Explanation

The phenomenon that the rheological strength decreases when processing is continued on the basis of the deformation of the previous processing. The general work softening includes geometrical softening and physical softening. geometrical softening refers to the movement of the sample axis of single crystal during deformation, so the orientation factor of the slip system changes accordingly. When the slip system in operation changes from hard orientation to soft orientation, the flow stress of the system naturally decreases. If twinning occurs in the sliding process, twinning will also change the orientation of the action sliding system and bating. Dynamic recfystallization can also be regarded as periodic processing softening. physical softening usually refers to the phenomenon that metastable austenite induces martensitic transformation when processing below the stress induced transformation transformation temperature, resulting in the reduction of flow stress of materials.

Classification