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<p>The results of the experimental study of the electroplastic effect on coarse-grained Grade&#xa0;2 titanium under tension are presented. A comparison is made of the deformation behavior without current and with current of various modes differing in density and duty cycle. The structure evolution of the samples is investigated for different parameters of the pulsed electric current. It is shown that increasing the intensity of the electric pulse treatment results in the reduction of both yield stress and plasticity. Tension without current activates two mechanisms of plastic deformation - dislocation sliding and twinning at relatively high tensile stress. Pulsed electric current activates dislocation sliding, resulting in reduction of tensile stress and suppression of twinning. As a result, dislocation pileups initiate fracture earlier than when both plastic deformation mechanisms are active. The results demonstrate the possibility of significantly reducing the flow stress of titanium with a slight decrease in elongation at break.</p> Graphic Abstract <p></p>

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Competing deformation mechanisms of Grade 2 titanium under electrically assisted tension

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Gulnara R. Khalikova,
  • Oleg E. Korolkov,
  • Vladimir V. Stolyarov,
  • Elena A. Korznikova,
  • Sergey V. Dmitriev

摘要

The results of the experimental study of the electroplastic effect on coarse-grained Grade 2 titanium under tension are presented. A comparison is made of the deformation behavior without current and with current of various modes differing in density and duty cycle. The structure evolution of the samples is investigated for different parameters of the pulsed electric current. It is shown that increasing the intensity of the electric pulse treatment results in the reduction of both yield stress and plasticity. Tension without current activates two mechanisms of plastic deformation - dislocation sliding and twinning at relatively high tensile stress. Pulsed electric current activates dislocation sliding, resulting in reduction of tensile stress and suppression of twinning. As a result, dislocation pileups initiate fracture earlier than when both plastic deformation mechanisms are active. The results demonstrate the possibility of significantly reducing the flow stress of titanium with a slight decrease in elongation at break.

Graphic Abstract