Characteristics of Dislocations

• as a dislocation moves through a lattice, it creates regions of compressive, tensile and shear stresses in the lattice.

• Atoms above an edge dislocation are squeezed together and experience compression while atoms below the dislocation are spread apart abnormally and experience tension. Shear may also occur near the dislocation

• Screw dislocations provide pure shear lattice strain only.