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<p>This study focuses on the stamping forming process of a novel ultra-thin ferritic stainless steel, i.e. B470, for the application of hydrogen fuel cell bipolar plate (BP). The influences of key stamping process parameters, including stamping speed and friction coefficient, on the stress and strain distributions as well as thickness reduction (thinning) during forming (stamping)&#xa0;were investigated using finite element (FE) simulation via the software of Abaqus. Based on the FE simulation, a crystal plasticity model is further generated to conduct an in-depth analysis of the microscopic deformation behavior and grain orientation evolution, i.e. CP-FEM, in the selected key regions (corners) through electron backscatter diffraction (EBSD). In addition, a comparative study between the traditional elastoplastic and crystal plasticity models based on FEM is executed to reveal their effects on forming quality and microchannel structure optimization. The research results contribute to a better understanding of deformation and failure mechanisms of microchannel, and provide theoretical support and engineering guidance for the structural design and process optimization for the BPs.</p>

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Novel multiscale simulation and micromechanical plasticity analysis of stamping forming for ultra-thin super ferritic stainless steel bipolar plates

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Jian Han,
  • Jun Lan,
  • Heng Li,
  • Meiqing Meng,
  • Lisong Zhu,
  • Feijun Qu,
  • Hongyun Bi,
  • Zhixia Zhang,
  • Haifeng Yu,
  • Zhengyi Jiang

摘要

This study focuses on the stamping forming process of a novel ultra-thin ferritic stainless steel, i.e. B470, for the application of hydrogen fuel cell bipolar plate (BP). The influences of key stamping process parameters, including stamping speed and friction coefficient, on the stress and strain distributions as well as thickness reduction (thinning) during forming (stamping) were investigated using finite element (FE) simulation via the software of Abaqus. Based on the FE simulation, a crystal plasticity model is further generated to conduct an in-depth analysis of the microscopic deformation behavior and grain orientation evolution, i.e. CP-FEM, in the selected key regions (corners) through electron backscatter diffraction (EBSD). In addition, a comparative study between the traditional elastoplastic and crystal plasticity models based on FEM is executed to reveal their effects on forming quality and microchannel structure optimization. The research results contribute to a better understanding of deformation and failure mechanisms of microchannel, and provide theoretical support and engineering guidance for the structural design and process optimization for the BPs.