Also called work hardening. The phenomenon that the resistance to plastic deformation (the external stress required to continue plastic deformation) increases with the increase of plastic deformation. The essence is that the resistance of dislocation movement is increasing during plastic deformation. During plastic deformation, dislocation will multiply, so the dislocation density will increase with the increase of deformation. When the dislocation density in crystal is larger, the resistance encountered by moving dislocation will be larger, and the external stress needs to be continuously increased to continue the plastic deformation. The degree of strain hardening is expressed by rate.
Fundamental of Material Science -> Structural basis of materials