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MY1251 MECHANICAL BEHAVIOUR AND TESTING OF MATERIALS
1. ELASTIC AND PLASTIC BEHAVIOUR
Elastic behavior of Materials - Hook's law, Plastic behaviour: Dislocation theory - Burger’s vectors and dislocation loops, dislocations in the FCC, HCP and BCC lattice, stress fields and energies of dislocations, forces on and between dislocations, dislocation climb, intersections of dislocations, Jogs, dislocation sources, multiplication of dislocations, dislocation pile-ups, Slip and twinning.
2. TENSION AND HARDNESS TESTING
Engineering stress and engineering strain curve, true stress and true strain curve, instability in tension, effect of strain rate and temperature on flow properties, tensile specimens and testing machines. Notch tensile test, Anisotropy of tensile properties.
Brinell, Vickers, Rockwell, Rockwell superficial, Rebound, Micro hardness tests and testing machines. Hardness conversion.
3. FRACTURE AND FRACTURE MECHANICS
Types of fracture, basic mechanism of ductile and brittle fracture, Griffith’s theory of brittle fracture, Orowan’s modification. Izod and Charpy Impacts tests, Ductile to Brittle Transition Temperature (DBTT), Factors affecting DBTT, determination of DBTT.
Fracture mechanics-introduction, modes of fracture, stress intensity factor, strain energy release rate, fracture toughness and determination of KIC, introduction to COD, J integral.
4. FATIGUE BEHAVIOUR AND TESTING
Fatigue: Stress cycles, S-N curves, effect of mean stress, factors affecting fatigue, structural changes accompanying fatigue, cumulative damage, low cycle fatigue, application of fracture mechanics to fatigue crack propagation, fatigue testing machines.
5. CREEP BEHAVIOUR AND TESTING
Creep curve, stages in creep curve and explanation, structural changes during creep, creep mechanisms, metallurgical factors affecting creep, high temperature alloys, stress rupture testing, creep testing machines, Parameter methods of extrapolation.
TEXT BOOKS
1. George. E. Dieter, “Mechanical Metallurgy”, McGraw-Hill, New York, SI Edition, 1995.
2. Davis.H.E., Troxell G.E., Hauck.G.E.W., “The Testing of Engineering Materials”, McGraw-Hill, 1982.
REFERENCES
1. Wulff et al Vol. III “Mechanical Behavior of Materials”, John Wiley and Sons, New York, USA, 1983.
2. Honeycombe R.W.K., “Plastic Deformation of Materials”, Edward Arnold Publishers, 1984.
3. Suryanarayana, “Testing of Metallic Materials”, Prentice Hall India,New Delhi, 1979.
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| Author: Vidya 23 May 2008 | Member Level: Diamond Points : 2 |
useful article
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