MU Mechanical Engineering (Semester 4)
Material Technology
December 2015
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 note on any four:
1 (a) Baushinger's effect related to fatigue of metal.
4 M
1 (b) Creep Test
4 M
1 (c) Effect of Alloy on TTT diagram
4 M
1 (d) Critical resolved shear stress
4 M
1 (e) Crystal Imperfection
4 M

2 (a) What do you mean by Composite Materials? Explain their properties and practical applications.
10 M
2 (b) What is Fatigue? Explain fatigue testing in detail.
10 M

3 (a) Draw Fe-Fe3C Diagram and Explain cooling of 1.0% C alloy in the Fe-Fe3C Diagram.
10 M
3 (b) Explain Flame Hardening and Induction Hardening.
10 M

4 (a) Draw and explain Time Temperature Transformation (TTT) diagrams of 0.8%C alloy.
10 M
4 (b) Derive an expression for Griffith theory of brittle fracture.
10 M

5 (a) What is plastic deformation? Distinguish between slip and twin mechanism of plastic deformation.
10 M
5 (b) What is case hardening? Explain carburising in detail.
10 M

Write short note on any four:
6 (a) Dislocation Jog and Kink.
4 M
6 (b) Austempering
4 M
6 (c) Bain's distortion model for martensitic transformation.
4 M
6 (d) Engineering Materials.
4 M
6 (e) Annealing
4 M



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