Course Details
Subject {L-T-P / C} : MM6211 : Mechanical Behaviour of Materials { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Dr. Arnab Sarkar
Syllabus
Dislocation Theory: Introduction, dislocation reaction, cross slip and climb of dislocations, Dislocation sources and dislocation multiplication, Dislocation pile ups. Tensile Behaviours of Metals: True stress-true strain curve, Strain hardening coefficient, Instability in tension, Effect of strain rate and temperature on flow properties. Fracture: Griffith’s theory of brittle fracture, Mechanism of brittle and ductile fracture, Fractographic aspects of fracture, Notch effects. Impact Behaviour: Notch bar impact test, Transition temperature phenomenon, InstrumentedChapry test. Fracture Mechanics: Strain energy release rate, Stress intensity factor, Plan strain facture toughness, Crack-tip plastic zone, Dugdale’s plastic strip model, Fracture toughness determination with elastic plastic analysis (JIC), Design approach. Fatigue: Micromechanisms of crack initiation and growth, Stress and strain approaches of fatigue, Fracture mechanics approach, Fatigue crack growth, Life prediction. Creep: Creep curves, Mechanisms of creep, Stress rapture test, Life prediction, High temperature alloys. Environmental Assisted Cracking: Stress corrosion cracking, Hydrogen embrittlement, Corrosion fatigue.
Course Objectives
- To know about crystal imperfection and their role in mechanical deformation
- To get an idea about different aspects of Fracture Mechanics
- To study different mechanical deformation phenomena
- To learn about the environment assisted failure mechanisms
Course Outcomes
To understand mechanical testing and fracture behaviour
Essential Reading
- G.E. Dieter, Mechanical Metallurgy, McGraw – Hill Publication (1988)
- R.W. Hertzberg, Deformation and Fracture Mechanics of Engineering Materials, John Wiley & Sons Pub.
Supplementary Reading
- R E Reed, Physical Metallurgy Principals, Hill Litton Education Publication (2004)
- W. Soboyejo, Mechanical Properties of Engineering Materials, Marcel Dekker Publication (2003)
Journal and Conferences
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