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1. Code No: A109210306/R09
B.Tech II Year I Semester Examinations
May/June - 2012
METALLURGY AND MATERIAL SCIENCE
( Common to AME, MCT, ME, MIM )
Time: 3 Hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
- - -
(b) What is ASTM grain size number? Calculate the number of grains per square millimeter when number of
3. (a) Draw Cu-Ni phase diagram. Label all points, lines and areas. Explain the cooling behavior of 60 Ni-40 Cu alloy
(b) What would be the influence of each of the following alloying elements on the properties of a tool steel?
6. (a) Discuss the effect on corrosion resistance of copper when increasing the following additions of,
(i) Zinc
(ii) Tin
(b) Why is muntz metal heat treatable? Describe a typical heat treatment and the resulting microstructure. [15]
(b) Cite three important requirements that normally should be met by refractory ceramics and abrasive ceramics.
8. Distinguish the three different types of fiber reinforced composites on the basis of fiber length and orientation:
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comment on the distinctive mechanical characteristics of each type. [15]
(c) What do you mean by MEMS? Give two examples. [15]
7. (a) Name the two types of clay products and give two examples of each.
(iii) Nickel.
5. (a) Explain the mechanism of heat removal during quenching.
(b) Explain the importance of austenitizing temperature and homogeneity of austenite. [15]
4. (a) What are tool steels? Explain their classification.
Chromium, tungsten, molybdenum, vanadium, silicon, manganese and cobalt. [15]
from liquid state to room temperature.
(b) Differentiate between congruent melting compound and interstitial solid solution. [15]
equivalent grains observed at 200 X was 62. [15]
(b) Differentiate between intermetallic compounds and intermediate alloy phases. [15]
2. (a) Explain the governing rules for the formation of substitutional solid solutions.
1. (a) Discuss the effect of grain boundaries on the properties of metal/alloys.

2. Code No: A109210306/R09
II B.Tech I Semester Examinations,
May/June - 2012
METALLURGY AND MATERIAL SCIENCE
( Common to AME, MCT, ME, MIM )
Time: 3 Hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
- - -
(b) What is solid solution? Explain about different types of solid solutions with neat sketches.
3. Write short notes on the following with neat sketches.
(a) Eutectoid reaction
4. What are hadfield manganese steels? Discuss them with respect to classification, heat treatment and properties.
7. Write short notes on the following,
(a) Abrasive materials
(b) Constrast the mechanical characteristics of matrix and dispersed phases for fiber reinforced composites.
[15]
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8. (a) List four reasons why glass fibers are most commonly used for reinforcement.
(b) Applications of nano materials. [15]
(c) What is dezincification? How it is minimized? [15]
[15]
6. (a) Differentiate between the terms brass and bronze.
(b) Why most of the copper-zinc alloys are not age-hard enable?
5. (a) Describe how an I-T diagram is determined experimentally.
(b) Explain two different methods of obtaining a spheroidized cementite structure. [15]
(b) Eutectic reaction. [15]
[15]
2. (a) What is the necessity of alloying?
1. Explain different methods for grain size measurements. [15]

3. Code No: A109210306/R09
B.Tech. II Year I Semester Examinations,
May/June - 2012
METALLURGY AND MATERIAL SCIENCE
( Common to AME, MCT, ME, MIM )
Time: 3 Hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
- - -
(b) Calculate the force of attraction between Ca+1
and an O–2
ion the centers of which are separated by a distances
2. Write short notes on the following:
(a) Intermediate alloy phases
3. Write short notes on the following:
(a) Lever rule
(b) Explain why the two-phase titanium alloys are stronger than the single phase alpha alloys.
(c) Give at least two applications for alpha alloys. Alpha-beta alloys and beta alloys of titanium. [15]
(c) The modulus of elasticity for titanium carbide (TIC) having 5 vol % porosity is 30 GPa. Compute the modulus
8. (a) Name the three main divisions of composite material and explain the distinguishing feature of each.
(b) What is hybrid composite? List the important advantages of hybrid composites over normal fiber composites.
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[15]
of elasticity for the non-porous material. [15]
7. (a) Explain the desirable characteristic of glasses.
(b) What is the distinction between glass transition temperature and melting temperature?
6. (a) Explain important properties of titanium.
(b) Differentiate between full annealing and process annealing. [15]
5. (a) Explain the important characteristics of the martensite.
(b) Discuss the effect of carbon and silicon content on gray cast iron. [15]
4. (a) Explain the difference in microstructure and properties of white and gray cast irons.
(b) Phase rule. [15]
(b) Intermediate compounds. [15]
of 1.25 nm. [15]
1. (a) Explain the role of grains and grain boundaries in metals and alloys.

4. Code No: A109210306/R09
B.Tech. II Year I Semester Examinations
May/June - 2012
METALLURGY AND MATERIAL SCIENCE
( Common to AME, MCT, ME, MIM )
Time: 3 Hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
- - -
(b) What is crystallization? Explain the cooling behavior of a metal while cooling from liquid to solid.
[15]
2. Write short notes on the following,
(a) Necessity of alloying
(b) Explain the classification of ceramic materials on the basis of application. Give at least two examples for each.
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(b) Discuss about the classification of composites. [15]
8. (a) Cite the desirable features of metals-matrix composites.
[15]
7. (a) Explain why crystalline ceramic materials are normally brittle.
(c) Explain the heat treatment of AI-Cu alloys. [15]
(b) What is meant by anodizing?
6. (a) Explain the outstanding properties of aluminium.
5. (a) What are the limitations on the use of the I-T diagram?
(b) Define critical cooling rate. What factors influence the critical cooling rate? Explain. [15]
(b) Write short note on chilled cast iron. [15]
4. (a) Discuss the effect of manganese, sulphur and phosphorous in gray cast iron.
3. Explain the different methods of construction of phase diagrams. [15]
(b) Electron compounds. [15]
1. (a) Differentiate between ionic covalent and metallic bonding with examples.