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0800 MET205122004

(a) Describe the steps involved in preparing a sample for metallographic
examination. (5 marks)
(b) Why is metallographic etching done? Describe the main metallographic
etching process. (9 marks)
Module 3
(a) What is the difference between hardness, hardening process and
hardenability? (6 marks)
(b) What is surface hardening? Compare induction hardening process with
surface diffusion hardening process. (8 marks)
With the help of an iron carbon diagram explain the eutectoid, eutectic and
peritectic reaction of iron carbon alloy system.
Module 4
(a) What is the strengthening of metals? Why is strengthening carried out?
(4 marks)
(b) Compare solid solution hardening with age hardening. (10 marks)
(a) Differentiate between hot and cold working? (4 marks)
(b) Compare phase transformation hardening with strain hardening. (10 marks)
Module 5
(a) Discuss the composition, properties and applications of Metal Matrix
Composites and Ceramic Matrix Composites. (8 marks)
(b) Define superplasticity. Why superplasticity is needed and what are its areas
of applications? (6 marks)
(a) Define creep and sketch the creep curve. (7 marks)

(b) Describe the mechanism of creep. (7 marks)

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