Strain Hardening

Strain hardening increases mechanical strength through plastic deformation at room temperature, which creates dislocation networks in the crystal lattice and hinders their movement.

Physical-chemical mechanism of action

Strain hardening shifts atoms in the crystal structure through mechanical stress. These shifts form networks that make it harder for atoms to slide within the lattice.

Metallurgical relevance & welding risks

Strain hardening can increase strength, which is positive in many applications. However, it can also lead to higher stress buildup and thus to crack formation, especially if the material is overstressed.

Workshop practice & procedures

To minimize strain hardening, ensure sufficient cooling time and controlled cooling for the weld. For high-strength steels, post-weld heat treatments like normalizing or tempering can be helpful.

MetallurgieSchweißtechnik