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Materials Engineering & Their Processing (April 2010)

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Total No. of Questions : 12] P1513 [Total No. of Pages : 4 [3764]-136 B.E. (Mech.) MATERIALS ENGG. AND THEIR PROCESSING (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) A slowly cooled plain carbon steel has proeutectoid ferrite to be 10% of its eutectoid ferrite. What is the carbon content of steel? [6] b) Explain the effect of following factors on the properties of steel. i) Shape of proeutectoid ferrite. ii) Shape of proeutectoid cementite. iii) Hardness of ferrite and cementite. c) Compare and contrast Austenitic and Ferritic stainless steels with respect to composition, properties and applications. [6] OR Draw the microstructure of annealed steel. Explain the effect of carbon on mechanical properties of annealed steel. [6] Q2) a) [6] b) Give the classification of tool steels and state two applications of each. Why tool steels are multitempered? [6] c) Draw Fe - Fe3C phase equilibrium diagram and label properly. Explain [6] the significance of Fe - Fe3C phase equilibrium diagram. Q3) a) Draw the TTT curve for hypoeutectoid steel and explain the following heat-treatments. [6] i) Austempering ii) Marquenching P.T.O. 1

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Additional Info : 2003 Course
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