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<p>An anomalous high-strain-rate softening phenomenon was demonstrated in a high-strength quenching and partitioning (Q&amp;P) steel. It was found that the high-strain-rate softening in the Q&amp;P steel is caused by the intrinsic carbon-dislocation interaction, rather than transformation induced plasticity effect, dislocation density difference, or adiabatic heating. The key mechanism is ascribed to the disappeared Cottrell drag force during high-strain-rate deformation, which originates from carbon-dislocation interaction and is present during quasi-static deformation.</p>

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Intrinsic High-Strain-Rate Softening in a High-Strength Quenching and Partitioning Steel

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月27日

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  • C. P. Huang,
  • M. Wang,
  • K. Y. Zhu,
  • Astrid Perlade,
  • M. X. Huang

摘要

An anomalous high-strain-rate softening phenomenon was demonstrated in a high-strength quenching and partitioning (Q&P) steel. It was found that the high-strain-rate softening in the Q&P steel is caused by the intrinsic carbon-dislocation interaction, rather than transformation induced plasticity effect, dislocation density difference, or adiabatic heating. The key mechanism is ascribed to the disappeared Cottrell drag force during high-strain-rate deformation, which originates from carbon-dislocation interaction and is present during quasi-static deformation.