Abstract Magnetic Barkhausen noise (MBN) signals were measured on a non-oriented electrical steel through all the thermomechanical processing stages, i.e. hot rolling, hot band annealing, cold rolling and final annealing. The temperature of the final annealing was varied from 600 °C to 750 °C so that the steel consisted of partially or completely recrystallized microstructures and different levels of residual stresses. The angular MBNrms (root mean square) values were compared to the texture factors in the same directions, the latter being calculated from the crystallographic texture measured by electron backscatter diffraction (EBSD). It was found that, in the cold-rolled, hot-rolled and completely recrystallized steels, the angular MBNrms followed a cosine function with respect to the angle of magnetization, while in partially recrystallized state such a relation does not exist. After cold rolling, the maximum MBNrms was observed in the rolling direction (RD) and the minimum MBNrms was in the transverse direction (TD), which was inconsistent with the magnetocrystalline anisotropy as indicated by the texture factor. After hot rolling, the maximum and minimum MBNrms values were observed in the TD and RD, respectively, exactly opposite to the cold-rolled state. If the steel was completely recrystallized, the maximum MBNrms was normally observed at a direction that was 15–30° from the minimum texture factor. If the steel was partially recrystallized, both the magnetocrystalline anisotropy of the material and the residual stress contributed to the angular MBNrms, which resulted in the deviation of the relationship from a cosine function. The relative strength of the two factors determined which factor would dominate the overall magnetic anisotropy.

中文翻译：

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用磁性巴克豪森噪声表征无取向电工钢的局部各向异性

摘要 在无取向电工钢的所有热机械加工阶段（即热轧、热轧带退火、冷轧和最终退火）上测量了磁巴克豪森噪声（MBN）信号。最终退火的温度从 600 °C 到 750 °C 不等，因此钢由部分或完全再结晶的微观结构和不同水平的残余应力组成。将角 MBNrms（均方根）值与相同方向的纹理因子进行比较，后者是根据电子背散射衍射 (EBSD) 测量的晶体纹理计算的。结果表明，在冷轧、热轧和完全再结晶钢中，角 MBNrms 与磁化角呈余弦函数关系，而在部分再结晶状态下，这种关系不存在。冷轧后，在轧制方向 (RD) 观察到最大 MBNrms，在横向 (TD) 观察到最小 MBNrms，这与织构因子表明的磁晶各向异性不一致。热轧后，分别在 TD 和 RD 观察到最大和最小 MBNrms 值，与冷轧状态完全相反。如果钢完全再结晶，通常在与最小织构因子成 15-30° 的方向上观察到最大 MBNrms。如果钢部分再结晶，材料的磁晶各向异性和残余应力都对角 MBNrms 有贡献，导致该关系偏离余弦函数。