This class willcover the principles of dislocation theory from a physical metallurgyperspective, providing a fundamental understanding of the relations between thestrength and of crystalline solids and distributions of defects. We will reviewthe concept of dislocations, defining terminology used, and providing anoverview of important concepts (e.g. linear elasticity, stress-strainrelations, and stress transformations) for theory development. We will developthe theory of dislocation plasticity through derived stress-strain fields,associated self-energies, and the induced forces on dislocations due to internaland externally applied stresses. Dislocation structure will be discussed,including core models, stacking faults, and dislocation arrays (including grainboundary descriptions). Mechanisms of dislocation multiplication andstrengthening will be covered along with general principles of creep and strainrate sensitivity. Final topics will include non-FCC dislocations, emphasizingthe differences in structure and corresponding implications on dislocationmobility and macroscopic mechanical behavior; and dislocations in finitevolumes. |
