Syllabus

Course Contents:

Basic Elasticity and Plasticity – Definition of stress and strain, stress and strain tensor, Hooke’s law, Poisson’s ratio, plane stress and plane strain condition, yield criterion: von Mises and Tresca, yield locus, flow rule.

Dislocation Mechanisms – Introduction to dislocations in crystalline materials, edge, screw and mixed dislocations, Burgers vector, slip system, cross slip and climb.

Hardness- Different types like Brinell, Rockwell, Vickers, Meyer, Knoop, etc., relationship with flow behavior.
Tensile – Engineering and true stress-strain curves, evaluation of tensile properties, tensile instability, strain hardening exponent, effect of strain-rate and temperature on flow properties.
Compression – Comparison with tension, standard test procedure, phenomenon of buckling & barreling.
Impact – Notched bar Charpy and Izod impact tests, concept of transition temperature, metallurgical factors affecting impact toughness, instrumented impact test.
Creep – Creep and stress rupture tests, mechanisms of creep deformation, deformation mechanism maps, development of high temperature alloys.
Fatigue – High cycle and low cycle fatigue, effect of mean stress on fatigue, factors affecting fatigue life, fatigue crack growth, Paris law.
Fracture and Fracture Mechanics – Brittle and ductile fracture, Griffith criterion and Orowan’s rule, energy based criterion, strain energy release rate, stress intensity factor, plastic zone, plane strain fracture toughness estimation.
Non Destructive Testing – Significance of non-destructive testing, different methods and their principles.

Understanding basic elasticity and plasticity theories of materials

Analyzing the concept of dislocations and dislocation movement

Assessing the different mechanical testing (destructive/semi-destructive) techniques

Understanding different non-destructive test techniques

1. Basic understanding of elasticity and plasticity
2. Concepts of 'Dislocations' in materials
3. Understanding of the methods of different mechanical testing of materials
4. Different non-destructive test methods and their implementation
5. Knowledge related to the estimation/calculation of different mechanical properties of materials
6. Demonstrating the reasons behind various mechanical properties through structure-property correlations.

G. E. Dieter, Mechanical Metallurgy, McGrow-Hill

R W Hertzberg, Deformation and Fracture Mechanics of Engineering Materials, John Wiley and Sons

W F Hosford, Mechanical Behaviour of Materials, Cambridge University Press

Editor: H. Kuhn and D. Medlin, ASM Handbook Volume 8: Mechanical Testing and Evaluation, ASM