NPTEL Courses
Introduction to Materials Science and Engineering
This course is designed as a first introduction to microstructure and mechanical properties of engineering materials for undergraduate engineering students. The focus will be on clear presentation of basic fundamentals of structure and defects of crystalline materials. This will then be used to understand the transformations, heat treatments and mechanical behavior of structural materials. The course will also include several classroom and laboratory demonstrations. The course will also be useful as an introduction to materials science for engineers and scientists in industry, research labs and academic institutions. (from nptel.ac.in )
Instructor
Prof. Rajesh Prasad, Department of Applied Mechanics, IIT Delhi.
Materials science
2018
Record ID
recakz8DpmMGTmfUbLecture 99 - Tempering

- Lecture 01 - Introduction
- Lecture 02 - Crystal Geometry
- Lecture 03 - Unit Cell
- Lecture 04 - Classification of Lattices
- Lecture 05 - Gaps in Bravais Lattices
- Lecture 06 - Symmetry
- Lecture 07 - Symmetry (cont.)
- Lecture 08 - Classification of Lattices on the Basis of Symmetry
- Lecture 09 - A Symmetry based Approach to Bravais Lattices
- Lecture 105 - Glass Ceramics
- Lecture 104 - Hardenability of Steels
- Lecture 101 - Marquenching and Martempering
- Lecture 10 - Miller Indices of Directions
- Lecture 107 - Plastic Deformation and Crystal Structure
- Lecture 100 - Residual Stresses and Quench Cracks
- Lecture 108 - Shape Change without Change in Crystal Structure
- Lecture 109 - Slip
- Lecture 106 - Tensile Test
- Lecture 103 - TTT Diagram of Alloy Steel
- Lecture 102 - TTT Diagram of Hypoeutectoid and Hypereutectoid Steels
- Lecture 111 - CRSS (Critical Resolved Shear Stress)
- Lecture 113 - CRSS: Theory vs Experiment
- Lecture 116 - Dislocation Density
- Lecture 119 - Dislocation Interaction Leading to Strain Hardening
- Lecture 117 - Frank-Reed Source
- Lecture 11 - Miller Indices for Planes
- Lecture 110 - Resolved Shear Stress
- Lecture 112 - Schmid's Law
- Lecture 118 - Strain Hardening
- Lecture 115 - Strengthening Mechanisms
- Lecture 114 - Why is Experimental CRSS Less Than Theoretical CRSS?
- Lecture 123 - Age Hardening
- Lecture 124 - Age Hardening (cont.)
- Lecture 126 - Annealing of Cold-Worked Metals
- Lecture 120 - Dislocation Interaction Leading to Strain Hardening (cont.)
- Lecture 129 - Grain Growth
- Lecture 122 - Grain Size Hardening
- Lecture 125 - Metastable Precipitates
- Lecture 12 - Miller Indices for a Plane and its Normal in Cubic Crystal
- Lecture 127 - Recovery
- Lecture 128 - Recrystallization
- Lecture 121 - Solid Solution Hardening
- Lecture 134 - Composites
- Lecture 131 - Creep
- Lecture 133 - Creep Mechanisms
- Lecture 138 - Ductile and Brittle Fracture
- Lecture 132 - Effect of Stress and Temperature on Creep
- Lecture 137 - Fracture
- Lecture 135 - Isostrain Modulus
- Lecture 136 - Isostress Modulus
- Lecture 139 - Role of Crack Size
- Lecture 130 - True Stress and True Strain
- Lecture 13 - Weiss Zone Law and its Applications
- Lecture 142 - Ductile to Brittle Transition
- Lecture 143 - Enhancing Fracture Resistance
- Lecture 146 - Fatigue
- Lecture 140 - Griffith's Criterion
- Lecture 14 - Interplanar Spacing
- Lecture 141 - Stress Concentration
- Lecture 147 - Subcritical Crack Growth
- Lecture 145 - Toughening of Glass: Ion-Exchange
- Lecture 144 - Toughening of Glass: Tempering
- Lecture 15 - Bragg's Law
- Lecture 16 - Close-Packing of Hard Spheres
- Lecture 17 - ABAB Stacking: Hexagonal Close-Packed (HCP) Structure
- Lecture 18 - HCP Crystal Revised: Fractional Coordinates of Atoms in the Motif
- Lecture 19 - C/A Ratio of an Ideal HCP Crystal
- Lecture 20 - ABCABC Stacking: Cubic Close-Packing (CCP)
- Lecture 21 - Voids in Close-Packed Structures
- Lecture 22 - Solid Solutions
- Lecture 23 - Solid Solutions (cont.)
- Lecture 24 - Hume-Rothery Rules
- Lecture 25 - Ordered and Disordered Solid Solutions
- Lecture 26 - Graphene
- Lecture 27 - Structure of Graphite
- Lecture 28 - Structure of Diamond
- Lecture 29 - Carbon Nanotubes (CNT)
- Lecture 30 - Buckminsterfullerene (C60)
- Lecture 31 - Ionic Solids
- Lecture 32 - NaCl
- Lecture 33 - CsCl
- Lecture 34 - ZnS
- Lecture 35 - BCC vs CsCl
- Lecture 36 - Amorphous Solids
- Lecture 37 - Polymers
- Lecture 38 - Vinyl Polymers
- Lecture 39 - Thermoplastics and Thermosets
- Lecture 40 - Tacticity
- Lecture 41 - Copolymers
- Lecture 42 - Crystallinity in Polymers
- Lecture 43 - Defects in Crystals
- Lecture 44 - Vacancies
- Lecture 45 - Edge Dislocation: Half Plane
- Lecture 46 - Edge Dislocation: Slip
- Lecture 47 - Characteristic Vectors of a Dislocation
- Lecture 48 - Edge, Screw and Mixed Dislocations
- Lecture 49 - Screw Dislocations
- Lecture 50 - Burgers Circuit
- Lecture 51 - Elastic Energy of a Dislocation Line
- Lecture 52 - Burgers Vector: Shortest Lattice Translation
- Lecture 53 - Burgers Vector of a Dislocation is Constant along the Line
- Lecture 54 - Dislocation cannot End Abruptly in a Crystal: Free Surface
- Lecture 55 - Dislocation cannot End Abruptly in a Crystal: Grain Boundaries
- Lecture 56 - Dislocation cannot End Abruptly in a Crystal: Dislocation Nodes
- Lecture 57 - Dislocation cannot End Abruptly in a Crystal: Dislocation Loop
- Lecture 58 - Dislocation Motion
- Lecture 59 - 2D Defects: Surfaces or Interfaces
- Lecture 60 - Free Surface or External Surface of a Crystal
- Lecture 61 - Stacking Faults
- Lecture 62 - Twin Boundary
- Lecture 63 - Grain Boundary
- Lecture 64 - Small Angle Symmetric Tilt Boundary
- Lecture 65 - Ball Bearing Model
- Lecture 66 - Phase Diagrams: Introduction
- Lecture 67 - Phase and Components
- Lecture 68 - Uses of Phase Diagrams
- Lecture 69 - Phases Present in the System
- Lecture 70 - Composition of Phases Present in the System
- Lecture 71 - Proportion of Phases Present in the System
- Lecture 72 - Microstructure Evolution during Solidification in Isomorphous Systems
- Lecture 73 - Eutectic System
- Lecture 74 - Eutectic Reaction
- Lecture 75 - Eutectic, Hypoeutectic and Hypereutectic Alloys
- Lecture 76 - Gibbs Phase Rule
- Lecture 77 - Fe-C Phase Diagram
- Lecture 78 - Eutectoid, Hypoeutectoid and Hypereutectoid Steels
- Lecture 79 - Microstructure of a Hypoeutectoid Steel
- Lecture 80 - Microstructure of a Hypereutectoid Steel
- Lecture 81 - Diffusion: Introduction
- Lecture 82 - Fick's First Law
- Lecture 83 - Fick's Second Law
- Lecture 84 - Error Function Solution of Fick's Second Law
- Lecture 85 - Atomic Mechanisms of Diffusion
- Lecture 86 - Substitutional Diffusion Revisited
- Lecture 87 - Diffusion Paths
- Lecture 88 - Steady and Unsteady State Diffusion
- Lecture 89 - Phase Transformations
- Lecture 90 - Nucleation
- Lecture 91 - Nucleation and Capillary Rise
- Lecture 92 - Nucleation, Growth and Overall Transformation
- Lecture 93 - TTT (Time-Temperature-Transformation) Diagram
- Lecture 94 - Homogeneous and Heterogeneous Nucleation
- Lecture 95 - Heat Treatment of Steels
- Lecture 96 - TTT Diagram of Eutectoid Steels
- Lecture 97 - Quenching and Martensite
- Lecture 98 - Austempering and Bainite