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

由德雷塞尔大学的R. Doherty和S. Kalinindi以及巴西圣保罗技术研究所（IPT）的F. Landgraf组成的美洲材料合作小组研究了电工钢在塑性变形过程中织构的演变。该项目的重点是在轧制和再结晶铁硅电工钢中保持理想的100纤维纹理。这种结构被认为是径向磁化的电机铁芯的理想结构。西南研究所的M. Sablik和西南德克萨斯州立大学的C. Gutierrez与巴西小组合作，对纹理钢的磁性特性进行了相关的建模。该研究在充分表征的定向凝固铁硅柱状试样的平面应变压缩过程中，逐晶粒地考察了变形微观结构的发展。沿着纤维轴施加压缩。目标是：(i)开发完全预测模型所需的见解；（ii）提供与再结晶相关的微观结构已被表征为变形函数的样品。然后，与巴西集团密切合作，将为经过科学研究的柱状晶粒铸锭开发的加工方法应用于工业上重要的双辊铸锭。最终的技术目标是改进电机用钢。此外，该项目进一步增加了与巴西集团的科学和教育互动，为两国学生增加了宝贵的教育经验。该奖项由材料研究部、国际科学与工程办公室以及数学和物理科学理事会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.