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<p>The present study investigated the influence of pre-deformation on the microstructure and corrosion resistance of 304L Cu-containing austenitic stainless steel. The microstructure was analyzed using scanning electron microscopy (SEM), transmission electron microscope (TEM), electron backscattering diffraction (EBSD), and x-ray diffractometry (XRD). To reveal the quantitative relationship between microstructure and macroscopic properties of tested steel corrosion properties. As the pre-deformation increased within the 0-40% range, the yield and tensile strengths of the tested steel increased, while the total elongation after fracture decreased. Simultaneously, the dislocation density, volume fraction of deformation-induced martensite, and number of low-angle grain boundaries (LAGBs) in the tested steel increased. Moreover, the corrosion current density and polarization resistance of the investigated steel initially decreased and then increased, whereas the stress corrosion cracking (SCC) sensitivity coefficient gradually increased. At 20% pre-deformation, the tested steel showed optimal corrosion resistance, attributed to the highest Cr/Fe ratio in the passivation film. Deformation in this range had minimal impact on corrosion properties.</p>

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Effects of Pre-deformation on Microstructure and Corrosion Resistance of 304L Cu-Containing Austenitic Stainless Steel

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Lidong Zhao,
  • Ximin Zang,
  • Qihang Pang,
  • Mei Xu,
  • Weijuan Li,
  • Jinqiang Mo

摘要

The present study investigated the influence of pre-deformation on the microstructure and corrosion resistance of 304L Cu-containing austenitic stainless steel. The microstructure was analyzed using scanning electron microscopy (SEM), transmission electron microscope (TEM), electron backscattering diffraction (EBSD), and x-ray diffractometry (XRD). To reveal the quantitative relationship between microstructure and macroscopic properties of tested steel corrosion properties. As the pre-deformation increased within the 0-40% range, the yield and tensile strengths of the tested steel increased, while the total elongation after fracture decreased. Simultaneously, the dislocation density, volume fraction of deformation-induced martensite, and number of low-angle grain boundaries (LAGBs) in the tested steel increased. Moreover, the corrosion current density and polarization resistance of the investigated steel initially decreased and then increased, whereas the stress corrosion cracking (SCC) sensitivity coefficient gradually increased. At 20% pre-deformation, the tested steel showed optimal corrosion resistance, attributed to the highest Cr/Fe ratio in the passivation film. Deformation in this range had minimal impact on corrosion properties.