Engineering Materials and Metallurgy

Engineering Materials and Metallurgy is the study of engineering materials and the processes that improve their properties. Materials are broadly classified into metals, ceramics, polymers, and composites. Metals are further divided into ferrous (iron-based) and non-ferrous types like aluminum and copper. The internal structure of metals is crystalline, with common crystal structures such as BCC, FCC, and HCP. The behavior of materials under different loads is defined by their mechanical properties such as strength, hardness, ductility, toughness, and elasticity. Heat treatment processes like annealing, normalizing, hardening, and tempering are used to modify these properties. Alloys, which are mixtures of metals, are made to enhance material performance - steel being the most common alloy of iron and carbon. Phase diagrams help in understanding the changes in phases of metals with temperature and composition. Corrosion is the gradual deterioration of metals due to chemical reactions, and it can be prevented by painting, plating, or cathodic protection. Powder metallurgy is a modern technique of producing metal parts using metal powders.