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<p>To further investigate the corrosion resistance of titanium-based composites and broaden their applications in marine environments, this study successfully fabricated 2.5&#xa0;vol.% TiBw/TA15 composites featuring a columnar network distribution of reinforcements using vacuum hot pressing sintering combined with hot extrusion. Microstructural variations across different cross-sections and corrosion behavior in a simulated marine environment (3.5&#xa0;wt.% NaCl) were examined. The results show that the reinforcements are arranged in a network within the transverse cross-section but align in parallel within the longitudinal one, where they also exhibit superior corrosion resistance. This difference arises because, during hot extrusion, the composite undergoes compressive stress perpendicular to the transverse section, resulting in finer grains and reinforcements in that section. In contrast, the longitudinal section experiences compressive stress along the same direction, leading to coarser grains and reinforcements. Consequently, for the same area, the longitudinal cross-section has a lower grain boundary density and stronger coupling effects, facilitating the faster formation of a more stable passive film, which enhances its corrosion resistance.</p>

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Research on the Corrosion Resistance Behavior of Longitudinal and Cross Sections of Cylindrical Mesh Structures Composed of 2.5 vol.% TiBw/TA15 Composite Materials

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Qingkai Meng,
  • Wei Wang,
  • Xinxing Li,
  • Yangju Feng

摘要

To further investigate the corrosion resistance of titanium-based composites and broaden their applications in marine environments, this study successfully fabricated 2.5 vol.% TiBw/TA15 composites featuring a columnar network distribution of reinforcements using vacuum hot pressing sintering combined with hot extrusion. Microstructural variations across different cross-sections and corrosion behavior in a simulated marine environment (3.5 wt.% NaCl) were examined. The results show that the reinforcements are arranged in a network within the transverse cross-section but align in parallel within the longitudinal one, where they also exhibit superior corrosion resistance. This difference arises because, during hot extrusion, the composite undergoes compressive stress perpendicular to the transverse section, resulting in finer grains and reinforcements in that section. In contrast, the longitudinal section experiences compressive stress along the same direction, leading to coarser grains and reinforcements. Consequently, for the same area, the longitudinal cross-section has a lower grain boundary density and stronger coupling effects, facilitating the faster formation of a more stable passive film, which enhances its corrosion resistance.