The relationship between crystallographic analysis and microscopic behavior of fatigue crack propagation in rolled iron film using EBSD (electron backscatter diffraction) method

摘要

In this study, in order to discuss the effect of rolling texture on fatigue crack propagation properties of commercially-pure iron films with the thickness of 100μm, the films were annealed at 873K and I 173K after rolling, and the two types of specimen that rolling direction was parallel and perpendicular to loading direction were prepared in film fatigue testing. The crystallographic information of rolling textures in annealed iron films was analyzed using EBSD (Electron Backscatter Diffraction) system. As a result, the anisotropy of rolling texture remained after annealing, and there was a difference between the two types of specimen in crack propagation behavior and crack observation on the specimen surface. The reason was probably that the slip system of the rolling texture in iron film materials is different in accordance with the relationship between rolling direction and crack propagation direction.