Material Science & Metallurgy
MEC-208
Structure of metal: Crystal structure (BCC, FCC and HCP), Packing factor and density calculation, miller indices, imperfections in solids. Diffusion: Diffusion mechanisms, steady state and non‐steady state diffusion, factors affecting diffusion. Deformation: Slip, twinning, critical resolved shear stress, effect of cold working and hot working on mechanical properties, principles of recovery, re‐crystallization and grain growth.
Fracture: Types of fracture‐ ductile and brittle, ductile to brittle transition temperature (DBTT), Fatigue‐ Endurance limit, S‐N Curve, factors affecting fatigue. Creep: Mechanism of creep, creep curve, basic consideration in the selection of material for high temperature service. Equilibrium diagram: solids solutions and alloys, Gibbs phase rule, unary and binary eutectic phase diagram, lever rule, Iron‐ Iron carbide Phase diagram, TTT‐diagram, Effect of alloying elements on TTT diagram.
Heat Treatment: Principles and purpose of heat treatment of plain carbon steels, annealing, normalizing, hardening, tempering, quenching, austempering, martempering, case hardening processes – carburizing, nitriding, cyaniding, induction and flame hardening, Hardenability: determination of hardenability, Jominy end quench test. Materials: Types of Plain carbon steels, effect of alloying elements on steel, Cast iron‐white, grey, malleable and nodular cast iron, properties and application of cast iron, properties and uses of high speed steel, stainless steel, spring steel, Non‐ferrous materials.
Corrosion: Types of corrosion, mechanism of corrosion, preventions against corrosion. Introduction to composite materials‐ Classification, Properties and applications of composite materials. Surface Coatings: Introduction to metallic coating and coating methods.