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Metal processing by severe plastic deformation

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“Metals are bright forgeable bodies.”

M. V. Lomonosov

Abstract

The mechanics of severe plastic deformation (SPD) is considered. Unlike steady-state plastic flows with the continuous evolution of dislocation structures, the SPD-induced microlocalization strongly depends on the deformation mode. The quantitative characteristic of a deformation mode is determined by the distribution of strain rates over the principal directions of a continuum shear and corresponds to the limiting states of pure shear and simple shear. Simple models of SPD mesomechanics demonstrate that a deformation mode affects a transition to localization, localization in shear bands, and rotational localization. The simple shear mode is shown to correspond to the optimum scheme of plastic structure formation, including the development of high-angle boundaries and grain refinement. Various SPD processes are analyzed in terms of simple shear.

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Authors and Affiliations

  1. Howel, Michigan, USA

    V. M. Segal

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  1. V. M. Segal
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Original Russian Text © V.M. Segal, 2006, published in Metally, 2006, No. 5, pp. 130–141.

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Segal, V.M. Metal processing by severe plastic deformation. Russ. Metall. 2006, 474–483 (2006). https://doi.org/10.1134/S003602950605017X

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  • DOI: https://doi.org/10.1134/S003602950605017X

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