Fabrication of Fe-2.1 wt.% Si Alloy Sheets with Dominant Goss Texture Through Thickness

Macro- and micro-texture of Fe-2.1 wt.% Si alloy sheets were investigated and analyzed by X-ray diffraction and electron backscattered diffraction techniques. A Goss ({110}<001>) component accompanied by extremely weak γ (<111>//ND, normal direction) fiber is successfully formed through the sheet thickness after primary recrystallization and considerable grain growth. Goss grains mainly nucleate at shear bands in various deformed matrices with orientations spreading from <112>//ND to <332>//ND fibers. The formation of dominant Goss recrystallization texture through the thickness can be attributed to the suppression of the nucleation at grain boundaries of γ deformed matrices and the promotion of the nucleation at shear bands in various deformed matrices, based on optimization of the initial texture and microstructure and the applied processing parameters.

采用X射线衍射（X-ray diffraction）与电子背散射衍射（electron backscattered diffraction）技术，对Fe-2.1 wt.%硅合金板材的宏观与微观织构开展了研究与分析。经一次再结晶与显著晶粒长大过程后，板材厚度方向成功形成了高斯（Goss）织构组分（{110}<001>），并伴随极弱的γ纤维织构（<111>//ND，其中ND代表轧制法线方向（normal direction））。高斯晶粒主要在多种变形基体的剪切带处形核，这些变形基体的取向分布范围覆盖从<112>//ND到<332>//ND的纤维织构。通过优化初始织构、微观组织以及所采用的加工工艺参数，板材厚度方向主导性高斯再结晶织构的形成可归因于两点：一是抑制了γ变形基体晶界处的形核过程，二是促进了多种变形基体剪切带处的形核过程。