Defects in Crystalline Solids I
Defects in Crystalline Solids I. Instructor: Prof. Shashank Shekhar, Department of Materials Science and Engineering, IIT Kanpur. Crystalline materials show many properties and phenomena which are dependent on defects in the presence of defects. This course intends to explore the defects in crystalline materials and their effects on properties, primarily mechanical properties. 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; and have an overview of plastic deformation mechanisms and the role of dislocations in plasticity, fracture, fatigue and creep.
(from nptel.ac.in)
| Lecture 01 - Introduction to Defects |
| Lecture 02 - Equilibrium Points Defects |
| Lecture 03 - Energy of Vacancy Formation |
| Lecture 04 - Vacancy Concentration Measurement Techniques |
| Lecture 05 - Self-interstitial Defects, Frenkel Defects |
| Lecture 06 - Schottky Defects, Extrinsic Defects |
| Lecture 07 - Interstitials in Iron |
| Lecture 08 - Defects Reaction, Kroger-Vink Notation, Notation of Schottky Defect |
| Lecture 09 - Defects Reaction and its Thermodynamics |
| Lecture 10 - Equilibrium Concentration using Defects Reaction |
| Lecture 11 - Examples on Defect Reaction |
| Lecture 12 - Diffusion (Interstitial Diffusion) |
| Lecture 13 - Non-steady State Diffusion |
| Lecture 14 - Self Diffusion and Examples |
| Lecture 15 - Diffusion in Substitutional Alloys, Diffusion along Defects |
| Lecture 16 - History of Dislocations |
| Lecture 17 - Volterra Model, Structure of Dislocations, Burger Vectors |
| Lecture 18 - Characteristics of Dislocations |
| Lecture 19 - Mixed Dislocations, Dislocation Loops |
| Lecture 20 - Elastic Continuum Model, Strain Field for Screw Dislocations |
| Lecture 21 - Stress and Strain Fields |
| Lecture 22 - Stress State around Edge Dislocations, Elastic Energy of Dislocations |
| Lecture 23 - Glide Forces on Dislocations, Line Tension on Dislocations |
| Lecture 24 - Climb Forces on Dislocations, Interaction between Dislocations |
| Lecture 25 - Image Forces on Dislocations |
| Lecture 26 - Resistance to Dislocation Motion, Peierls Nabarro Valley |
| Lecture 27 - Slip System and Examples |
| Lecture 28 - Dislocations and Slips + Examples |
| Lecture 29 - Critical Resolved Shear Stress and Examples |
| Lecture 30 - Glide + Kinks |
| Lecture 31 - Cross Slip + Climb |
| Lecture 32 - Climb + Jogs |
| Lecture 33 - Examples on Jogs + Dislocation Intersection |
| Lecture 34 - Dislocation Intersection and Step Characteristics + Superjogs |
| Lecture 35 - Strain and Strain-rate due to Dislocation Motion + Velocity of Dislocations + Observation of Dislocations |
| Lecture 36 - Observation of Dislocations (cont.), Dislocation Dynamics |
| Lecture 37 - Dislocations in FCC Materials, Partial Dislocations |
| Lecture 38 - Partial Dislocations (cont.), Stacking Fault |
| Lecture 39 - Thompson Tetrahedron + Examples |
| Lecture 40 - Dislocations in BCC, Asymmetry of Slip |
| References |
Defects in Crystalline Solids I
Instructor: Prof. Shashank Shekhar, Department of Materials Science and Engineering, IIT Kanpur. This course intends to explore the defects in crystalline materials and their effects on properties.
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