MU Mechanical Engineering (Semester 4)
Material Technology
December 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Write short note on any four of the following:-
1 (a) Burgers vector
5 M
1 (b) Creep Resistant Materials
5 M
1 (c) Important of Iron as engineering material
5 M
1 (d) Managing heat treatment process
5 M
1 (e) Classification of alloying elements
5 M
1 (f) Composite materials
5 M

2 (a) Draw and explain Isomorphous and Eutectoid Phase diagrams.
8 M
2 (b) Explain the process of dislocation by Frank Read source.
6 M
2 (c) Explain Andrade's analysis of the classical creep curve.
6 M

3 (a) What is Surface hardening? Name its different methods. Discuss any one method in detail.
8 M
3 (b) Draw a neat and labelled microstructure of White Cast Iron, Grey Cast Iron and Nodular Cast Iron.
6 M
3 (c) What is Critical Resolved Shear Stress? Derive the expression for Critical Resolved Shear Stress for deformation by slip.
6 M

4 (a) Explain the stages of recrystallization annealing and factors affecting it.
8 M
4 (b) Discuss the Subzero heat treatment of Steel.
6 M
4 (c) What are the limitations of Plain Carbon Steel? Explain the effect of alloying elements on phase transformation.
6 M

5 (a) State Griffth's theory of brittle fracture and derive Griffth's equation.
8 M
5 (b) Discuss the Full Annealing heat treatment of Steel.
6 M
5 (b) Give classification on stainless steel.
6 M

6 (a) Draw neat Iron-Iron Carbide Equilibrium diagram indicating all important temperature, phase and composition.
8 M
6 (b) Explain fatigue limit for ferrous and non-ferrous alloys with the help of S-N diagram.
6 M
6 (c) What are Nano Materials? Write a note on Nano Composites.
6 M



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