During Elastic Deformation Is There Dislocation Movement and Why?

In other words, elastic deformation is a change in shape of a material at low stress that is recoverable after the stress is removed. ... However, the movement of dislocations allows atoms in crystal planes to slip past one another at a much lower stress levels.

What causes dislocation movement?

Dislocations can move if the atoms from one of the surrounding planes break their bonds and rebond with the atoms at the terminating edge. In effect, a half plane of atoms is moved in response to shear stress by breaking and reforming a line of bonds, one (or a few) at a time.

What occurs during elastic deformation?

Elastic deformation involves the temporary stretching or bending of bonds between atoms. For example, when bending a steel sheet, the bonds are bent or stretched only a few percent but the atoms do not slip past each other. Elastic deformation can be caused by applying shear forces or tension / compression stress.