm) in the X-ray diffraction patterns of steel tempered to obtain a fine-lamellar carbide phase after deformation. This austenite is the result of the deformation-induced dissolution of disperse (Fe, Mn)3C particles, which leads to the local enrichment of austenite with carbon and manganese. The tempering that leads to the formation of carbide particles in 110G13 steel exerts a negative influence on the strain hardening of the steel, despite the increase in the hardness of steel upon tempering and the development of the processes of the deformation-induced dissolution of the carbide phase, which leads to the strengthening of the γ solid solution.
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Original Russian Text © L.G. Korshunov, V.V. Sagaradze, N.L. Chernenko, V.A. Shabashov, 2015, published in Fizika Metallov i Metallovedenie, 2015, Vol. 116, No. 8, pp. 867–873.
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Korshunov, L.G., Sagaradze, V.V., Chernenko, N.L. et al. Friction-induced structural transformations of the carbide phase in Hadfield steel. Phys. Metals Metallogr. 116, 823–828 (2015). https://doi.org/10.1134/S0031918X15080098
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DOI: https://doi.org/10.1134/S0031918X15080098