Читать книгу The Rheology Handbook - Thomas Mezger - Страница 96

Plastic deformation occurs in cold forging processes of metals, or with other crystal-forming materials, if lattice dislocation takes place between the atomic levels or crystals [3.35] [3.36]. Below the yield point, there is elastic and reversible deformation behavior. Above the yield point, however, behavior is irreversible and inelastic and then, deformation is no more homogeneously distributed throughout the entire shear gap [3.22].