Syllabus

Module 1: Dislocation Theory
Theoretical shear strength, Defects in crystalline materials, Types of dislocation, Dislocation motion, Cross slip and climb of dislocations, Burgers vector, Peierls-Nabarro Stress, Deformation by slip, Dislocation reaction, Stacking faults, Dislocation locks, Sources of Dislocations, Critical resolved shear stress

Module 2: Fracture Mechanics
Theoretical Cohesive Strength, Fracture: Stress based Approach, Energy based Approach, Griffith Criteria, Stress Distribution ahead of Crack tip, Stress Intensity Factor, Fracture Toughness, Plane Stress and Plane Strain, Notch Effect, Crack Tip Plastic Zone, Influence of Thickness on Fracture Toughness, Plane Strain Fracture Toughness (K?c) Testing, Classification of Fracture, Brittle and Ductile Fracture Mechanism

Module 3: Fatigue
Stress Parameters, S-N curve, Effect of mean stress, Effect of R ratio, Variable Amplitude Loading, Miner's Law. Fatigue strain life approach, High and Low cycle fatigue, Cofin-Manson’s equation, Stress life approach, Basquin’s equation, Fractographic Aspect of fatigue loading

Module 4: Strengthening mechanism
Strengthening from grain boundaries, Low angle grain boundaries, Strain hardening, Bauschinger’s effect, Cottrell atmosphere and Yield Point Phenomenon, Solid solution strengthening, Precipitation hardening, and Dispersion strengthening

To understand crystal imperfections present in metallic systems

To examine the fundamentals of fracture and fracture mechanics in real-world applications.

To study material response under cyclic loading.

To study different strengthening mechanisms in materials.

To develop fundamental concepts of dislocations in crystal systems.

To evaluate the effect of defects on the mechanical behavior of crystalline materials

To understand the fundamental principles of fracture mechanics.

To apply fracture mechanics concepts to improve failure resistance in engineering components.

To investigate the effect of cyclic loading on material behavior.

To understand the various strengthening mechanisms and their influence on the properties of materials.

Dieter GE, Mechanical Metallurgy, USA. New York: McGraw-Hill, , SBN-0-07-084187-X

Derek Hull and D.J. Bacon, Introduction to Dislocations , Elsevier/Butterworth-Heinemann

Callister Jr, W. D., & Rethwisch, D. G, Materials science and engineering: an introduction, John wiley & sons. , ISBN-13: 9781119321590