I have come across the definition somewhere,"Work hardening, also known as strain hardening, is the strengthening of a metal or polymer by plastic deformation. This strengthening occurs because of dislocation movements and dislocation generation within the crystal structure of the material."Now I have been told by my professor that strain hardening and work hardening are different.I would like to have a detailed answer on this.
There is stress and strain hardening. Stress hardening is done under compression. Strain hardening occurs under tension and is ultimately destructive. Strain hardening occurs due to repetitive bending that induces material fractures to increase whereas stress hardening is compression of material to increase surface contact between molecular or crystalline structures of the material to increase internal structural friction.
Stress hardening is how steel manufacture is used to increase hardness of material after annealing.