E B3E087 Total pages:2

Reg. No. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2017

ME210: METALLURGY AND MATERIALS ENGINEERING (MA, ME, MP, PE)

Max. Marks: 100 Duration: 3 Hours
PART A
(Answer any THREE questions)

1. a) Describe the procedure to obtain Miller indices for crystal planes. (3)
b) What are Bravais lattice systems? What is a unit cell? (7)
2. a) Obtain atomic packing factor for BCC structure. (5)
b) Explain Schmid’s law and the term critical resolved shear stress. (5)
3. Distinguish Edge and screw dislocations with a sketch of Burger’s vector. (10)

4. a) Describe step by step procedure for metallographic specimen preparation? Name

any two etchants. (5)

b) Explain the procedure to study crystal structure using X-Ray diffraction (XRD)
method. (5)

PART B
(Answer any THREE questions)
5. a) Define the terms solubility limit and solid solutions. (3)

b) Explain the Hume-Rothery’s Rules and its importance. (4)

c) Draw the phase diagram of a pure substance with a suitable example and explain

the triple point with its significance. (3)

6. What are strengthening mechanisms? Explain. (10)
7. a) Differentiate pure substance and alloy. (2)
b) What is alloying? Why it is done? (4)

c) Give 4 major alloying elements used in iron and their specific advantages and applications of
the alloy. (4)
8. Classify Grey cast iron and explain their composition, microstructure and applications.

(10)

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