This study investigates the effect of shear band evolution on the nucleation of Goss {110}<001> texture during the primary recrystallization of 3.24 wt% Si grain-oriented electrical steel. Nucleation at the early stage of primary recrystallization of the steel is explored both experimentally and numerically. The experimental approach involves cold rolling the steel specimens to obtain a thickness reduction ratio of 76 % and then applying heat treatment to them at 600 °C for less than 1 min. The numerical simulation employes crystal plasticity (CP) finite element model (FEM) to simulate the plastic deformation induced by the dislocation slips on predefined slip systems and non-crystallographic shear bands during cold rolling. Based on the CPFEM results, the generalized strain energy release maximization (GSERM) model is used to predict the preferential orientation probability of recrystallized nuclei for the steel by considering shear band formation. Subsequently, the microstructure evolution during the early stage of primary recrystallization of the steel is simulated using the phase field model (PFM). The developed CP model successfully predicted shear band activation and evolution in the γ-fibers centered on the {111}<112> texture component. The model also demonstrated that shear bands would be the preferred nucleation sites at the early stage of primary recrystallization because of their high stored energy. Moreover, by coupling with the GSERM model, the PFM could reproduce the nucleation of Goss grains at the beginning of primary recrystallization in shear bands.

中文翻译：

---

电工钢戈斯晶粒再结晶剪切带效应的数值模拟：晶体塑性有限元和相场模拟


本研究研究了 3.24 wt% Si 晶粒取向电工钢初次再结晶过程中剪切带演化对 Goss {110}<001> 织构形核的影响。通过实验和数值研究探讨了钢初次再结晶早期阶段的形核。实验方法包括对钢试样进行冷轧，以获得76%的厚度减少率，然后在600°C下对其进行不到1分钟的热处理。数值模拟采用晶体塑性（CP）有限元模型（FEM）来模拟冷轧过程中预定义滑移系统和非晶体剪切带上位错滑移引起的塑性变形。基于 CPFEM 结果，考虑剪切带形成，使用广义应变能释放最大化（GSERM）模型来预测钢的再结晶核择优取向概率。随后，使用相场模型（PFM）模拟钢初次再结晶早期的微观结构演变。开发的 CP 模型成功预测了以 {111}<112> 纹理成分为中心的 γ 纤维中的剪切带激活和演化。该模型还表明，剪切带因其高储存能量而成为初次再结晶早期的首选成核位点。此外，通过与 GSERM 模型耦合，PFM 可以重现剪切带中初次再结晶开始时戈斯晶粒的成核。