Chapter y Plastic Deformation of Crystal Lesson twelve
Chapter Ⅳ Plastic Deformation of Crystal Lesson twelve
3 1 Introduction 1. Deformation process of polycrystalline materials Deformation process of industrial material consists of three stages Elastic, which is reversible Plastic or permant Fracture
§4.1 Introduction 1. Deformation process of polycrystalline materials Deformation process of industrial material consists of three stages: ➢ Elastic, which is reversible ➢ Plastic or permant ➢ Fracture
2. Deformation mode of crystals 2 )TwInning 3)Grain boundary sliding followed by g b. migration 4)Diffusion
2. Deformation mode of crystals 1) Slip 2) Twinning 3) Grain boundary sliding followed by g.b. migration 4) Diffusion
3. Basic feature of slip and twinning Both slip and twinning are shear processes under shear stresses, i.e. it is a translational movement of one portion of the crystal with respect to the other on a specific plane and along a specific direction
3. Basic feature of slip and twinning Both slip and twinning are shear processes under shear stresses, i.e. it is a translational movement of one portion of the crystal with respect to the other on a specific plane and along a specific direction
slip twinning
slip twinning