0800 MET205122004 Pages: 2

Reg No.: Name:

Max. Marks: 100

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‎APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree Examination December 2020 (2019 Scheme)

‎Course Code: MET205
Course Name: METALLURGY AND MATERIAL SCIENCE

‎PARTA

‎Answer all questions. Each question carries 3 marks
Compare covalent bonds with Ionic bonds.
Define atomic packing factor. Calculate the APF for a BCC structure.
Compare scanning electronic microscope (SEM) with Transmission electron
microscope (TEM).
What is diffusion in Solids? State and explain the Fick’s law of diffusion.
Compare CCT diagram with TTT diagram for an eutectoid iron carbon alloy.
With a neat sketch describe the Jominy end quench test.
How does the carbon content effect the properties of carbon steel?
Which are the important properties associated with high speed steel?

‎What is the composition of Maraging steels? Where do Maraging steel find

‎application?

‎10 Which are the common types of ceramics?

‎11

‎12

‎13

‎PART B

‎Answer any one full question from each module. Each question carries 14 marks

‎Module 1
What is plastic deformation? Describe the slip and twinning modes of plastic
deformation with simple sketches.
What are the miller indices? Explain the procedure for obtaining miller indices
for any crystallographic plane with a suitable example.

‎Module 2
(a) Define dislocations. (4 marks)
(b) With the help of simple sketches differentiate between edge dislocation and

‎screw dislocation. (10 Marks)

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‎Duration: 3 Hours

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