Plastic deformation and subsequent heating have a significant impact on the structure and properties of metal materials. Understanding the nature of plastic deformation, plastic deformation and changes in structure during heating will help to develop the performance potential of metals and correctly determine the processing technology.
Plastic deformation and subsequent heating have a significant impact on the structure and properties of metal materials. Understanding the nature of plastic deformation, plastic deformation and changes in structure during heating will help to develop the performance potential of metals and correctly determine the processing technology.
1. Plastic deformation of single crystal metal
After the single crystal is stressed, the external force is on any crystal plane
can be decomposed into normal stress and shear stress. Normal stress can only cause elastic deformation and cleavage fracture. Only under the action of shear stress can metal crystals produce plastic deformation.
Forms of plastic deformation: slip and twinning. Metals often undergo plastic deformation by sliding.
·—) slip
Slip refers to the phenomenon that a part of a crystal undergoes a sliding displacement relative to another part along a certain crystal plane and direction.
