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Strain Accumulated during Equal-Channel Angular Pressing and Its Components

  • PHYSICAL FOUNDATIONS OF STRENGTH AND PLASTICITY
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Russian Metallurgy (Metally) Aims and scope

Abstract

A new approach to calculating the strain after equal-channel angular pressing is proposed. It is based on the kinematics of material points traveling along physical mass-transfer trajectories. Formulas for determining the accumulated strain and its shear and rotation (torsion) components are derived. The strain component distribution is found as a function of the cross section of a workpiece and the angle of the channel intersection in a die is established. The calculation results are verified.

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Notes

  1. More complex tensors, which characterize the gradients of the components of these vectors, are used to account for large material particle displacements and rotation vectors [11].

  2. G.I. Raab and A.G. Raab, “Method for producing ultrafine-grained semifinished products by drawing and torsion,” RF Patent 2 347 632.

  3. ECAP refers to a plane strain [4]. In the case of volume SPD, one should use spherical coordinates to describe the trajectory length as a function of the radius vector and the zenith and azimuthal angles of its rotation.

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ACKNOWLEDGMENTS

This work was performed within the state assignment of the Institute for Metals Superplasticity Problems of the Russian Academy of Sciences and supported in part by the Russian Foundation for Basic Research, project no. 16-02-00094.

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Authors and Affiliations

  1. Institute for Metals Superplasticity Problems, Russian Academy of Sciences, 450001, Ufa, Russia

    F. Z. Utyashev

  2. Ufa State Aviation Technical University, 450001, Ufa, Russia

    R. Z. Valiev, G. I. Raab & A. K. Galimov

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  1. F. Z. Utyashev
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  2. R. Z. Valiev
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  3. G. I. Raab
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  4. A. K. Galimov
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Correspondence to F. Z. Utyashev.

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Translated by T. Gapontseva

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Utyashev, F.Z., Valiev, R.Z., Raab, G.I. et al. Strain Accumulated during Equal-Channel Angular Pressing and Its Components. Russ. Metall. 2019, 281–288 (2019). https://doi.org/10.1134/S0036029519040311

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  • DOI: https://doi.org/10.1134/S0036029519040311

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