18CH44 Material Science syllabus for CH

INTRODUCTION:

Introduction to material science, Classification of engineering materials, Level of structure, Structure property relationships in materials.

CRYSTAL GEOMETRY AND STRUCTURE DETERMINATION:

Geometry of crystals – the Bravais lattices, Crystal directions and planes – the miller indices, Structure determination – X –Ray diffraction – Bragg law, The powder method.

ATOMIC STRUCTURE, CHEMICAL BONDING AND STRUCTURE OF SOLIDS:

Structure of atom, Periodic table, Ionization potential, Electron affinity and Electro-negativity, Primary and secondary bonds, variation of bonding character and properties, Covalent solids, Metals and alloys.

CRYSTAL IMPERFECTIONS:

Point Imperfections, Line imperfections – edge and screw dislocations, the Burgers vector, line energy of dislocations, Surface imperfections.

PHASE DIAGRAM AND PHASE TRANSFORMATIONS:

Phase rule, Single component systems, Binary phase diagrams, Lever rule, Typical phase diagrams for Magnesia-Alumina, Copper – Zinc, iron – carbon systems, Nucleation and growth, Solidification, Allotropic transformation.

DEFORMATION OF MATERIALS AND FRACTURE:

Elastic deformation, Plastic deformation, Creep, Visco-elastic deformation, Different types of fracture.

HEAT TREATMENT:

Annealing, normalizing, Hardening, Martempering, Austempering, Hardenability, Quenching, Tempering.

CORROSION AND ITS PREVENTION:

Direct corrosion, Electro-chemical corrosion, Galvanic cells, High temperature corrosion, Passivity, factors influencing corrosion rate, Control and prevention of corrosion-modification of corrosive environment, Inhibitors Protective coatings.

TYPICAL ENGINEERING MATERIALS:

Ferrous metals, Non ferrous metals and alloys – Aluminum and its alloys, Copper and its alloys, Lead and its alloys, Tin, Zinc and its alloys, Alloys for high temperature service, Ceramic materials – Structure of ceramics, Polymorphism, Mechanical, electrical and thermal properties of ceramic phases, Refractories, Glasses, abrasives, Plastics, fibres and elastomers, Organic protective coatings.

Course Outcomes:

On successful completion of this course students will be able to

• Capable of applying core concepts in Materials Science to solve Engineering problems
• Comprehend Importance of ceramics, polymers and composites, its types and applications
• Study crystal imperfections, its characteristics and corrosion prevention methods.
• Identify the phase transformation due to temperature in alloys and properties of metals and non-metals.
• Apply the knowledge of visco-elastic behaviour in material science and engineering.
• Categorize various heat treatment methods employed in the industry and its effect on the mechanical properties.

QUESTION PAPER PATTERN:

• The question paper will have ten questions. · Each full Question consisting of 20 marks
• There will be 2 full questions (with a maximum of four sub questions) from each module.
• Each full question will have sub questions covering all the topics under a module.
• The students will have to answer 5 full questions, selecting one full question from each module.

TEXT BOOKS:

1. Raghavan V., “Materials Science and Engineering – A First Course”, 3rdedn., Prentice Hall of India Pvt. Ltd., New Delhi, 1996

2. Hajra Choudhury S.K., “Materials Science and Processes”, Indian book distributing Co., 1982

REFERENCES:

1. Van Vlack H.L., “Elements of Material Science”, 2ndedn., Addison – Wesly Publishing Company, New York, 1964.