Basics, Mechanical Behavior, Failure of Materials
Introduction to Crystal Structure – Coordination number, atomic packing factor, Simple Cubic, BCC, FCC and HCP Structures, Crystal imperfections – point, line, surface and volume imperfections, Atomic Diffusion: Phenomenon, Fick’s laws of diffusion; Factors affecting diffusion.
Mechanical Behavior:
Stress-strain diagram for ductile and brittle materials ,mechanical properties in plastic range, yield strength offset yield strength, ductility, ultimate tensile strength, toughness.
Plastic deformation: of single crystal by slip and twinning.
Fracture: Type I, Type II and Type III,
Fatigue: Types of fatigue loading with examples, Mechanism of fatigue, Fatigue properties, S-N diagram, Fatigue testing. Creep: Description of the phenomenon with examples, three stages of creep, creep properties, Stress relaxation.
Solidification
Mechanism of solidification, Homogenous and Heterogeneous nucleation, crystal growth, cast metal structures. Phase Diagram I: Solid solutions Hume Rothary rule substitutional, and interstitial solid solutions, intermediate phases, Gibbs phase rule.
Phase Diagram II
Construction of equilibrium diagrams involving complete and partial solubility, lever rule. Different types invariantreactions – Eutectic, Eutectoid, Peritectic, Peritectectoid reactions etc.
Iron carbon equilibrium diagram
Description of phases, solidification of steels and cast irons, invariant reactions.
Heat treating of metals
TTT curves, continuous cooling curves, description of the following heat treatmen processes with industrial applications: annealing and its types. normalizing, hardening, tempering, martempering, austempering, hardenability, surface hardening methods like carburizing, cyaniding, nitriding, flame hardening and induction hardening, age hardening of aluminum-copper alloys.
Ferrous and non ferrous materials
Properties, Composition and uses of Grey cast iron, malleable iron, SG iron and steel Copper alloys-brasses and bronzes. Aluminum alloys-Al-Cu, Al-Si,Al-Zn alloys. Titanium alloys
Composite Materials
Definition, classification, types of matrix materials & reinforcements, fundamentals of production of FRP's and MMC's advantages and application of composites.