Deformation and Rupture of Materials

This lecture covers the deformation and rupture of materials at low temperature, focusing on crystallographic relationships, mechanical twins, and twinning mechanisms. It discusses the creation of twins from partial dislocations, the energy considerations involved, and the critical stages of twin germination. The instructor explains the accommodation of different types of deformations, the role of dislocations in twinning, and the thermally activated mechanisms. Various mechanical twin geometries and their implications on crystal structures are also explored.