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Materials Engineering & Their Processing (October 2009)

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Total No. of Questions : 12] P1205 [Total No. of Pages : 4 [3664] - 127 B.E. (Mech.) MATERIALS ENGINEERING AND THEIR PROCESSING (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) Solve the following : a) Explain the austenite to pearlite transformation with sketches. Explain the effect of cooling rate on the morphology and properties of pearlite. [6] b) Explain the effect of non-equilibrium cooling with the use of iron cementite phase equilibrium diagram on microstructure and properties of steel. [4] c) Explain the effect of alloying elements on the following : [6] i) Volume change during hardening. ii) Corrosion and oxidation. iii) Critical cooling rate. OR Q2) Solve the following : a) How carbon is estimated from microstructure of i) Slowly cooled hypoeutectoid steels. ii) Slowly cooled hypereutectoid steels. [4] b) Discuss the correlation between machinability, microstructure and properties of steels. Why manganese is added in free cutting steels? [6] c) Explain the development of microalloyed steels with respect to composition, properties and applications. [6] P.T.O.

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Additional Info : 2003 Course
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