A dislocation is characterized by its dislocation-displacement vector, known as the Burgers vector, [b.
The Burgers vector is the vector required to make the Burgers circuit equivalent to the reference circuit (see Fig.
The shear vectors, or Burgers vectors, were chosen from the shortest lattice vectors in order to minimize the elastic energy of the dislocation associated with the slip system, which is proportional to the square of the Burgers vector, the so-called Frank criteria.
The value of the GSF energy was obtained by shearing half of a perfect crystal over the other half along the Burgers vector in a slip plane.
Equal numbers of dislocations with positive and negative Burgers vectors are present in each sub-area: the net Burgers vector equals zero.
where L is the correlation length, b is the length of the Burgers vector b, [sigma] equals |sin[psi]| where [psi] is the angle between the line vector l of the dislocation and the vector g, where g is the diffraction vector at which Bragg's law holds exactly for the reflection considered (length g; for cubic material it holds: g = ([h.
Therefore small, Volterra type loops should form first at "soft" spots throughout the glass, with a constant Burgers vector b(M).
In the region of yield, in order to develop the loop further through the next regions M[prime], additional dislocation loops of Burgers vector [Delta]b = b(M[prime]) - b(M) have to be added to the main loop b(M), where the local Burgers vector b(M[prime]) fitting molecular arrangements in zone M[prime] differ too much from the initial shift b(M).
A dislocation is characterized by its dislocation vector, known as the Burgers vector, [b.
As shown in , the screw dislocation Burgers vector is equal to the wavelength of the screw dislocation
Investigations performed on monocrystals have proved that recovery takes places by means of annihilation of dislocations with opposite Burgers vectors
, tightening of dislocations loops, ordering of dislocation configurations, as well as by means of formation of subboundaries and their motions .
Dislocation lines in three dimensions, intersecting the surface, would show up in the surface as points with associated Burgers vectors