Carosi Daniele, Morri Alessandro, Ceschini Lorella, Ferraiuolo Alessandro
Department of Industrial Engineering-DIN, Metallurgy Group, Alma Mater Studiorum-Università di Bologna, 40126 Bologna, Italy.
Marcegaglia Ravenna s.p.a., Via Baiona, 141, 48123 Ravenna, Italy.
Materials (Basel). 2024 Aug 9;17(16):3969. doi: 10.3390/ma17163969.
This paper examines the relationship between the magnetization behavior and crystal lattice orientations of Fe-Si alloys intended for magnetic applications. A novel approach is introduced to assess anisotropy of the magnetic losses and first magnetization curves. This method links the magnetocrystalline anisotropy energy of single crystal structures to the textures of polycrystalline materials through a vectorial space description of the crystal unit cell, incorporating vectors for external applied field and saturation magnetization. This study provides a preliminary understanding of how texture influences magnetic loss rates and the first magnetization curves. Experimental results from Electron Back-Scattered Diffraction (EBSD) and Single-Sheet Tests (SSTs), combined with energy considerations and mathematical modeling, reveal the following key findings: (i) a higher density of cubic texture components, whether aligned or rotated relative to the rolling direction, decreases magnetic anisotropy, suggesting that optimizing cubic texture can enhance material performance; (ii) at high magnetic fields, there is no straightforward correlation between energy losses and polarization; and (iii) magnetization rates significantly impact magnetization loss rates, highlighting the importance of considering these rates in optimizing Fe-Si sheet manufacturing processes. These findings offer valuable insights for improving the manufacturing and performance of Fe-Si sheets, emphasizing the need for further exploration of texture effects on magnetic behavior.
本文研究了用于磁性应用的铁硅合金的磁化行为与晶格取向之间的关系。引入了一种新颖的方法来评估磁损耗和初次磁化曲线的各向异性。该方法通过晶体晶胞的矢量空间描述，将单晶结构的磁晶各向异性能量与多晶材料的织构联系起来，其中纳入了外施磁场和饱和磁化强度的矢量。本研究初步了解了织构如何影响磁损耗率和初次磁化曲线。电子背散射衍射（EBSD）和单片测试（SST）的实验结果，结合能量考量和数学建模，揭示了以下关键发现：（i）立方织构组分的密度越高，无论相对于轧制方向是对齐还是旋转，磁各向异性都会降低，这表明优化立方织构可以提高材料性能；（ii）在高磁场下，能量损耗与极化之间不存在直接关联；（iii）磁化率对磁化损耗率有显著影响，突出了在优化铁硅片制造工艺时考虑这些速率的重要性。这些发现为改善铁硅片的制造和性能提供了有价值的见解，强调了进一步探索织构对磁行为影响的必要性。
