ME2253 ENGINEERING MATERIALS AND METALLURGY Questions Bank 2014

Anna University, Chennai

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PART B UNIT -1

1) Draw the Iron – Carbon Diagram neatly (MAY /JUNE 2006) (NOV/DEC 2006) ( MAY/JUN 2007) ( APR/MAY 2010 ) ( APR/MAY 2011)

2) Using the iron – carbon diagram predict the micro structure at room temperature of the carbon steel that contains 0.4%when cooled in furnace ?(MAY /JUNE 2006)

3) Elements A and B melt at 7000c and 10000c respectively. Draw a typical isomorphous phase diagram between the elements A and B(MAY /JUNE 2006)

4) Elements A and B melt at 7000c and 10000c respectively . They form a euetectic at

35% A at temperature 5000c. Draw the typical phase diagram between A and B (MAY

/JUNE 2006)

5) Estimate the carbon content of carbon steel whose microstructure in the annealed condition shows 75% pearlite and 25% ferrite ? (NOV/DEC 2006)

6) Metal A has melting point of 10000c. Metal B has melting point of 5000c. draw Phase diagram (between the elements of A and B ) for each of the following conditions (NOV/DEC 2006)

i) The two elements exhibit unlimited solid solubity ?

ii) The alloy system shows formation of two terminal solid solutions and eutectic reaction point, at 50% A and at 7000c

iii) The alloy system shows formation of an intermettalic phase with the chemical formula A2B.

7) Two elements A and B have melting points 8000c and 6000c respectively

i) Draw a phase diagram between A and B if they exhibit unlimited solid solubility ii) Draw a Phase digram between A and B if a eutectic reaction occurs at composition 40%B and at temperature 4000c. Assume that the maximum solid solubity in either case is 5% and the room temperature solubity in either case is

1%( MAY/JUN 2007)

8) What will be the microstructure of a 2.5%C steel at room temperature ? ( MAY/JUN

2007)

9) Metals A and B having melting points respectively 2700c. and 3200c are assumed to be completely soluble in the liquid state and completely in soluble in solid state. They form euetectic at 1400c. containing 40%B( NOV/DEC 2007 )

i) Draw these equilibrium diagram and label all lines and areas and

ii) For an alloy containing 30%A give the temperature of initial and final solidification and relative amounts of phase present at 180

10) With the help of the Fe- C equilibrium diagram describe completely the change that takes place during the slow cooling of 0.5% carbon steel from liquid state. ( NOV/DEC

2007 )

11) What are the micro- constituents of iron ? Discuss them briefly ?( APR /MAY 2008)

12) How are solid solutions classified ? Give two examples for each . ( APR /MAY 2008)

13) Draw the Fe- Fe3C equilibrium diagram and discuss the different phases and reactions that takes place in it. ( APR /MAY 2008) ( MAY/ JUN-2009 ) ( APR/MAY 2010 ) ( NOV/DEC-2010 ) ( NOV/DEC-2010 )

14) With the ideal phase diagram, cooling curves and examples, explain the following binary systems. Also name the system: ( MAY/ JUN-2009 )

i) Two components completely soluble in liquid and completely insoluble in the solid state

ii) Two components completely soluble in these liquid and completely soluble in the solid state.

15) Discuss Hume – rothery rules for the formation of solid solutions ( APR/MAY 2010 )( APR/MAY 2010 )

16) Draw a typical isomprphous phase diagram and explain the structural changes of an alloy ( say 50%% A & say 50% B ) .Apply lever rules at some temperature in the alpha +

liquid portion for this alloy.( APR/MAY 2010 )

17) Discuss the composition, properties and application of the following cast iron : ( APR/MAY 2010 )

i) Malleable cast iron ii) Spheroidal cast iron

18) What is the solid solution? Explain the Humerothery rules governing substitutional solid solution. Draw the isomorphous phase diagram ? ( NOV/DEC-2010 )

19) Explain the classification of steels along with applications? ( NOV/DEC-2010 )

20) What are the different types of cast iron ? Draw the micro structure of any four type of cast iron. Give any one applications for each ( APR/MAY 2011)


UNIT -2

1) Draw a schematic CCT diagram for a carbon steel containing 0.8% carbon. Using this diagram, Expalin how different cooling curves lead to the

i) Annealing heat treatment (NOV/DEC 2009)(APR/MAY 2010)

ii) Normalising heat treatment ( NOV/DEC 2007)

iii) Hardening heat treatment

iv) Spheroidising (MAY/ JUNE 2006) ( MAY/JUNE 2007) ( NOV/DEC 2007) ( APR/MAY 2011)

2) Explain How jominy end quench test is used for determining the hardenability of steels (MAY/ JUNE 2006) (NOV/ DEC2006) ( MAY/JUNE 2007) ( NOV/DEC 2007) (MAY/JUNE 2009)(NOV/DEC 2009) ( APR/MAY 2011)

3) Explain the steps in case carburising of steels (MAY/ JUNE 2006)

4) Draw the schematic isothermal transformation diagram corresponding to 0.8% carbon steel (NOV/ DEC2006) (MAY/JUNE 2009) ( APR/MAY 2011)

5) Explain the Hardening and tempering process with respect to heat treatment procedure, microstructure and mechanical properties (NOV/ DEC2006)( APR/MAY 2008)

(NOV/DEC 2009) ( APR/MAY 2010) ( APR/MAY 2011)

6) With the help of TTT diagram explain the following heat treatments applied to an euetectoid steel

i) Austempering ii) Martempering

iii) Hardening ( NOV/DEC 2007) (APR/MAY 2008) (NOV/DEC 2009) ( APR/MAY

2010) ( MAY/JUNE 2007)

7) Distinguish between diffusion and thermal surface hardening treatments ( NOV/DEC

2007)

8) EXPLAIN in detail the flame hardening and induction hardening (NOV/DEC 2009)

9) Discuss the different types of annealing process ? ( APR/MAY 2010)

10) WHAT IS CASE HARDENING ? explain the following process :

i) Carburizing

ii) Nitriding (APR/MAY 2010)

11) What is hardenability? Describe a test that is used for determination of hardenability of steel? ( APR/MAY 2010)

12) Give the process details of full annealing treatment for steels( APR/MAY 2010)


UNIT – 3

1) Write a short notes on compositions and properties of the steels :

i) Austenitic stainless steels ii) High speed steels

iii) Martensitic stainless steels

iv) Maraging steels (MAY/JUNE 2006) ( MAY/JUNE 2007) (APR/MAY 2011)

2) How will you classify brasses based on the composition of zinc ? Explain the properties and applications of the main types of brasses? (MAY/JUNE 2006)

3) Explain the steps involved in precipitation hardening?(MAY/JUNE 2006) ( NOV/DEC

2006) (MAY/JUNE 2007) (NOV/DEC 2007) (MAY/JUNE 2009) ( APR/MAY 2010) (APR/MAY 2011)

4) Discuss the austenitic stainless steels and martensitic stainless steel with respect to composition, properties and application( NOV/DEC 2006) (MAY/JUNE 2007)

5) Discuss the strengthening mechanism, composition and properties of anyone types of maraging steels ( NOV/DEC 2006)

6) What are the alpha brasses and alpha- beta brasses? What are their properties and applications? ( NOV/DEC 2006) (MAY/JUNE 2007)

7) Explain how a malleabilising heat treatment will convert a white cast iron to a malleable cast iron (MAY/JUNE 2007)

8) Ferritic stainless steels- composition, properties, Applications (MAY/JUNE 2007)

9) What are the stainless steels ? what are the main characteristics of stainless steels ? Name different types of stainless steels and their main application ? ( NOV/DEC 2007)( APR/MAY 2010)

10) What are the HSLA steels? How can high strength and toughness be obtained in them ? (NOV/DEC 2007) ( APR/MAY 2010)

11) Describe the properties and applications of the following Cu-Zn Brasses, Naval Brass and Muntz metal (NOV/DEC 2007) ( APR/MAY 2010)

12) Discuss the characteristics of Aluminium and also mention its alloys their properties and uses ? ( APR/MAY 2008)

13) Discuss the influence of each of the following alloying elements on the properties of steel:

i) Molybdeum ii) Chromium iii) Manganeses iv) Vanadium

v) Titanium

vi) Tungsten

vii) Silicon (MAY/JUNE 2009)( APR/MAY 2008)

14) Give the composition, property and uses of S.G iron,18-4-1 HSS and Monelmetal

(MAY/JUNE 2009)

15) State the composition, properties and uses of bearing alloys. (MAY/JUNE 2009) (APR/MAY 2010) ( NOV/DEC 2010)

16) Explain the effects of alloying elements in steels (MAY/JUNE 2009)

17) Discuss about the grey cast iron? (MAY/JUNE 2009)

18) Discuss the composition, properties, application --- Malleable cast iron, Spheroidal cast iron ( APR/MAY 2010)

19) Discuss the composition, properties, application --- Stainless steels, Tool steel

( APR/MAY 2010)

20) Discuss the composition, properties, application --- Cupro – Nickel, Bronze ( APR/MAY

2010)

21) Classify the ferrous material with respect to alloying elements, microstructure and properties and write the effect of alloying addition in steels ( NOV/DEC 2010)

22) Write a short notes on light weight nonferrous alloys and discuss the aluminium and its alloy with respect alloying and heat treatments ( NOV/DEC 2010)

23) What are important alloying elements in steels? Discuss the purpose for which alloying elements are added? ( NOV/DEC 2010)

24) Discuss briefly the different types of cast irons ( NOV/DEC 2010)

25) Mention any three copper base alloys. Give the composition, properties, Application.

26) What are the effects of Si,Ni,Mn and Cr in steel and also in Fe-c diagram. (APR/MAY

2011)

27) Discuss any two copper base, any two aluminium base alloys. Give at least one applications for each(APR/MAY 2011)


UNIT – 4

1) Decsribe the molecular structure, properties and applications of the following polymers i) Polyvinyl chloride( PVC) (MAY/ JUNE 2007) (NOV/DEC 2007)

ii) Polystyrene(PS) (NOV/DEC 2007)

iii) Polyethylene Terephthalate (PET)

iv) Polycarbonate ( PC) (MAY/ JUNE 2006)

2) Discuss the properties and applications of the following ceramic materials i) Alumine ( MAY/JUNE 2009)

ii) Silicon carbide ( MAY/JUNE 2009) iii) Silicon Nitride ( MAY/JUNE 2009) iv) Sialon(NOV/ DEC 2006)

v) Silica ( MAY/JUNE 2009)

3) Discuss the Structure, properties and application of the following polymeric materials i) Polymethyl methacrylate

ii) Polyterafluoroethylene (MAY/ JUNE 2007) (NOV/DEC 2007) (NOV/DEC 2010) ( NOV/DEC 2010)

iii) Polyethyylene terephthalate (MAY/ JUNE 2007) iv) Acryonitrile butadiene styrene(NOV/ DEC 2006) v) Polypropylene (MAY/ JUNE 2007)

4) Write a short notes about the different types of matrix materias and reinforcement materials used to make polymermatrix composites (MAY/ JUNE 2007)

5) Discuss the properties and applications of Al2 O3 and SiC ceramics (NOV/DEC 2007) (NOV/DEC 2010)

6) Compare and contrast the difference between polyprpelene and polyethylene

(NOV/DEC 2007)

7) Compare the difference between

i) Acrylotrile – butadiene – styrene (NOV/DEC 2007)

ii) Stabilized zirconia iii) Sialon

8) Describe these different types of reinforced used in polymer composites (NOV/DEC

2007)

9) Discuss the properties and applications of ceramics materials in industries ( APR/MAY

2008) ( NOV/DEC 2010)

10) Describe the mechanical behaviour of polymers ( APR/MAY 2008)

11) With the schematic diagram illustrate the the processing of reinforced composites

(APR/MAY 2008)

12) What are the special properties of plastics that make them useful engineering material(MAY/JUNE 2009)

13) How do thermoplastics differ from thermosetting materials . Explain ? ( APR/MAY

2008)(APR/MAY 2011)

14) Write short notes on particle reinforced composites and fibre reinforced composites

( MAY/JUNE 2009) ( NOV/DEC 2010)

15) Write short notes on 1) ceramics ) formaldehyde (NOV/DEC 2009)

16) What is PMMA ? Describe it in detail (NOV/DEC 2009)

17) Explain in detail engineering polymers (NOV/DEC 2009)

18) State the properties and uses of reinforced concrete (NOV/DEC 2009)

19) What are the different types of polymers ? give any four polymers, their properties and applications(APR/MAY 2010)

20) What are the different types of engineering ceramics ? give any four ceramics, their properties and applications (APR/MAY 2010)

21) Write down the composition and applications of the following metals i) Stainless steel

ii) Tool steel(APR/MAY 2010)

22) What is the precipitation hardening ? Iilustrate this with an examples? (APR/MAY 2010)

23) Enumerate the composition and applications of the following alloys i) Cupro – nickel

ii) Bronze

iii) Bearing alloy (APR/MAY 2010)

24) State the effects of the following alloying elements in steel i) Chromium

ii) Molybdenum (APR/MAY 2010)

25) Write the properties and applications of the following polymers and discuss anyone fabrication methods of polymers

i) PE ( NOV/DEC2010) ( NOV/DEC 2010)

ii) PEEK ( NOV/DEC2010)

iii) ABS ( NOV/DEC2010)

26) List the important engineering ceramics and its application. Discuss the properties and application of Si3N4 AND SiC ( NOV/DEC 2010) (APR/MAY 2011)

27) What are different types of plastics? Explain with examples and applications ( NOV/DEC

2010)

28) Discuss the properties and application of the following four ceramics

Zirconia, Silica, Cubic boron nitride (APR/MAY 2011)


UNIT – 5

1) Explain the mechanism of plastic deformation of metals by slip and twinning ? (MAY/ JUNE 2006)

2) Explain the characteristic of ductile fracture and brittle fracture ? explain the testing

(MAY/ JUNE 2006) (NOV/ DEC2006) (NOV/DEC-2007) ( MAY/JUNE 2009)

3) Procedure for Vickers hardness testing (MAY/ JUNE 2006) (NOV/ DEC2006) (NOV/ DEC2010) (APR/MAY 2011)

4) Explain the testing procedure for charpy impact testing (MAY/ JUNE 2006) (MAY/ JUNE

2007) (APR/MAY2008 )

5) What are the slip and twinning ?What are the charateristics ? (NOV/ DEC2006)

6) Write a short notes about different types of metallic fracture (MAY/ JUNE 2007)

7) Explain the testing procedure for determining the following properties i) Brinell hardness

Number ii) Creep strength (MAY/ JUNE 2007)

8) Explain the mechanism of plastic deformation of metals by slip (NOV/DEC-2007)

9) Draw S-N curve for mild steel and aluminium and explain its features . Explain for procedures used to obtain S-N diagram (NOV/DEC-2007)

10) What are the salient features of Rockwell –hardness test? What are the precautions to be taken while determining hardness by this method (NOV/DEC-2007) (NOV/ DEC2010)

11) List the types of fracture and factors influencing them (APR/MAY2008 ) (APR/MAY

2011)

12) Give the griffith crack model for the mechanism of fracture (APR/MAY2008 )

13) What does impact test signify ? Explain impact Izod test with neat sketches( MAY/JUNE

2009) (APR/MAY 2011)

14) What is fatigue failure ?How fatigue test is carried out ? explain ( MAY/JUNE 2009) (APR/MAY 2010) (NOV/ DEC2010) (APR/MAY 2011)

15) What do you mean by engineering stresses and true stresses ( MAY/JUNE 2009)

16) Explain the mechanism of plastic deformation ( NOV/DEC 2009)

17) Write short notes on creep ? ( MAY/JUNE 2009) (APR/MAY 2010)

18) Describe the procedure of tensile test for metals ( MAY/JUNE 2009)

19) Write a short notes on hardness testing ( MAY/JUNE 2009)

20) Discuss the mechanism of slip taking place in metals using edge dislocation and screw dislocation(APR/MAY 2010)

21) Explain the following terms i) Mechaniclal Behaviour ii) Thermal Behaviour iii)Electrical

behaviour (APR/MAY 2010)