GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER- IIT (New) EXAMINATION — WINTER 2019
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Subject Code: 2132004 Date: 3/12/2019
Subject Name: Principles Of Materials Science And Physical Metallurgy
Time: 02:30 PM TO 05:30 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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MARKS
Q.1 (a) Explain the need of material science in Engineering applications. 03
(b) Mention various polycrystalline and non-crystalline materials. 04
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(c) Discuss the factors that are taken into consideration in selecting materials for engineering application. 07
Q.2 (a) Derive Bragg’s Law. 03
(b) Draw a unit cells and show the following planes (1) 100 (2)111 (3) 112 (4) 001 04
(c) Draw and Explain iron — iron carbide diagram. 07
OR
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(c) Explain Eutectic, Eutectoid, Peritectic and Peritectoid Systems. 07
Q.3 (a) Ductile materials are tougher than brittle ones. Why? 03
(b) Differentiate between Micro Examination and Macro Examination of Engineering Metallic Materials. 04
(c) What is the use of Jominy hardenability test? Explain in Detail. 07
OR
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Q.3 (a) What is creep? Explain the factors affecting it. 03
(b) Differentiate crystalline and non-crystalline structure. 04
(c) Define heat treatment? Explain various stages of heat treatment. 07
Q.4 (a) Differentiate between carburizing and nitriding. 03
(b) Define the following properties of engineering materials. 04
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(1) Stress (2) Strength (3) Ductility (4) Fatigue
(c) Explain TTT diagram-with fully labeling. 07
OR
Q.4 (a) What is difference between Pre sintering and sintering? 03
(b) Give the overview of Hardening, tempering and normalizing processes. 04
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(c) Explain Gibb’s phase Rule. 07
Q.5 (a) Enlist the various techniques for powder production. Explain any one with neat sketch. 03
(b) Write down comparison of destructive and non destructive test. 04
(c) Explain magnetic particle test with diagram. State its application. 07
OR
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Q.5 (a) Define and explain annealing process. 03
(b) Explain the Principal of Ultrasonic Testing with neat sketch. 04
(c) What is powder metallurgy? Discuss advantages and disadvantages of powder metallurgy techniques. 07
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