Hall Ticket No Question Paper Code: AME005
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech III Semester End Examinations (Supplementary) February, 2018
Regulation: IARE R16
MATALLURGY AND MATERIAL SCIENCE
(Mechanical Engineering)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Write the difference between crystalline solids and amorphous solids.
Describe the following types of bonds
i. Ionic
ii. Covalent
iii. Metallic
Discuss how strength, ductility and electrical conductivity are influenced by these bonds.
2. What is a solid solution? What are the conditions for forming substitutional solid solutions?

What do you mean by intermediate alloy phase? Explain any one type of intermediate alloy
phase with suitable example.
UNIT II
3. State and discuss Gibb's Phase rule.
Two metals A and B are used to form an alloy containing 75% A and 25% B. A melts at 600oC
and B at 400oC. When alloyed together these metals form no compounds or solid solutions, but
form an eutectic at 40%A and 60%B. Assume that the liquidus lines are straight and the eutectic
solidifies at 250oC.
i. Construct the phase diagram and label each region Construct the phase diagram and label
each region.
ii. Determine the Eutectic at room temperature and of solid in the alloy at 300oC.
iii. Find the temperature at which the alloy will begin solidification and completes the solidification.
4. Explain the following with neat diagrams Peritectic system Eutectoid system.
Explain Aluminium rich portion of Al-Cu phase diagram with neat sketch and label the various
points, lines and areas.
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UNIT III
5. Draw Fe-Fe3C diagram and show all phases, fields and temperature. Write all invariant reaction
and explain the solidification of steel containing 0.4%C.
Enumerate the difference between annealing and normalizing.
6. Draw TTT diagram for eutectoid steel and explain the different microstructures obtained at
various cooling rates.
What is Martempering? What are its advantages over conventional hardening process.
UNIT IV
7. Explain various heat treatment process given to cast iron? Explain them in brief.
Write short note on the following
i. Ni-Resist Cast Iron
ii. Ni-Hard cast iron
8. Write short note on the following
i. Gun metal
ii. Cartridge Brass
Why alpha brass is more ductile than 60 40 brass?
UNIT V
9. Discuss types of glasses. Explain properties and applications of various glasses.
Discuss properties and applications of crystalline ceramics.
i. Grain size and shape
ii. Purity
iii. Porosity
10. Write short note on the following
Metal matrix composite
ii) Ceramic-matrix composite
Differentiate between thermoplastics and thermosetting plastic.