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Posted By: kondapalli Member Level: Gold Posted Date: 01 May 2008
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2007 Jawaharlal Nehru Technological University M.E Manufacturing Enginnering MATERIAL TECHNOLOGY Question paper
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Answer any FIVE questions
All questions carry equal marks
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1.a) Classify the types of dislocations and explain their mechanism of formation.
b) Explain Von Moises yield criterion. Derive the necessary equation from fundamentals.
2.a) What is the effect of temperature and strain rate on plastic behaviour of medium carbon steels? Explain.
b) What do you understand by fiber and dispersion strengthening? Give example.
3.a) Explain the phenomenon of ductile and brittle transition in steel.
b) Explain the role and use of stress intensity factors in design with examples of bolts and rivets.
4.a) Distinguish between low and high cycle fatigue and give some practical examples.
b) How is creep rupture strength is predicted using Larson-Miller method? Explain.
5.a) What are the various factors to be considered for materials in marine applications. Give examples.
b) Explain the Soderberg equation for evaluating endurance strength.
6.a) What are smart materials? What are their characteristics and applications?
b) What are the important properties of managing steels? How are they produced?
7.a) Briefly describe the various types of coatings given on carbide tools.
b) Comment on the various applications of Diamond as cutting tool material.
8. Write short notes on the following:
(a) Metallic glass (b) Super plasticity (c) Fracture mechanism maps.
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