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Materials Science

, Volume 54, Issue 3, pp 326–332 | Cite as

On the Influence of Curvature of the Trajectories of Deformation of a Volume of the Material by Pressing on Its Plasticity Under the Conditions of Complex Loading

  • V. А. Ogorodnikov
  • I. А. Dereven’ko
  • R. I. Sivak
Article
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In the experimental investigations of the plasticity of cylindrical specimens of R9, R12, and R18 steels, subjected to simultaneous torsion with tension, it is discovered that, under the conditions of complex loading, the rate of accumulation of defects and their healing in the form of derivatives of the parameters of stressed state exerts a significant influence on the characteristics of plasticity. It is shown that, under these conditions, when the first and second derivatives of the dimensionless parameter of stressed state grow, the influence of curvature of the deformation paths of particles in the material on plasticity becomes more pronounced. The accumulated results enable us to select the phenomenological criteria of fracture, which give more reliable results of estimation of the applied plasticity resource in the technological processes of pressure treatment.

Keywords

deformability of metals complex loading deformation path loading trajectory deformation trajectory deformation history accumulation of defects 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • V. А. Ogorodnikov
    • 1
  • I. А. Dereven’ko
    • 1
  • R. I. Sivak
    • 1
  1. 1.Vinnitsa National Technical UniversityVinnitsaUkraine

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