Forces between Edge Dislocations

Shown is the force between edge dislocations of identical and opposite Burgers vectors as a function of their normalized distance.

The distance x between the dislocations is expressed in units of y, the distance of the glide planes.

The force changes from repulsive to attractive or vice verse for a distance x = y; i.e. if the dislocations are at an angle of 45^o relative to the glide plane.

The 45^o position is a stable equilibrium position for opposite Burgers vectors, because at this position F = 0, and dF/dx < 0.

For dislocations with identical b vectors, the stable position is at x = 0.

With frame

5.2.5 Interactions Between Dislocations