Lecture
This lecture covers the mechanical properties of materials, focusing on toughness and resilience. It explains the behavior of materials under different stresses, such as traction and compression, and how they respond to crack propagation. The importance of hardness tests in characterizing material resistance is discussed, along with the concept of toughness as a measure of a material's ability to resist crack propagation. The lecture also delves into the brittle-ductile transition in materials like steels, highlighting the factors influencing their behavior at different temperatures. Practical tests, such as tensile and impact bending tests, are used to illustrate these concepts.