B.TECH - Semester 4 metallurgy and material science Question Paper 2019 (sep)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- How are Miller indices of a crystallographic plane obtained? Give an example.
- What is a Frank Read source?
- What is the difference between polymorphism and allotropy?
- Explain Fick's laws of diffusion.
- A binary alloy of copper and nickel containing $20 \%$ weight Ni at a particular temperature coexist with solid phase having $26 \%$ weight Ni and liquid phase of $16 \%$ weight Ni. What is the weight ratio of solid and liquid phase?
- Why are thicker sections more susceptible to cracking during hardening?
- Explain the mechanism of fatigue failure.
- What is Griffith's crack theory?
- Explain the phenomenon of ductile to brittle transition.
- Give the composition and uses of any two alloys of copper. PART - B
- (a) What is the significance of atomic packing factor of a crystalline structure? Prove that atomic factors of FCC and HCP structures are same. 12
- (b) Differentiate between slip and twinning.
- (a) Explain the important imperfections in a crystal.
- (b) What is critically resolved shear stress? Obtain an expression for it.
- (a) Construct a hypothetical phase diagram for metal A and metal B between room temperature of $20^{\circ} \mathrm{C}$ and $700^{\circ} \mathrm{C}$ given the following information. Melting point of $A$ is $480^{\circ} \mathrm{C}$ and of $B$ is $600^{...
- (b) Explain the three invariant reactions in the iron carbon equilibrium diagram. 10
- (a) Sketch and explain the TTT diagram for a eutectoid steel.
- (b) What is recrystallization temperature? What are the factors upon which it depends?
- (a) What is creep? With the help of creep curve, explain the mechanism of creep.
- (b) Why a smart material is called so? Explain the properties of a smart material.
- (a) What is the difference between steel and cast iron?
- (b) Explain the different types of cast iron and how their properties vary according to the mode in which carbon is distributed. ( $\mathbf{3} \boldsymbol{\times} \mathbf{2 0} \boldsymbol{=} \mathbf{6 0}$ Marks)