vtu.ac.in BE/B.Tech Material Science & Metallurgy Model Question Paper : Visvesvaraya Technological University

Name of the University : Visvesvaraya Technological University
Name of the Exam : B.E. Degree(CBCS)Examination
Degree : B.E. / B.Tech.
Paper : Material Science & Metallurgy
Year : 2016-17
Document Type : Model Question Paper
Website : https://vtu.ac.in/
Download Question Paper :
Material Science & Metallurgy : https://www.pdfquestion.in/uploads/14131-msm.pdf
Material Science & Metallurgy– I : https://www.pdfquestion.in/uploads/14131-msm1.pdf

BE/B.Tech Material Science & Metallurgy Model Question Paper :

Time: 3 hrs.
Max. Marks: 80
Note :
** Answer any FIVE full questions, choosing one full question from each module.

Related : Visvesvaraya Technological University BE/B.Tech Basic Thermodynamics Model Question Paper : www.pdfquestion.in/14128.html

Module 1 :
1) A) Define atomic packing factor. Sketch the unit cell of a FCC & HCP crystal structure. Derive an expression for the density of atomic packing to FCC & HCP structure. (12 Marks)
B) The unit cell of chromium is cubic and contains 2 atoms. Determine the dimension of the chromium unit cell when atomic weight (Cv) = 52 and density of chromium (?) =7.19mgm-3. (4 Marks)
OR
2) A) Sketch & explain different stages of creep. Which stage of creep is considered during designing a product? (8 Marks)
B) What do you mean by imperfection in crystals? Explain briefly the different types of crystal imperfections. (8 Marks)

Module 2 :
3) A) Mention the types of solid solutions. Enumerate Hume-Rothary rules governing the formation of solid solution. (8 Marks)
B) State & explain Gibbs phase rule. (4 Marks)
C) Explain the factors governing the formation of substitutional solid solutions. (4 Marks)
OR
4) A) Draw the Iron-carbon equilibrium diagram and label it. Show the invariant reactions. (8 Marks)
B) List & Discuss different types of stainless steels. (4 Marks)
C) Explain the effect of common alloying elements on steel. (4 Marks)

Module 3 :
5) A) What is Hardenability? Explain with neat sketch jominy-end quench test. (8 Marks)
B) Explain the steps to construct TTT diagram. Draw a labeled sketch of TTT diagram for an eutectoid steel. (8 Marks)
OR
6) A) Define surface hardening process. With the help of neat sketch explain different types of carburizing process. (8 Marks)
B) Sketch and explain any two types of cast iron, with microstructure, composition and properties. (8 Marks)

Module 4 :
7) A) Sketch & explain different methods of processing ceramics. (8 Marks)
B) Distinguish between the properties of ceramics, metals and plastics. (8 Marks)
OR
8) A) With a neat sketch explain any two methods of processing plastics. (8 Marks)
B) What are shape memory alloys? List the applications of shape memory alloys. Discuss the term “shape memory effect”. (8 Marks)

Module 5 :
9) A) Define composite material. Give the classification based on matrix and reinforcement. (8 Marks)
B) Sketch and explain Pultrusion process and filament winding process and mention the applications. (8 Marks)
OR
10) A) Sketch and explain Hand layup and spray layup process. Discuss their advantages and limitations. (8 Marks)
B) Derive the rule of mixtures for the modulus of elasticity of a fiber reinforced composite, when a stress is applied along the axis of the fiber. (8 Marks)

Material Science & Metallurgy– I :
Module I :
1 a. What are Imperfections? Explain how imperfections are helpful in engineering materials? (6 Marks)
b. Discuss the different types of stress cycles which can cause fatigue failure with the help of neat sketch. (4 Marks)
C. Illustrate the phenomenon and mechanisms of Diffusion. (6 Marks)
OR

2 a. Compare the engineering stress and strain with the true stress and strain for the tensile test of a low carbon steel that has the following test values: Load applied to specimen: 75kN Initial diameter of specimen: 12.5mm Diameter of specimen under 75kN load: l2mm. Assume no change in volume. (6 Marks)
b. List the various types of fractures in materials. (4 Marks)
c. Define creep. Explain the differences in various stages of creep with a neat figure.

Module II :
3 a. Two metals ‘A’ & ‘B’ are used to form an alloy containing 70%A & 30%B. ‘A’ melts at 610oc and ‘B’ at 410oc.When alloyed together, these metals form no compound or solid solution but forms eutectic at 40%A & 60%B. The eutectic solidifies at 260oc. Find

i. The temperature at which the alloy will begin to crystallize from the melt and at which the melt will be completely solid.
ii. The percentage of eutectic in the alloy at room temperature and 300oc. (10 Marks)
b. Define Nucleation. Explain heterogeneous nucleation with neat sketch. (6 Marks)
OR

4 a. Draw the Iron -carbon equilibrium diagram and label various phases present. Write the invariant reactions occurring in the diagram, indicating the temperature and compositions. (10 Marks)
b. Discuss the effect of alloying elements in steel. (6 Marks)

Module III :
5 a. Describe the methods of Hardening & Tempering heat-treatments with a neat sketch? Infer why hardening should be always followed by tempering process. (8 Marks)
b. Differentiate between Annealing & Normalizing. (4 Marks)
c. Discuss the properties, microstructure and composition of grey cast-iron. (4 Marks)

6 a. Explain various phases of T-T-T diagram for 0.8%c steel superimposing at least one cooling curve on it. (8 Marks)
b. Discuss any two surface hardening methods with suitable applications. (8 Marks)