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Engineering Materials & Metallurgy: Inst Ruct Ions T O Candidat Es

This document is an exam for an engineering materials and metallurgy course consisting of 8 questions across 2 pages with instructions for candidates. It covers topics like heat treating wrought iron, phase formation in pure metals, microstructure and properties of pearlite and bainite, diffusion mechanisms, alloy classification, crystal structures, solubility in solid solutions, effects of chromium addition, annealing vs quenching heat treatments, recrystallization, austenitic stainless steels, ferrite types in steel, and case hardening applications. Students are instructed to attempt any 5 questions out of 8, with each question carrying 6 marks. The document also notes any wrongful activity like cheating or sharing materials will be treated under the

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Manoj Kumar
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72 views2 pages

Engineering Materials & Metallurgy: Inst Ruct Ions T O Candidat Es

This document is an exam for an engineering materials and metallurgy course consisting of 8 questions across 2 pages with instructions for candidates. It covers topics like heat treating wrought iron, phase formation in pure metals, microstructure and properties of pearlite and bainite, diffusion mechanisms, alloy classification, crystal structures, solubility in solid solutions, effects of chromium addition, annealing vs quenching heat treatments, recrystallization, austenitic stainless steels, ferrite types in steel, and case hardening applications. Students are instructed to attempt any 5 questions out of 8, with each question carrying 6 marks. The document also notes any wrongful activity like cheating or sharing materials will be treated under the

Uploaded by

Manoj Kumar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Roll No. Total No.

of Pages : 02
Total No. of Questions : 08
B.Tech. (ME) (Sem.–3 )
ENGINEERING MATERIALS & METALLURGY
Subject Code : BTME-306
M.Code : 59116
Time : 2 Hrs. Max. Marks : 30

INST RUCT IONS T O CANDIDAT ES :


1. Attempt any FIVE question(s), ea ch que stion ca rrie s 6 ma rks .

1. a) Why is it difficult to heat treat or harden wrought iron?


b) Describe in short, the two stages involved in the formation of new phase in pure metals.

2. Distinguish pearlite and bainite in terms of microstructure and mechanical properties.


3. a) Explain the diffusion mechanism involved in the diffusion of impurities such as carbon,
oxygen in metal alloys.
b) Classify the alloying elements of steel according to their effect on matrix.
4. a) Draw a cubic unit cell, and within that cell a (122) plane.
b) Express the relative orientation of Burgers vector and dislocation line for screw
dislocation.
5. a) Discuss the required features of impurity atoms and host atoms that determines their
solubility in substitutional solid solution.
b) Discuss the effect of addition of chromium on properties of steel.
6. Discuss how annealing heat treatment process is different from quenching. Explain in term
of process, microstructure development and mechanical properties.
7. a) Explain how the grain structure of a cold worked metal differs from a metal that is cold
worked and then recrystallized.
b) What are austenitic stainless steels? Also discuss their general properties.
8. a) Explain the difference between proeutectoid and eutectoid ferrite in a hypoeutectoid
steel. Also mention the percentage of carbon in each.

b) How is case hardening process beneficial? Explain with its practical applications.

1 | M- 59116 1124
Note: Any student found attempting answer sheet from any other person(s), using
incriminating material or involved in any wrong activity reported by evaluator shall be
treated under UMC provisions.

Student found sharing the question paper(s)/answer sheet on digital media or with any
other person or any organization/institution shall also be treated under UMC.

Any student found making any change/addition/modification in contents of scanned copy of


answer sheet and original answer sheet, shall be covered under UMC provisions.

2 | M- 59116 1124

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