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Structure of Iron Deformed at 250°С by Torsion under a Pressure

  • STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION
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Abstract

Transmission electron microscopy and scanning electron microscopy were used to study the evolution of the structure of iron (of 99.97% purity) in the course of deformation at 250°С by torsion under pressure. Electron back-scattered diffraction analysis was used to determine the size of recrystallized grains, their orientation, angular range of grain-boundary misorientation, and fraction of recrystallized structure. It was found that, upon deformation at 250°С by torsion under a pressure, the dynamic recrystallization of iron starts on reaching the true strain е = 2.4. At the steady stage of deformation, the structure with an average grain size of 0.5 µm forms, which is characterized by the absence of any preferential orientation.

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ACKNOWLEDGMENTS

TEM and SEM studies were performed at the Collective Use Testing Center for Nanotechnologies and Advanced Materials of the Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences. We thank N.V. Nikolaeva for her assistance in performing EBSD studies.

Funding

This study was performed in terms of state task (theme Davlenie, no. АААА-А18-118020190104-3).

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Authors and Affiliations

  1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620108, Ekaterinburg, Russia

    M. V. Degtyarev, V. P. Pilyugin, T. I. Chashchukhina & L. M. Voronova

  2. Ural Federal University Named after the First President of Russia B.N. Yeltsin, 620002, Ekaterinburg, Russia

    M. V. Degtyarev, V. P. Pilyugin & T. I. Chashchukhina

Authors
  1. M. V. Degtyarev
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  2. V. P. Pilyugin
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  3. T. I. Chashchukhina
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  4. L. M. Voronova
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Corresponding author

Correspondence to L. M. Voronova.

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Translated by N. Kolchugina

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Degtyarev, M.V., Pilyugin, V.P., Chashchukhina, T.I. et al. Structure of Iron Deformed at 250°С by Torsion under a Pressure. Phys. Metals Metallogr. 120, 1193–1199 (2019). https://doi.org/10.1134/S0031918X19120044

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  • DOI: https://doi.org/10.1134/S0031918X19120044

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