Lecture
This lecture covers topics related to plasticity, torsion tests, and deformation behavior of materials. It discusses concepts such as the elastic limit, shear planes, hardness testing techniques, and the influence of grain boundaries on material properties. The instructor explains the implications of speed sensitivity on strain, the energy dissipated during plastic deformation, and the stability criteria in material behavior. Additionally, the lecture explores the use of 3-point and 4-point bending tests, the effects of friction on deformation, and the importance of understanding the mechanical properties of materials for engineering applications.