ABSTRACT
The purpose of this chapter is to describe the mechanical behavior of materials under elastic and plastic deformation modes when subjected to mechanical loading. The basic mechanisms involved for plastic deformation of metals are also discussed in this chapter. This chapter presents the basic geometric and mathematical relationships for deformation behavior of materials. The mechanical properties of materials depend on the deformation mechanisms. Concept of dislocation theory with respect to plastic deformation of bcc, fcc, and hcp crystal structures are explained in detail. The twinning process and it effects are discussed in this chapter. This chapter also discusses about the macroscopic plasticity, grain boundary engineering, and grain misorientation. Overall, this chapter presents the deformation modes along with mechanical and physical properties of single-crystal and polycrystalline materials during deformation.
