misorientation analysis

**Misorientation Analysis** is the **quantitative study of the angular relationships between adjacent grains or within a single grain** — calculating the minimum rotation angle/axis needed to bring one crystal lattice into alignment with another, revealing grain boundary character and deformation. **Key Misorientation Metrics** - **Grain-to-Grain**: The misorientation across grain boundaries (axis-angle pair). - **Kernel Average Misorientation (KAM)**: Average misorientation of each pixel with its neighbors — indicates local strain. - **Grain Reference Orientation Deviation (GROD)**: Misorientation of each pixel from the grain average — shows intragranular deformation. - **Misorientation Distribution Function (MDF)**: Statistical distribution of all boundary misorientations. **Why It Matters** - **Strain Mapping**: Local misorientations (KAM, GROD) map plastic deformation and residual stress. - **Grain Boundary Networks**: The misorientation distribution determines boundary network topology and properties. - **Recrystallization**: Misorientation gradients drive recrystallization nucleation during annealing. **Misorientation Analysis** is **measuring how grains disagree** — quantifying the angular differences between crystal orientations to understand boundaries and deformation.