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Course11310408140 lectures

Defects in Crystalline Solids (Part - I)

Prof. Shashank Shekhar · IIT Kanpur

Start with lecture 1 At NPTEL

About

At the end of the course, the student should be able to -Have a broad understanding of defects in materials and their role in determining properties of materials

-Have a thorough understanding of the structure of dislocations in various crystals and their elastic fields

-Have an overview of plastic deformation mechanisms and the role of dislocations in plasticity, fracture, fatigue and creep

Intended audience: Undergraduate Students and first year graduate students of following discipline: Materials Engineering, Mechanical Engineering, Metallurgical Engineering, Industrial Engineering, Electrical Engineering

Prerequisites: Under graduate level mathematics, thermodynamics

Lectures

Week 1

  1. Lecture 01: Introduction to Defects YouTube
  2. Lecture 02: Equilibrium Points Defects YouTube
  3. Lecture 03: Energy of Vacancy Formation YouTube
  4. Lecture 04: Vacancy Concentration Measurement Techniques YouTube
  5. Lecture 05: Self-interstitial Defects+Frenkel Defects YouTube

Week 2

  1. Lecture 06: Schottky Defects+Extrinsic Defects YouTube
  2. Lecture 07: Interstitial in Iron YouTube
  3. Lecture 08: Defects Reaction+Kroger-Vink Notation YouTube
  4. Lecture 09: Defects Reaction and its Thermodynamics YouTube
  5. Lecture 10: Equilibrium Concentration using Defects Reaction YouTube

Week 3

  1. Lecture 11: Examples on Defects Reaction YouTube
  2. Lecture 12: Diffusion(Interstitial Diffusion) YouTube
  3. Lecture 13: Non-Steady State Diffusion YouTube
  4. Lecture 14: Self-diffusion+Examples YouTube
  5. Lecture 15: Diffusion in Substitutional Alloys+Diffusion along Defects YouTube

Week 4

  1. Lecture 16: History of Dislocations YouTube
  2. Lecture 17: Volterra Model+Structure of Dislocation+Burger Vectors YouTube
  3. Lecture 18: Characteristics of Dislocations YouTube
  4. Lecture 19: Mixed Dislocations+Dislocation Loops YouTube
  5. Lecture 20: Elastic Continuum Model+Strain field for Screw Dislocations YouTube

Week 5

  1. Lecture 21: Stress and Strain Fields YouTube
  2. Lecture 22: Stress State around Edge Dislocations+Elastic Energy of Dislocations YouTube
  3. Lecture 23: Glide Forces on Dislocations+Line Tension on Dislocations YouTube
  4. Lecture 24: Climb Forces on Dislocations+Interaction Between Dislocations YouTube
  5. Lecture 25: Image Forces on Dislocations YouTube

Week 6

  1. Lecture 26: Resistance to Dislocation Motion+Peierl Nebarro Valley YouTube
  2. Lecture 27: Slip System+Examples YouTube
  3. Lecture 28: Dislocations and Slips+Examples YouTube
  4. Lecture 29: Critical resolved Shear Stress+Examples Contd... YouTube
  5. Lecture 30: Glide+Kinks YouTube

Week 7

  1. Lecture 01:Cross-slip + Climb YouTube
  2. Lecture 02: Climb + Jogs YouTube
  3. Lecture 03: Examples on Jogs +Dislocation Intersection YouTube
  4. Lecture 04: Dislocation intersection and step characteristics + Superjogs YouTube
  5. Lecture 05: Strain and strain-rate due to dislocation motion + Velocity of dislocations YouTube

Week 8

  1. Lecture 01: Observation of dislocation contd...+ Dislocation Dynamics YouTube
  2. Lecture 02: Dislocations in FCC + Partial dislocations YouTube
  3. Lecture 03: Partial dislocations contd...+ Stacking Fault YouTube
  4. Lecture 04: Thompson's Tetrahedron+Examples YouTube
  5. Lecture 05: Dislocations in BCC+Asymmetry of Slip YouTube

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT Kanpur
Department
Metallurgy and Material Science
Teacher
Prof. Shashank Shekhar
Level
Undergraduate
Language
English
Subjects
Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
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