What Is Strain Hardening?

After yield slip, the material must continue to strain to increase stress. At this stage, the material's ability to resist deformation is improved. This is often called the strengthening phase. This physical phenomenon is called strain hardening.

Strain hardening

Right!

After yield slip, the material must continue to strain to increase stress. At this stage, the material's ability to resist deformation is improved. This is often called the strengthening phase. This physical phenomenon is called strain hardening.

Chinese name

Strain hardening

Foreign name

strain hardening

Stress-strain curve of material tensile test

In the material's tensile and compression experiments, after the material passes through the yield stage, the ability to resist deformation is enhanced. At this time, it is necessary to increase the stress for the material to continue to deform.

(Also called cold work strain) After plastic deformation of steel at normal temperature, the internal structure will change, the grains will be stretched along the direction of maximum deformation, and the crystal lattice will be distorted, thereby improving the material's resistance to deformation. This phenomenon is called strain hardening or work hardening ^[1] .