1. Deformation process of polycrystalline materials Deformation process of industrial material consists of three stages Elastic. which is reversible

I Introduction Silicates are compounds that mainly composed of [sio4]. It is the essential components of most rock and soil, such as quartz, feldspar, mica etc

2.5 Indices of crystal planes and directions I What's crystal planes anddirect ions? The atomic planes anddirections passing through the crystal arecalled(crystal) planes and directionsrespectively

4. Rule for elongation or reduction of R D All R.D. in the region where K1 and K2 makes an obtuse(acute) angle will increase (reduce) its length after twinning

3. 1 Basic concepts of al loys 1. Definition An alloy is the combination of metal(s) with other elements through chemical bonding. Termino logy

1. The structure of am b differs from those of either a or B 2. Its composition is variable to more or lessextension 3. Mixed bonding 4. Intermediate properties

2. Classification of materials based on structure Regularity in atom arrangement periodic or not (amorphous)

2.3 Crystal Structure and Complex Lattice | Crystal structure is the real arrangement of atom in crystals Crystal structure Space lattice Basis or structure unit

1.2 Atomic bonding Bonding forces and energies FF net force attractive force repulsive force

东南大学：《固体力学基础》课程教学课件（英文讲稿）12 Simple Dynamic Solutions for Linear Elastic Solids