Unit 1
Basics of Materials Structure: crystal systems – space lattice – miller indices of atomic planes and directions – small problems in crystallography – crystal defects point, line and surface defects. Mechanical Behaviour of Materials: stress-strain curve – elastic deformation – characteristics of elastic deformation – atomic mechanism of elastic deformation – inelastic deformation – strain time curves – viscous deformation – plastic deformation – slip and twinning – Schmidt’s law – critical resolved shear stress – Strengthening mechanisms; work hardening – grain boundary hardening, dispersion hardening.