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<p>This study investigates the microstructural and textural evolution of C35 ferritic–pearlitic steel subjected to cold drawing at different reduction levels (0%, 53.5%, 79.3%, and 88.1%). Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD), and X-ray Diffraction (XRD) were employed to examine morphological changes, grain refinement, lattice strain, and crystallographic reorientation. The initially isotropic microstructure progressively transforms into a highly elongated and refined structure, accompanied by the development of a strong &lt; 110 &gt; fiber texture along the drawing direction, typical of BCC steels. Kernel Average Misorientation (KAM) analysis reveals increased dislocation density and strain-induced internal stresses, while XRD peak broadening and interplanar spacing contraction indicate lattice distortion. These microstructural changes significantly enhance mechanical strength: tensile strength rises from 1120 to 1720&#xa0;MPa and yield strength exceeds 2000&#xa0;MPa. However, ductility decreases from 35% to about 7%, while microhardness increases from 315 to ~ 625 HV.</p>

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Cold Deformation-Induced Microstructural Changes and Texture Development in Ferritic–pearlitic Steel

  • 期刊论文

  • 发表日期：

    2026年4月6日

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  • Mohamed Chaouki Nebbar,
  • Imane Benelmir

摘要

This study investigates the microstructural and textural evolution of C35 ferritic–pearlitic steel subjected to cold drawing at different reduction levels (0%, 53.5%, 79.3%, and 88.1%). Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD), and X-ray Diffraction (XRD) were employed to examine morphological changes, grain refinement, lattice strain, and crystallographic reorientation. The initially isotropic microstructure progressively transforms into a highly elongated and refined structure, accompanied by the development of a strong < 110 > fiber texture along the drawing direction, typical of BCC steels. Kernel Average Misorientation (KAM) analysis reveals increased dislocation density and strain-induced internal stresses, while XRD peak broadening and interplanar spacing contraction indicate lattice distortion. These microstructural changes significantly enhance mechanical strength: tensile strength rises from 1120 to 1720 MPa and yield strength exceeds 2000 MPa. However, ductility decreases from 35% to about 7%, while microhardness increases from 315 to ~ 625 HV.