E B3E086S Pages: 2
Reg. No. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JULY 20017620:
METALLURGY AND MATERIALS ENGINEERING
(MA, MP, ME, PE)
Max. Marks: 100 Duration: 3 Hours

PARTA
(Answer any THREE questions)

1. a. Derive the expression for atomic packing factor for the FCC crystal structure. (5) b.
Describe the frank read source theory of dislocations. (5)

2. a. Copper has an atomic radius of 0.128 nm, an FCC crystal structure, and anatomic

weight of 63.5 g/mol. Compute its theoretical density. (6) b. State and explain Fick’s

first law. (4)

3. a. Compare edge dislocation and screw dislocation (5) b. State
and explain Fick’s second law (5)

4. Explain mechanisms of plastic deformation of metals by slip and twinning. (10)

PART ந
(Answer any THREE questions)

5. a) State the Hume Rothery rules for substitutional solid solution. (4)

b) Distinguish between the properties of pearlite and martensite. (6)

6. With a neat sketch explain the iron-carbon equilibrium diagram and also give the

equations for the binary reactions depicted in it. (10)
7. a) What is hardenability? Explain the Jominy end quench test. (5) b)
Explain any two strengthening mechanisms. (5)
8. a) Differentiate between the properties of Mo-type and W-type HSS (4)
b) List the major features of any three types of cast iron. (6)

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