OR Code No: 411855 IV-B.Tech. I-Semester Supplementary Examinations, May-2004
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Time: 3 Hours
MECHANICAL WORKING OF METALS (Metallurgy and Material Technology) Max. Marks: 70 Answer any FIVE questions All questions carry equal marks ---
Explain different forging operations with sketches. Derive an equation for forging pressure in case of forging of a flat plate under plane strain condition with coulomb friction.
2.a) b)
Distinguish between direct extrusion and indirect extrusion. Explain production of seamless pipes and tubes.
3.a) b)
Discuss ‘Von mises’ yield criteria for plastic deformation. Discuss slip line field theory of two-dimensional plastic flow.
4.a)
What are the various types of rolling mills and discuss their relative advantages and limitations? Draw the pressure distribution plot along arc of contact and explain its significance.
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1.a) b)
Describe tube sinking, plug drawing and mandrel drawing. Explain rod and wire drawing operations and describe conical drawing die.
6.a) b)
What are the advantages of cold working over hot working. Give classification of forging equipment and describe them, listing the characteristic features, with the help of neat sketches.
7.a) b)
What is plasticity? What are the basics of theory of plasticity and explain. Describe stress-strain curve and flow curve for a ductile metal.
8.
Write short notes on the following: a) State of stress at a point. b) Hot extrusion c) Extrusion defect d) Yield locus.
411855 IV-B.Tech. I-Semester Supplementary Examinations, May ...
4.a) What are the various types of rolling mills and discuss their relative advantages ... b) Draw the pressure distribution plot along arc of contact and explain its.
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