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MV1201 MATERIAL SCIENCE AND METALLURGY
UNIT I CRYSTAL STRUCTURES AND PHASE DIAGRAMS
Simple cubic structure, BCC, FCC, HCP, atomic packing factor coordination number, Miller – Bravais space lattice system, single crystal, poly crystal, grain, allotropy and polymorphism, Bragg’s law, simple problems, defects in crystalline solid – vacancy, interstitial and impurity defects, edge and screw dislocation, low angle grain boundaries, grain size measurement.
Solid solution, inter metallic, cooling curves, non-equilibrium cooling, phase rule, interpretation of equilibrium diagrams of Fe-Fe3C, Cu-Ni, Cu-Zn, Al-Ti, simple problems.
UNIT II DEFORMATION AND STRENGTHENING MECHANISM OF MATERIALS
Deformation by slip, twinning, dislocation move – sources, elastic and elastic behaviour, critically resolved shear stress, deformation in BCC, FCC and HCP materials, damping capacity and viscous deformation.
Strengthening from grain boundaries, solid solution stringing, fine particles, fibre, point defects, martensic strengthening, yieldpoint phenomenon – deformation hardening, annealing, preferred orientation and directional properties.
UNIT III MECHANICAL BEHAVIOUR AND TESTING OF MATERIALS
Engineering and true stress – strain curves for different materials like mild steel, alloy steel, cast iron and rubber, proof stress, upper and lower yield stress, ductility measurement, different types of testing machines, compression test, various hardness tests and impact tests, codes and standards for different tests.
Definition of fatigue, endurance limit and stress ratio S-N curves for ferrous and non-ferrous materials, stress concentration factor, fatigue failure and its prevention. Brittle ductile fracture, Griffth’s theory of brittle fracture, definition of fracture toughness. Definition of creep – curve.
UNIT IV METALS, ALLOYS AND MODERN MATERIALS
Classification and designation of ferrous and non-ferrous materials according to BIS, ASTM and unified numbering system (UNS), wrought and forged product forms, effects of alloying elements on properties of steel, carbon steel, low alloy steels, micro alloyed steel, stainless steels, tool steels and die steels, classification of cast iron, properties and their applications. Alloys of Al, Ti, Cu, Mg, Ni, Zn, and Pb – Properties and applications, bearing materials, brazing and soldering alloys.
Shape memory alloy, inter metallic materials, functionally graded materials, composite and ceramic materials, properties and their applications.
UNIT V HEAT TREATMENT
Critical temperature on heating, annealing, spheroidizing, normalizing, hardening, isothermal transformation diagrams, CCT and TTT diagrams, martensic transformation, tempering, austempering and martempering, hardenability and its testing, simple problems, surface hardening processes, industrial application of different heat treatment processes, different heat treatment furnaces and cooling medium, heat treatment of tool steels, thermo mechanical treatment, precautions and defects.
TEXT BOOKS
1. Gupta A.B., “Material Science and Engineering”, 1st Edition, Academic Scientific, Chennai, 1986.
2. Marc Andre Meyers and Krishnan Kumar Chawla, “Mechanical Behaviour of Materials”, 3rd Edition, Prentice Hall, New Delhi, 1999.
REFERENCES
1. Mills, Kathleen, Davis, Joseph. R, “Metals handbook”, Vol. 2 3, and 4, 9th Edition, ASM International, New Delhi, 1987.
2. John Vernon. B., ”Engineering Materials”, 3rd Edition, Macmillan, Chennai, 1999.
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