Control and prediction of electromagnetically favourable microstructure of electrical sheet based on crystal plasticity and heat treatment

在本项目中，电机动性高效电工片材课题组第一个资助期的TP-3的研究将继续和延伸。变形电工板在单晶或少晶尺度上的电磁性能与结构-性能-关系的研究将补充现有的对最终热处理以及在晶粒度分布和织构意义上的微观组织转变的建模和表征的关注。在第一个资助期内，成功地实施了基于物理的建模方法，允许使用Level Set方法对再结晶和晶粒生长进行集成模拟。在TP 3中开展了一项关于质地和微观结构的全面表征运动，为电工板材和其他项目中的类似工作制定了这一模型定制模型。这些工作将作为第二个资助期的一部分继续进行。在这些方面的扩展中，作为该项目的一部分，将增加一个新的中心构件：晶界和晶界尺度上的变形对磁性能的影响，特别是考虑到板材的切割过程。在第一个供资期间，已表明切割条件、机械载荷和由此产生的微观结构的影响很大，但目前无法根据物理模型对切割过程进行建模。因此，在第二个资助期内，该项目的工作将包括以下结构：将在微观和宏观范围内开展关于晶界塑性的单晶和双晶研究，并与电磁特性直接相关。由此产生的结构-性质-关系和对应力状态的依赖关系将被变形过程的速率依赖性和多晶体的准原位变形的表征所补充。最后，来自这些工作包的组合洞察力将与现有模型保持一致，并集成到整个流程链的连续视图中。

In this project, the research of TP 3 of the first funding period of the research group “Efficient electrical sheet for electro mobility” will be continued and extended upon. The existing focus on the final heat treatment as well as the modelling and characterization of microstructural transformations in the sense of grain size distributions and texture will be supplemented by the study of structure-property-relationships of deformed electrical sheet with respect to its electromagnetic properties on the scale of single or oligocrystals.Within the first funding period, a physically based modelling approach was successfully implemented which allows the integrated simulation of recrystallization and grain growth using the level set method. The formulation of this model tailored model for the electrical sheet material and similar work in the other projects was enabled by a comprehensive characterization campaign with respect to texture and microstructure within TP 3. These efforts will be continued as part of a second funding period. In extension of these aspects, a new central building block is to be added as part of this project: the effect of deformation at the grain and grain boundary scale on the magnetic properties, especially considering the cutting process of the sheet. Over the course of the first funding period, it has been shown that the effect of cutting conditions, mechanical loads and the resulting microstructure is significant but at present cannot be modelled to guide the cutting process based on physical models. Within the second funding period, the work within this project will therefore be structures as follows: single and bicrystal studies on plasticity at grain boundaries at the micro and macroscale will be carried out and correlated directly with electromagnetic characterization. The resulting structure-property-relationships and dependencies on the stress state will then be supplemented by the characterization of rate dependence of the deformation processes and quasi-in-situ deformation of the polycrystal. Finally, the combined insights from these work packages will then be aligned with the existing models and integrated into the continuous view of the entire process chain.