Inter-American Materials Collaboration: Investgation of Grain Scale Deformation and Recrystallization In Columnar Grained Electrical Steels with a <100> Fiber Texture

Drexel大学的R.Doherty和S.Kalinindi以及巴西圣保罗技术研究所(IPT)的F.Landgraf小组之间的这项泛美材料合作研究了电工钢在塑性变形过程中的织构演变。该项目的重点是在轧制和再结晶的Fe-Si电工钢中保持所需的垂直于板材的100纤维织构。这种纹理被认为是径向磁化的电机铁心的理想纹理。西南研究院的M.Sablik和西南得克萨斯州立大学的C.Gutierrez与巴西研究小组合作，开展了对织构钢的磁性建模的相关工作。这项研究考察了在平面应变压缩过程中，在完全表征的定向凝固的Fe-Si柱状样品中，在逐晶的基础上变形微观结构的发展。沿纤维轴施加压缩。其目标是(I)开发完全预测模型所需的洞察力和(Ii)提供与再结晶相关的微结构已被表征为变形函数的样品。这种加工方法是为经过科学研究的柱状晶锭开发的，然后与巴西集团密切合作，应用于具有重要工业意义的双辊铸轧薄板。最终的技术目标是改进电机钢。此外，该项目进一步加强了与巴西该小组的科学和教育互动，为两国学生增加了宝贵的教育经验。该奖项由材料研究部、国际科学和工程办公室以及数学和物理科学局的多学科活动办公室提供支持。

This Inter-American Materials Collaboration between the groups of R. Doherty and S. Kalinindi at Drexel University and F. Landgraf at the Institute of Technological Research (IPT) in Sao Paolo, Brazil examines the evolution of texture during plastic deformation of electrical steels. The project focuses on the retention of the desirable 100 fiber texture normal to the sheet in rolled and recrystallized Fe-Si electrical steel. This texture is known to be the ideal texture of motor cores that are radially magnetized. A related effort on the modeling of the magnetic properties of the textured steel is carried out by M. Sablik, Southwest Research Institute, and C. Gutierrez, Southwest Texas State University, in collaboration with the Brazilian group. The research examines the development of the deformation microstructure, on a grain-by-grain basis, in fully characterized, directionally solidified, Fe-Si columnar samples, during plane strain compression. The compression is applied along the fiber axis. The objectives are (i) to develop the insights required for fully predictive models and (ii) to provide samples in which the microstructure, relevant for recrystallization, has been characterized as a function of deformation. The processing method, developed for the scientifically studied columned-grained ingots, is then, in close collaboration with the Brazilian group, applied to the industrially important twin-roll cast sheets. The final technical objective is improved electrical motor steel. In addition this project increases further the scientific and education interaction with the group in Brazil, adding a valuable education experience for the students in both countries. This award is supported by the Division of Materials Research, the Office of International Science and Engineering, and the Office of Multidisciplinary Activities in the Directorate for Mathematical and Physical Sciences.