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<p>Pulsed current assisted forming represents an effective strategy to enhance the plasticity of metals. Electrical-assisted tensile (EAT) tests were conducted to investigate the flow stress and microstructural evolution of cold-rolled 1045 carbon steel under different voltages. The results demonstrate that the application of pulse current helps to enhance the plasticity of cold-rolled 1045 carbon steel. As the voltage increases, the yield strength and ultimate tensile strength of EAT samples decrease, while the elongation shows a tendency to first rise and then fall. The continuity of cementite lamellae is disrupted by the synergistic action of tensile stress and pulse current during the EAT process. Meanwhile, the pulse current accelerates the precipitation of cementite nanoparticles. Additionally, pulse current lowers the nucleation energy barrier for dynamic recrystallization of ferrite grains, weakens cold-rolled induced work hardening, and enhances material plasticity. The research offers theoretical guidance for optimizing the plastic forming processes of cold-rolled 1045 carbon steel.</p>

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Deformation Behavior and Microstructure Evolution of Cold-Rolled 1045 Carbon Steel under Electrical-Assisted Tensile Conditions

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Zhengning Li,
  • Mingke Wang,
  • Yang Jiang,
  • Peiqing La,
  • Qian Ma,
  • Xiaohu Qiang,
  • Shunhua Wang

摘要

Pulsed current assisted forming represents an effective strategy to enhance the plasticity of metals. Electrical-assisted tensile (EAT) tests were conducted to investigate the flow stress and microstructural evolution of cold-rolled 1045 carbon steel under different voltages. The results demonstrate that the application of pulse current helps to enhance the plasticity of cold-rolled 1045 carbon steel. As the voltage increases, the yield strength and ultimate tensile strength of EAT samples decrease, while the elongation shows a tendency to first rise and then fall. The continuity of cementite lamellae is disrupted by the synergistic action of tensile stress and pulse current during the EAT process. Meanwhile, the pulse current accelerates the precipitation of cementite nanoparticles. Additionally, pulse current lowers the nucleation energy barrier for dynamic recrystallization of ferrite grains, weakens cold-rolled induced work hardening, and enhances material plasticity. The research offers theoretical guidance for optimizing the plastic forming processes of cold-rolled 1045 carbon steel.