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<p>For several steels of different classes and crystal structures, the influence of large plastic deformations – in tension, torsion, and bending – as well as low-cycle fatigue on the electrical resistivity of the specimen material, taken here as a measure of damageability, has been investigated. It was established experimentally that, unlike other deformation modes, tension leads to a decrease in the electrical resistivity of 03Kh20N16AG6, 03Kh13N9G19AM2, ON9, and M76 steels. Damageability and its specific value are evaluated per unit of residual plastic strain, twist angle, and load cycle. In particular, under tension the greatest sensitivity to deformation by this criterion was exhibited by rail steel M76 (pearlitic class), and the least by 03Kh13N9G19AM2 austenitic steel. For material subjected to triaxial tension in the region of a circumferential notch, treatment by a high-density pulsed electric current led to a significant reduction of the electrical resistance in the notch zone, indicating the possibility of healing damage accumulated under a triaxial stress–strain state by current pulses.</p>

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Effect of Various Types of Plastic Deformation and Pulsed Electric Current on the Damageability of Steels

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • E. V. Vorobyov,
  • L. S. Novogrudskyi,
  • M. P. Adamchuk,
  • M. P. Zemtsov

摘要

For several steels of different classes and crystal structures, the influence of large plastic deformations – in tension, torsion, and bending – as well as low-cycle fatigue on the electrical resistivity of the specimen material, taken here as a measure of damageability, has been investigated. It was established experimentally that, unlike other deformation modes, tension leads to a decrease in the electrical resistivity of 03Kh20N16AG6, 03Kh13N9G19AM2, ON9, and M76 steels. Damageability and its specific value are evaluated per unit of residual plastic strain, twist angle, and load cycle. In particular, under tension the greatest sensitivity to deformation by this criterion was exhibited by rail steel M76 (pearlitic class), and the least by 03Kh13N9G19AM2 austenitic steel. For material subjected to triaxial tension in the region of a circumferential notch, treatment by a high-density pulsed electric current led to a significant reduction of the electrical resistance in the notch zone, indicating the possibility of healing damage accumulated under a triaxial stress–strain state by current pulses.