Elastic and plastic behaviour during tensile loading: when the material is subjected to the tensile force, initially material shows some elastic behaviour where it goes back to the original position upon removal of the force. The successive loading causes the plastic deformation where material cannot revert to the exact original position. And further loading finally causes fractures.
Actually, the regions found under tensile loading are as follows-
- Elastic region in which original size and shape will be restored after release of load.
- Region of permanent deformation but without localized necking.
- Region of permanent deformation with localized necking prior to fracture.