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Microstructure of V-4Ti-4Cr Alloy After Deformation by Multi-Directional Pressing

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Using transmission electron microscopy, the features of the grain and defect structure of the V–4Ti–4Cr alloy after 16 acts of biaxial and triaxial pressing at room temperature are studied. The microstructure of the alloy after these treatments is a structural composite with the elements of fine-crystalline and submicrocrystalline states. The defect structure is characterized by a crystal lattice curvature from 10 to 30°/μm. It is established that biaxial pressing contributes to a more intensive grinding of the crystallites and a formation of an anisotropic microstructure. The dislocation-disclination mechanism and localization in the direction of maximum shear stresses are thought to be the main mechanisms of structural transformation under conditions of high-strength state, formed as a consequence of dispersion strengthening by the second phase particles. The role of local internal stresses and their gradients in the processes of crystal lattice fragmentation under conditions of severe plastic deformations is discussed.

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Authors and Affiliations

  1. Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia

    K. V. Grinyaev, I. V. Smirnov, I. A. Ditenberg, A. N. Tyumentsev, Yu.P. Pinzhin, A. D. Korotaev & D. A. Osipov

  2. National Research Tomsk State University, Tomsk, Russia

    K. V. Grinyaev, I. V. Smirnov, I. A. Ditenberg, A. N. Tyumentsev, Yu.P. Pinzhin, A. D. Korotaev & D. A. Osipov

Authors
  1. K. V. Grinyaev
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  2. I. V. Smirnov
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  3. I. A. Ditenberg
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  4. A. N. Tyumentsev
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  5. Yu.P. Pinzhin
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  6. A. D. Korotaev
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  7. D. A. Osipov
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Correspondence to K. V. Grinyaev.

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Grinyaev, K.V., Smirnov, I.V., Ditenberg, I.A. et al. Microstructure of V-4Ti-4Cr Alloy After Deformation by Multi-Directional Pressing. Russ Phys J 66, 713–720 (2023). https://doi.org/10.1007/s11182-023-02997-y

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  • DOI: https://doi.org/10.1007/s11182-023-02997-y

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