Mechanical Metallurgy

Mechanical Fundamentals:

1. Introduction
2. Stress Strain and Elastic Constant
3. Tensor principle stress and strain - incomplete

Representation by Mohr’s circle, elasticity, stiffness and compliance tensor, Yield criteria, Plastic deformation by slip and twinning.

Dislocation theory:

1. Crystal Defect and Type of Defects
2. Deformation by Slip

source and multiplication of dislocations, stress fields around dislocations; Partial dislocations, dislocation interactions and reactions.

Strengthening mechanisms:

1.   Introduction
2.   Work/strain hardening strengthening
3.   Grain boundaries strengthening
4.   Solid - solution strengthening
5.   Precipitation strengthening / Age - hardening
6.   Dispersion strengthening

solid solution, precipitation and dispersion.

Fracture: Fracture behaviour, Griffith theory, linear elastic fracture mechanics, fracture toughness, fractography, ductile to brittle transition.

Fatigue: Cyclic stress strain behaviour - low and high cycle fatigue, crack growth.

Creep: Mechanisms of high temperature deformation and failure; creep and stress rupture, stress exponent and activation energy..