Galkin V.V., Bazhenov E.O., Gavrilov G.N., Vashurin A.V., Cherepenkin D.V. On the Construction of Recrystallization Dependencies for Metallic Materials

DOI: 10.18503/1995-2732-2026-24-2-146-115

Abstract

Problem Statement (Relevance). In mechanical engineering, a significant proportion of metallic products are manufactured by hot deformation processes, during which recrystallization occurs, affecting structural transformations and the mechanical properties of the material. An analytical review of recrystallization diagram construction methods showed that compression testing is the conventional approach; however, it has several unresolved issues, including high labor intensity, insufficient accuracy in determining the initial section of the diagrams, limited information on grain-size heterogeneity, and the inability to directly apply the diagrams to industrial processes characterized by complex stress states. Objectives. The research is aimed at development of a method for constructing recrystallization diagrams that reduces the number of tests required at each temperature, enables the assessment of grain-size heterogeneity, and allows the obtained recrystallization dependencies to be applied to industrial deformation processes. The main approach to solving these issues involved the application of mathematical methods and numerical simulation technologies for solid-body deformation processes. Originality. A simulation model of cylindrical specimen compression was developed for constructing recrystallization diagrams. The model was used to evaluate the strain intensity over the entire surface of longitudinal sections of compressed specimens at reductions of 10 and 50%, according to a coordinate grid with a spacing of 2.0×2.0 mm. This approach made it possible to identify specific zones for metallographic analysis aimed at determining the average grain size and grain-size heterogeneity. The proposed method expanded the possibilities for identifying recrystallization mechanisms depending on temperature and strain degree. Result. The developed method was validated through the construction of type II recrystallization dependencies for X18H10T austenitic steel. The obtained recrystallization dependencies, supplemented by grain-size heterogeneity data, provided enhanced capabilities for evaluating recrystallization mechanisms within the temperature range of 1050-1150°C and for strain intensity values up to εi = 0,75. Practical Relevance. The proposed method makes it possible to simultaneously construct Type III recrystallization diagrams and to establish recrystallization dependencies as a function of accumulated (total) strain.

Keywords

Recrystallization of metallic materials, strain intensity, grain size, recrystallization dependencies.

For citation

Galkin V.V., Bazhenov E.O., Gavrilov G.N., Vashurin A.V., Cherepenkin D.V. On the Construction of Recrystallization Dependencies for Metallic Materials. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2026, vol. 24, no. 2, pp. 146-155. https://doi.org/10.18503/1995-2732-2026-24-2-146-155

Vladimir V. Galkin – DrSc (Eng.), Professor of the Department of Machine-Building Technological Complexes, Nizhny Novgorod State Technical University named after R.E. Alekseev, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0009-0007-6106-5253

Evgeny O. Bazhenov – Senior Lecturer of the Department of Machine-Building Technological Complexes, Nizhny Novgorod State Technical University named after R.E. Alekseev, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0003-0193-6065

Gennady N. Gavrilov – DrSc (Eng.), Professor of the Department of Materials Science, Materials Technology and Heat Treatment of Metals, Nizhny Novgorod State Technical University named after R.E. Alekseev, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0002-8306-2965

Alexey V. Vashurin – Deputy Head of Production, Head of the Blacksmithing and Foundry Shop, Sokol Aircraft Plant, branch of JSC Russian Aircraft Corporation “MiG”, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Dmitry V. Cherepenkin – Chief Designer, Head of the Design Department of Blacksmithing Production, JSC GAZ, Nizhny Novgorod, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it..

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