Kurukshetra University 2011-4th Sem B.E Mechanical Engineering Material science b tech - Question Paper
Roll No.........................................Total No. of Pages : 2
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Material Science (w.e.f. 2006 onwards)
Paper: ME-204E
[Maximum Marks : 100
Time: Three Hours]
Note : (1) Attempt any five questions selecting at least
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" - " one question from each unit.
(2) All questions carry equal marks.
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1. (a) Find out Packing Fraction and Coordination number for
, following:
I
(i) Primitive unit cell structure.
(ii) BCC structure.
(iii) FCC structure. 6
(b) Write down a short note on Ciystallography. 6
(c) Copper has FCC structure *and an atomic radius of 1.278 A. Calculate its density.
Atomic wt. of Cu = 63.5 g/mol
Avogadro number = 6 x 1023. 8
2. Explain the following with neat diagrams :
(a) Point and Line defects. 6
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(b) Edge and Screw dislocations. 7
(c) Slip and Slip planes. 7
UNIT-n
3. (a) Explain the TTT curve with its main applications. 8
(b) Derive the phase rule F = C-P+2? symbols having their usual meaning. 6
(c) Differentiate between Eutectic and Eutectoid Systems with same examples. 6
8452 1 (Contd.)
4. (a) What is meant by Heat Treatment ? Also mention its main
objectives. 8
(b) Explain the following terms in brief:
(i) Annealing
(ii) Tempering
(iii) Hardening
(iv) rvanidinpi -----12
UNIT-IH
5. (a) Explain the mechanism of Fatigue. Also discuss the factors
affecting the fatigue. , 12
(b) Differentiate clearly between Brittle and Ductile Fracture with
the help of suitable examples. 8
6. (a) Explain Bauschinger effect in detail with same examples. 10
(b) What is the process of plastic deformation ? Also discuss the
deformation by Twining effect. __,10.
UNIT-IV
7. (a) Discuss dry and wet corrosion. Also explain various methods
of corrosion prevention. 10
(b) What are Ceramics ? Explain in brief. Also discuss their properties and forming techniques. 10
8. (a) Draw a typical creep curve and also label its important
areas. 8
(b) What are main objectives of Creep Test ? How it _is carried out? - 6
(c) Discuss the effect of time, temperature and metallurgical variables on creep. 6
8452 2 6100+730
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| Earning: Approval pending. |
