Question

QUESTION 14 Which of the following is false for the plastic deformation on a microscopic scale? It corresponds to the net movement of large numbers of atoms in response to an applied stress. During this process, interatomic bonds are ruptured and reformed. In crystalline solids, it often involves the motion of dislocations. Stacking faults are another process for the plastic deformation.

Answer 1

Answer is 1. microscopic plastic deformation does not mean the movement of a large number of atoms to applied stress. Same can happen in the elastic material also. Here some atoms move beyond returning back to the original position. At microscopic levels, some bonds break and form again, in this way deformation move from one location to other.