| Abstract Scope |
In polycrystalline materials, the movement of dislocations is a primary mechanism of deformation, often hindered by grain boundaries (GBs), which significantly alter the mechanical properties of materials. To predict deformation behaviors and material properties, researchers have focused on studying the interactions between dislocations and GBs. When a dislocation encounters a grain boundary, various phenomena may occur depending on the orientation, grain boundary structure, and loading conditions. Dislocations might pass through the GB, be absorbed by it, or merge into the GB and generate new dislocations on the opposite side. In our study, we integrated high-resolution Electron Backscatter Diffraction (EBSD) with in-situ micro-pillar direct tensile testing. This technique allows us to observe the distribution of orientation, strain, and geometrically necessary dislocations (GNDs) during deformation. This information aids in understanding how grain boundary characteristics influence dislocation reactions and deformation behavior. |