ME2253 ENGINEERING MATERALS AND METALLURGY 16 MARK QUESTIONS UNIT I CONSTITUTION OF ALLOYS AND PHASE DIAGRAMS 1. Discuss the similarities and differences between substutional and interstitial solid solution? 2 What is cooling curve? How does the time temperature cooling curve of an alloy of eutectic composition different from that of a pure metal? 3. Explain: 1. Eutectic reaction 2. Eutectoid reaction 4. Draw iron -carbide equilibrium diagram & mark on it all salient temperature and composition fields. 5. (i) Elements A & B melt at 7000 C and 10000 C respectively. Draw a typical isomorphous phase diagram between the elements A & B (ii) Elements A & B melt at 7000 C & 10000 C respectively. They form a eutectic at 35%A at temperature 5000 C. Draw a typical phase diagram between A & B 6. Metal A has melting point at 10000 C . Metal B has melting point of 5000 C. Draw one phase diagram (between the elements A & B ) for each of the following conditions. (i)The two elements exhibit unlimited solid solubility. (ii)The alloy systems show formation of two terminal solid solution and a eutectic point at 50%A and at7000 C. 7. (i)Give the classification of steel. (ii)Desirable properties and application of low, medium and high carbon steel. 8. (i) Explain the classification of steel. (ii)Desirable properties and application of GrayC.I, NoldularC.I, WhiteC.I, MalleableC.1. 9. What is an alloy steel? How are alloy steel classified? Explain them. 10. Explain: i). Peritectic reaction 11. Name and explain the constitutes in steels. 12. Draw the microstructure of plain carbon steel. 13. Draw the microstructure of plain carbon steel. 14. Draw the microstructure of gray cast iron. ii). Peritectoid reaction UNIT II HEAT TREATMENT 1. Define hardenability of steel .Explain the jominy end quench test used to determine hardenability of steel. How will you draw hardenability curves this sheet? 2 Explain: 1.Annealing 2.Spheroidising 3. (i) What are austempering and martempering ?What are their purpose? 4. Write short notes on: 1. Carburizing 2.Nitriding 3.Cyaniding 4.Carbonitriding. 5. Write short notes on (a) Flame hardening (b) Induction hardening. 6. (i)Draw the schematic isothermal transformation diagram corresponding to 0.8% of carbon steel. (ii)Explain hardening and tempering process. 7. Explain i).Normalizing ii).Hardening 8. Explain the steps in Case carburizing of steel. 9. Differentiate between annealing and normalizing. 10. Draw and explain salient points of isothermal transformation diagram. 11. Draw and explain various points in TTT diagram UNIT III MECHANICAL PROPERTIES AND TESTING 1. Explain with neat sketch of Rockwell hardness test. 2. Explain in details of Knoop micro hardness test. 3. Explain with neat sketch of impact test. 4. Explain with neat sketch of grain boundaries. 5. Explain with neat sketch of shear test. 8. Explain with neat sketch of brittle fracture. 9. Explain with simple sketch of shearing fracture . 10. Explain with simple sketch of mechanism of creep . 11. Explain the term creep fracture. 12. Explain with neat sketch of fracture toughness. 13. Describe briefly with neat sketch of Griffith theory. 14. Describe the equipment necessary for fatigue testing. 15. What is creep? Give some examples of equipment in which creep is likely to be encountered. 16. What are types of creep? Explain in detail. 17. Describe how tensile test is carried out in the laboratory? 18. Distinguish between Brinell hardness test and Vickers hardness test. 19. Explain the various applications of hardness test? UNIT IV FERROUS AND NON FERROUS METALS 1. Explain aluminum manufacturing process. 2. Explain monal metal. 3. Explain Titanium alloys. 4. Explain precipating hardening process. 5. Explain the requirements of bearing. 6. Name and explain various bearing materials used production of bearing. 7. Explain HSLA steels. 8. Explain maraging process. 9. Explain aluminium alloy. 10. Explain big iron production process. 11. Explain about effect of impurities on cast iron. UNIT V NON – METALLIC MATEIALS 1. Differentiate between thermoplastic and thermo- setting plastic. 2. Describe and differentiates addition polymerization and condensation polymerization 3. Explain polyphylene terophthalate. 4. Describe polypropylene and Write the properties application of poly propylene. 5. What are some outstanding properties of ceramic materials? 6. Describe the term poletherether ketone. 7. Explain some special heat treatment operation performed on glass products? 8. Describe about abrasives. 9. How might plastic be defined from the view points of chemistry, structure, fabrication and processing? 10. Explain PA, PC. 11. Explain PEET, ABS.