PPT Slide
For such a case, ? becomes so large that the dislocations are separated by one or two atomic spacing;
- the dislocation core energy becomes important and the linear elasticity does not hold.
- Therefore, the grain boundary becomes a region of severe localized disorder.
Boundaries consisting entirely of edge dislocations are called tilt boundaries, because the misorientation, as can be seen in Figure 16.3, can be described in terms of a rotation about an axis normal to the plane of the paper and contained in the plane of dislocations.