Intoduction

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Crystal geometry

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Unit cell

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Classification of lattices

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Gaps in Bravais lattice list

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Symmetry - I

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Symmetry - II

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Classification of lattices on the basis of symmetry

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A symmetry based approach to Bravais lattices

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Miller indices of directions

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Miller indices for planes

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Miller indices for plane and its normal in Cubic Crystal

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Weiss Zone law and its applications

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Inter-planar spacing

Preview 15:57

Bragg's Law

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Close-packing of hard spheres

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Hexagonal Close-Packed (HCP) structure

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Lattice and motif of HCP crystals

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c/a ratio of an ideal HCP crystal

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ABCABC stacking of close-packed spheres

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Voids in close-packed structures

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Solid solutions I

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Solid solutions II

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Hume-Rothery rules

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Ordered and disordered solid solutions

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Graphene

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Structure of graphite

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Structure of diamond

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Carbon nanotubes (CNT)

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Buckminsterfullerene (C60)

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Ionic solids

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NaCl

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CsCl

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ZnS

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BCC vs CsCl

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Amorphous Solids

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Polymers

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Vinyl Polymers

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Thermoplasts and Thermosets

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Tacticity

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Copolymers

Preview 03:50

Crystallinity in Polymers

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Defects in Crystals

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Vacancies

Preview 37:59

Edge dislocation: Half plane

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Edge dislocation: Slip

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Characteristic vectors of a dislocation

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Edge, screw and mixed dislocations

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Screw dislocations

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Burgers circuit

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Elastic energy of a dislocation line

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Burgers vector: Shortest lattice translation

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Burgers vector of a dislocation is constant along the line

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(Geometrical properties of a dislocations) Dislocation cannot end abruptly in a crystal: Free surface

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Dislocation cannot end abruptly in a crystal: Grain boundaries

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Dislocation cannot end abruptly in a crystal: Dislocation nodes

Preview 09:35

Dislocation cannot end abruptly in a crystal: Dislocation loop

Preview 22:44

Dislocation motion

Preview 22:59

2D defects: Surfaces or interfaces

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Free surface or external surface of the crystal

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Stacking faults

Preview 15:30

Twin boundary

Preview 10:32

Grain boundary

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Small angle symmetric tilt boundary

Preview 15:34

Ball bearing model

Preview 02:49

Phase diagrams: Introduction

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Phases and components

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Uses of phase diagrams

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Phases present in the system

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Composition of phases present in the system

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Proportion of phases present in the system

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Microstructure evolution during solidification in isomorphous systems

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Eutectic system

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Eutectic reaction

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Eutectic, hypoeutectic and hypereutectic alloys

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Gibbs' phase rule

Preview 31:44

Fe-C phase diagram

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Eutectoid, hypoeutectoid and hypereutectoid steels

Preview 12:10

Microstructure of a hypoeutectoid steel

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Microstructure of a hypereutectoid steel

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Diffusion: Introduction

Preview 14:10

Fick's first law

Preview 27:57

Fick's second law

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Error function solution of Fick's second law

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Atomic mechanisms of diffusion

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Substitutional diffusion revisited

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Diffusion paths

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Steady and unsteady state diffusion

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Phase Transformation

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Nucleation

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Nucleation and capillary rise

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Nucleation, growth and overall transformation

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Time-temperature-transformation (TTT) diagram

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Homogeneus and heterogeneous nucleation

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Heat treatment of steels

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TTT diagram of Eutectoid Steels

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Quenching and martensite

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Austempering and bainite

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Tempering

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Residual stresses and Quench cracks

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Marquenching and martempering

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TTT diagram of hypoeutectoid and hypereutectoid steels

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TTT diagram of alloy steel

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hardenability of steels

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Glass Ceramics

Preview 06:28

Tensile test

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Plastic deformation and crystal structure

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Shape change

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Slip

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Resolved shear stress

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CRSS

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Schmid's law

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CRSS:Theory vs experiment

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Why is experimental CRSS less than theoretical CRSS

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Strengthening mechaniksms

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Dislocation density

Preview 09:35

Frank-Read source

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strain hardening

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Dislocation interaction leading to strain hardening I

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Dislocation interaction leading to strain hardening II

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Solid solution hardening

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Grain size hardening

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Age hardening I

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Age hardening II

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Metastable precipitates

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Annealing of cold-worked metals

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Recovery

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Recrystallization

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Grain Growth

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True stress and true strain

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Creep

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Effect of stress and temperature on creep

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Creep Mechanisms

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Composites

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Isostrain modulus

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Isostress modulus

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Fracture

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Ductile and Brittle Fracture

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Role of crack size

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Griffith's Criterion

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Stress Concentration

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Ductile to brittle transition

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Enhancing fracture resistance

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Toughening of glass: Tempering

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Toughening of glass: Ion-Exchange

Preview 04:53

Fatigue

Preview 12:23

Sub-Critical crack growth

Preview 05:51