Hall Ticket No Question Paper Code: AME005
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
Four Year B.Tech III Semester End Examinations (Supplementary) July, 2018
Regulation: IARE R16
METALLURGY AND MATERIAL SCIENCE
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. Draw a neat sketch of Hexagonal Close Packed(HCP) Structure. Also calculate its Atomic Packing
Factor.
"Grains are stronger than grain boundaries at high temperature and grain boundaries are stronger
than grains at room temperature". Validate this statement with detailed explanation.
2. Write about Solid Solution? Discuss about various conditions for forming substitutional solid
solutions?
Describe about intermediate alloy phase? Explain any one type of intermediate alloy phase with
suitable example.
UNIT II
3. Discuss about invariant reaction. Write down the following invariant reactions with examples
i. Eutectic
ii. Eutectoid
Two metals A and B of melting points 10000C and 8000C respectively have unlimited mutual
liquid solubilities. The solubility of B in A is maximum of 20% at the eutectic temperature
of 5000C, which reduces to 10% at 00C.The solubility of A in B is a maximum of 10% at the
eutectic temperature which reduces to at 00C. No solid state reactions other than those due
to solubility changes occur in the series. The eutectic composition is 70% B. Assume solidus,
liquidus and solvus lines to be straight.
i. Draw the phase diagram of the series
ii. Describe the mode of solidification, solid state reactions and room temperature of an alloy
containing 40%B.
4. Explain in detail about eutectic phase diagram with the help of neat sketches.
Explain briefly about construction of phase diagram of solid solution.
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UNIT III
5. Draw Fe-Fe3C diagram and show all phases, fields and temperature. Write all invariant reactions.
Also explain the solidification of steel containing 0.4%C.
Enumerate the difference between annealing and normalizing in detail.
6. Describe about Austempering and Martempering process for plain carbon steel. Draw cooling
curves for these processes.
Describe the principle of Flame hardening and Induction hardening with neat sketch.
UNIT IV
7. Explain the composition and properties of
i. Malleable Cast iron
ii. Spheroidal cast iron
Write about chilled cast iron? Describe its properties and application.
8. State the difference between Wrought alloys and Cast alloys.
Write short note on the following
i. Titanium alloys
ii. Copper nickel alloys
UNIT V
9. Mention different structures of crystalline ceramics. Describe briefly each of them.
Explain about cermets with its properties and applications.
10. Wriet a short note on roles of the following in composites
i. Matrix
ii. Reinforcement
iii. Interphase
Explain about pultrusion process with a neat sketch.