lattice dislocations

Why Do Grain Boundaries Act As Barriers To Dislocation Motion?

by

Why Do Grain Boundaries Act As Barriers To Dislocation Motion? Grain boundaries are usually considered as obstacles to dislocation motion (because they separate regions with different crystallographic orientations and/or because they are more disordered that the center of grains) and dislocations tend to pile-up at grain boundaries. How do grain boundaries interact with dislocations? Grain

What Is High Angle Grain Boundaries?

by

What Is High Angle Grain Boundaries? Generally, it is assumed that low-angle grain boundaries (LAGBs) are those with a misorientation less than about 15 degrees. In contrast, the misorientation of high-angle grain boundaries (HAGBs) is greater than about 15 degrees. What is low angle grain boundaries? A low-angle grain boundary is defined as the boundary.