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<p>A dislocation density-based crystal plasticity method is used to investigate the evolution of cold-rolled texture in grain-oriented silicon steel with ultra-large grains. In polycrystalline materials, if the initial texture deviation from Goss is within 10<sup>°</sup>, the polycrystalline deformation is uniform, and a strong {111} &lt; 112 &gt; texture appears after a 66.7% thickness reduction. Conversely, if the deviation angle is over 10<sup>°</sup>, the polycrystalline deformation is heterogeneous, and the cold-rolled texture deviates from the {111} &lt; 112 &gt; texture. For individual grains, after a 66.7% thickness reduction, the exact Goss texture changes to the {111} &lt; 112 &gt; texture, and the neighbor grain texture influence is negligible; the grain with initial orientation (0<sup>°</sup>, 40<sup>°</sup>, 0<sup>°</sup>), which is a 5<sup>°</sup> deviated Goss orientation, rotates to the deviated {111} &lt; 112 &gt; orientation, the neighbor grain orientation has a significant effect on cold-rolled texture, and the larger the deviated Goss angle of the initial neighbor grains, the greater the difference in deformation capacity between a deviated Goss grain and its neighboring grains. The cold-rolled texture rotates along the [1-10] axis toward the {111} &lt; 112 &gt; near orientation when the neighbor grain Goss deviation angle is within 10<sup>°</sup>. It may also rotate slightly along the ND axis. When the neighbor grain Goss deviation angle is over 10<sup>°</sup>, the heterogeneity-induced deviated Goss grain rotates in two paths during the early deformation stage: I) rotation along the [1-10] axis toward the {111} &lt; 112 &gt; orientation and II) rotation along the ND axis toward the {110} &lt; 229 &gt; orientation, and in the following thickness reduction, the texture rotates along the [1-10] axis, and the orientation deviation along the ND axis is retained; the initial orientation (10<sup>°</sup>, 53<sup>°</sup>, 0<sup>°</sup>) which deviated from Goss orientation 12.8°, rotates to the {223} &lt; 124 &gt; and {122} &lt; 144 &gt; orientations. It seriously deviates from the ideal {111} &lt; 112 &gt; orientation. The simulation result is consistent with the quasi-in situ experimental result.</p>

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Crystal Plasticity Modeling of Initial and Neighbor Grain Orientation Effects on Cold-Rolling Texture of Ultra-Large Grain-Oriented Silicon Steel

  • 期刊论文

  • 发表日期：

    2025年12月2日

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  • Yalong Luo,
  • Haochen Ding,
  • Luyang Miao,
  • Chi Zhang,
  • Liwen zhang,
  • Chongxiang Yue

摘要

A dislocation density-based crystal plasticity method is used to investigate the evolution of cold-rolled texture in grain-oriented silicon steel with ultra-large grains. In polycrystalline materials, if the initial texture deviation from Goss is within 10°, the polycrystalline deformation is uniform, and a strong {111} < 112 > texture appears after a 66.7% thickness reduction. Conversely, if the deviation angle is over 10°, the polycrystalline deformation is heterogeneous, and the cold-rolled texture deviates from the {111} < 112 > texture. For individual grains, after a 66.7% thickness reduction, the exact Goss texture changes to the {111} < 112 > texture, and the neighbor grain texture influence is negligible; the grain with initial orientation (0°, 40°, 0°), which is a 5° deviated Goss orientation, rotates to the deviated {111} < 112 > orientation, the neighbor grain orientation has a significant effect on cold-rolled texture, and the larger the deviated Goss angle of the initial neighbor grains, the greater the difference in deformation capacity between a deviated Goss grain and its neighboring grains. The cold-rolled texture rotates along the [1-10] axis toward the {111} < 112 > near orientation when the neighbor grain Goss deviation angle is within 10°. It may also rotate slightly along the ND axis. When the neighbor grain Goss deviation angle is over 10°, the heterogeneity-induced deviated Goss grain rotates in two paths during the early deformation stage: I) rotation along the [1-10] axis toward the {111} < 112 > orientation and II) rotation along the ND axis toward the {110} < 229 > orientation, and in the following thickness reduction, the texture rotates along the [1-10] axis, and the orientation deviation along the ND axis is retained; the initial orientation (10°, 53°, 0°) which deviated from Goss orientation 12.8°, rotates to the {223} < 124 > and {122} < 144 > orientations. It seriously deviates from the ideal {111} < 112 > orientation. The simulation result is consistent with the quasi-in situ experimental result.