Material Science and Engineering 21ME33

Material Science and Engineering 21ME33

Module 1`

Structure of Materials
Introduction: Classification of materials, crystalline and non-crystalline solids, atomic bonding
Geometrical Crystallography: Symmetry elements: the operation of rotation, Proper and Improper rotation axes, Screw
axes, Glide planes
Crystal Structure: Crystal Lattice, Unit Cell, Planes and directions in a lattice, Planar Atomic Density, packing of atoms and
packing fraction, Classification and Coordination of voids, Bragg’s Law
Imperfections in Solids: Types of imperfections, Point defects: vacancies, interstitials, line defects,
2-D and 3D-defects, Concept of free volume in amorphous solids.

Module 2

Physical Metallurgy
Alloy Systems: Classification of Solid solutions, Hume- Rothery Rules
Phase Diagrams: Gibbs Phase Rule, Solubility limit, phase equilibria and Phase Diagrams: Isomorphous systems, Invariant
Binary Reactions, Lever Rule; important phase- diagrams , Iron-Carbon Diagram.
Diffusion: Diffusion-Fick’s Laws, Role of imperfections in diffusion.

Module 3

Nucleation and growth: Introduction to homogeneous and heterogeneous nucleation, critical radius for nucleation.
Plastic Deformation: Slip, Twinning; Recovery- Recrystallization-Grain Growth, Introduction to Strengthening
mechanisms. Lever rule and phase diagram.
Heat treatment: Annealing, Normalizing, hardening, Tempering, Nitriding, Cyaniding, Induction Hardening and Flame
Hardening, Recent advances in heat treat technology. TTT diagram, microstructural effects brought about by these
processes and their influence on mechanical properties.

Module 4

Surface coating technologies: Introduction, coating materials, coating technologies, types of coating, advantages and
disadvantages of surface coating.
Powder metallurgy: Introduction, Powder Production Techniques: Different Mechanical and Chemical methods,
Characterization of powders (Particle Size & Shape Distribution), Powder Shaping: Particle Packing Modifications,
Lubricants & Binders, Powder Compaction & Process, Sintering and Application of Powder Metallurgy.

Module 5

Materials Selection
The need for material selection in design, the evolution of Engineering materials.
The Design Process and Materials Data: Types of design, design tools and materials data, processes of obtaining
materials data, materials databases
Engineering Materials and Their Properties: The classes of engineering materials and their structure, material properties:
mechanical properties, functional properties.
Material Selection Charts: Selection criteria for materials, material property Charts, deriving property limits and material
indices, materials indices which include shape.

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