RGPV Mechanical Engineering (Semester 4)
Material Science and Metallurgy
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1(a) Define crystal structures
2 M
1(b) Define covalent bonding in atoms with example.
2 M
1(c) Draw crystal structure for simple cubic, BCC, FCC and HCP structure.
3 M
Solve any one question from Q.1(d) & Q.1(e)
1(d) Explain casting method used manufacturing of metal components.
7 M
1(e) Explain types and applications of ceramic materials.
7 M

2(a) Define vacancy point defects in atomic structure.
2 M
2(b) Define Frenkel defects in crystal structure.
2 M
2(c) What do you understand by dislocations? How they are measured?
3 M
Solve any one question from Q.2(d) & Q.2(e)
2(d) Explain screw dislocations with neat diagram.
7 M
2(e) Draw and explai iron carbon equilibrium diagram.
7 M

3(a) Write Gibbs phase rule used for phase diagrams.
2 M
3(b) How phase diagram can be classified?
2 M
3(c) What information can be gathered from a phase diagram?
3 M
Solve any one question from Q.3(d) & Q.3(e)
3(d) Draw and explain phase diagram for an Isomorphous binary system.
7 M
3(e) Draw and explain iron carbon equilibrium diagram.
7 M

4(a) What is the purpose of thermal processing of metal?
2 M
4(b) What are various factors considered in heat treatment of components?
2 M
4(c) Write Induction hardening and flame hardening in short.
3 M
Solve any one question from Q.4(d) & Q.4(e)
4(d) Draw and explain TTT diagram for eutectoid steel.
7 M
4(e) Explain various types of annealing processes.
7 M

5(a) Define fatigue. In which components it is occurred.
2 M
5(b) What are Three basic requisites for occurrence of a fatigue fracture?
2 M
5(c) What is classification of plastics?
3 M
Solve any one question from Q.5(d) & Q.5(e)
5(d) Draw and explain typical creep curve.
7 M
5(e) What are composite materials? What are their constituents and how they are classified?
7 M



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