Abstract—The evolution of the structure and defect substructure of rail steel during uniaxial compression to a reduction of 50% is studied. The strain hardening is found to have a multistage character and to be accompanied by fragmentation of pearlite grains, which increases with the strain. An increase in the strain is accompanied by a decrease in the scalar and excess dislocation densities. Cementite plates are found to undergo destruction via their dissolution and cutting by mobile dislocations.
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ACKNOWLEDGMENTS
We thank E.V. Polevoi for providing the rail steel specimens and N.A. Popova for helpful discussions.
Funding
This work was supported by the Russian Foundation for Basic Research (project no. 19-32-60001) and a scholarship of the President of the Russian Federation for young scientists and postgraduates engaged in promising research and development in priority areas of modernization of the Russian economy (project no. SP-4517.2021.1).
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Translated by K. Shakhlevich
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Ivanov, Y.F., Gromov, V.E., Aksenova, K.V. et al. Evolution of the Structure of Rail Steel during Compression. Russ. Metall. 2022, 1192–1197 (2022). https://doi.org/10.1134/S0036029522100354
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DOI: https://doi.org/10.1134/S0036029522100354