Structure of Materials. Instructor: Dr. Anandh Subramaniam, Department of Materials Science and Engineering, IIT Kanpur. Atomic arrangement in crystalline solids, defects in crystalline solids, microstructure evolution, quantification of microstructures. Topics includes: bonding in materials; geometry of crystals: symmetry, lattices; Miller indices; crystal structures; defects in crystals; diffusion; phase diagrams; phase transformations; and effect of microstructure on properties.
(from nptel.ac.in)
Lecture 26 - Defects in Crystals: Dislocations (cont.)
Dislocation climb, cross-slip of screw dislocations. Where can a dislocation line end? Positive and negative dislocations. Dislocations (Energy, dissociation, stress fields, dissociation, Interaction). Dislocations in CCP crystals (Shockley partial dislocations), dislocation loops and Frank partial dislocations. Dislocations in BCC crystals. Dislocations in ionic crystals. Formation of dislocations and typical values for dislocation densities. Burgers vectors for dislocations in cubic crystals. Slip systems in FCC, BCC and HCP crystal structures. Jogs and Kinks in dislocations. Dislocation-dislocation interactions (edge-edge, edge-screw, screw-screw).