GTU Material Science & Metallurgy - May 2015 Exam Question Paper

GTU Mechanical Engineering (Semester 3)
Material Science & Metallurgy
May 2015

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) What are the engineering requirements of materials? Explain in detail.

7 M

1 (b) Explain Structure Property and Performance relationships with a suitable example.

7 M

2 (a) Differentiate under-cooling and constitutional super-cooling in context of solidification and its effect on final structure.

7 M

Answer any one question from Q2 (b) & Q2 (c)

2 (b) What are the various levels of structure? Explain in detail.

7 M

2 (c) Explain homogenous and heterogeneous nucleation with neat sketches.

7 M

Answer any two question from Q3 (a), (b) & Q3 (c), (d)

3 (a) What is strain hardening? Explain how the effect of strain hardening can be eliminated by recrystallization?

7 M

3 (b) Explain the three basic zones formed after solidification of alloys.

7 M

3 (c) What are the various methods of controlling grain structure during solidification? Explain in detail.

7 M

3 (d) What is Gibbs Phase Rule? Clearly explain all variables?

7 M

Answer any two question from Q4 (a), (b) & Q4 (c), (b)

4 (a) Explain substitutional solid solution and Hume Rothery Rule for the feasibility of it.

7 M

4 (b) Draw a neat and labeled Iron-Iron Carbide diagram and explain eutectic and eutectoid reaction in it.

7 M

4 (c) What is substitutional and interstitial solid solution. Why solubility of solute is limited in interstitial solid solution? Justify.

7 M

4 (d) What is plain carbon steel? Also explain all type of plain carbon steel with the composition and specific application.

7 M

Answer any two question from Q5(a), (b) & Q5 (c), (d)

5 (a) Explain the property requirement from a bearing material. Explain journal bearing material in detail.

7 M

5 (b) Draw and label TTT diagram for eutectoid steel and show annealing and normalizing in it. Explain the critical cooling rate with the help of TTT diagram.

7 M

5 (c) Explain the requirements of metal powders used in powder metallurgy. Also explain various methods of powder production.

7 M

5 (d) Explain the steps of Dye Penetrant Testing with neat sketch

7 M

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