& Feathery structure in heat treated steel, in general, confirms the presence of (a) lower bainite (c) massive martensite 9. Carbon martensite is a supersaturated solid solution of carbon in (b) gamma iron (d) alpha iron (a) ferrite (c) austenite (b) upper bainite (d) tempered martensite 10. The martensite formed in carbon steels on quenching is referred to as (a) isothermal martensite (b) athermal martensite (c) strained martensite 11. The c/a ratio for martensite obtained from austenite, fully saturated with carbon, will be about (a) 1.08 (c) 1.32 (b) -1.414 (d) 1.732 12. The c/a ratio for martensite obtained from Bain distortion model is (a) 1.045 (c) 1.080 (b) 1.320 (d) 1.414 13 The growth rate (in mm per second) for martensite transformation is of the order of (a) 10-³ (c) 106 (a) lowering, raising (c) lowering, lowering (b) 103 (d) 10-6 14 For a given steel, M, temperature is independent of cooling rate employed (a) independent (b) dependent 15. Most of the alloying elements lower the M, temperature. However........... raises it (a) silicon (b) copper (c) molybdenum (d) aluminium 16 For a given chemistry of steel. M, temperature is not a fixed temperature. It can be lowered by. cooling rate and carbon content. (b) raising, raising (d) raising, lowering 17. The plane (2 5 9) is a habit plane for...........steels. (a) low carbon (c) high carbon (b) medium carbon (d) all of these 18 When viewed under microscope, etched sample of tempered martensite appears. as compared to etched sample of as quenched martensite (a) light (b) dark 19. My temperature is the highest temperature at which (a) martensite can be deformed easily. (b) martensite will be stable during tempering. (c) none of the above. 20. Strain induced martensite may form under stress at temperatures (a) above M, temperature (b) below M, temperature
& Feathery structure in heat treated steel, in general, confirms the presence of (a) lower bainite (c) massive martensite 9. Carbon martensite is a supersaturated solid solution of carbon in (b) gamma iron (d) alpha iron (a) ferrite (c) austenite (b) upper bainite (d) tempered martensite 10. The martensite formed in carbon steels on quenching is referred to as (a) isothermal martensite (b) athermal martensite (c) strained martensite 11. The c/a ratio for martensite obtained from austenite, fully saturated with carbon, will be about (a) 1.08 (c) 1.32 (b) -1.414 (d) 1.732 12. The c/a ratio for martensite obtained from Bain distortion model is (a) 1.045 (c) 1.080 (b) 1.320 (d) 1.414 13 The growth rate (in mm per second) for martensite transformation is of the order of (a) 10-³ (c) 106 (a) lowering, raising (c) lowering, lowering (b) 103 (d) 10-6 14 For a given steel, M, temperature is independent of cooling rate employed (a) independent (b) dependent 15. Most of the alloying elements lower the M, temperature. However........... raises it (a) silicon (b) copper (c) molybdenum (d) aluminium 16 For a given chemistry of steel. M, temperature is not a fixed temperature. It can be lowered by. cooling rate and carbon content. (b) raising, raising (d) raising, lowering 17. The plane (2 5 9) is a habit plane for...........steels. (a) low carbon (c) high carbon (b) medium carbon (d) all of these 18 When viewed under microscope, etched sample of tempered martensite appears. as compared to etched sample of as quenched martensite (a) light (b) dark 19. My temperature is the highest temperature at which (a) martensite can be deformed easily. (b) martensite will be stable during tempering. (c) none of the above. 20. Strain induced martensite may form under stress at temperatures (a) above M, temperature (b) below M, temperature
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
I need answer within 20 minutes please please with my best wishes
Transcribed Image Text:(a) inferior
(c) better
373
374
Question Bank
& Feathery structure in heat treated steel, in general, confirms the presence of
(a) lower bainite
(b) upper bainite
(c) massive martensite
(d) tempered martensite:
(a) ferrite
(c) austenite
(b) almost similar
9. Carbon martensite is a supersaturated solid solution of carbon in
(b) gamma iron
(d) alpha iron
10. The martensite formed in carbon steels on quenching is referred to as
(a) isothermal martensite
(b) athermal martensite
(c) strained martensite
(a) 1.08
(c) 1.32
11. The c/a ratio for martensite obtained from austenite, fully saturated with carbon, will be
about
(b) -1.414
(d) 1.732
12. The c/a ratio for martensite obtained from Bain distortion model is
(a) 1.045
(c) 1.080
(b) 1.320.
(d) 1.414
13. The growth rate (in mm per second) for martensite transformation is of the order of
(a) 10-3
(c) 106
(b) 10³
(d) 10-5
14 For a given steel, M, temperature is independent of cooling rate employed
(a) independent
(b) dependent
15. Most of the alloying elements lower the M, temperature. However... raises it
(a) silicon
(b) copper
(c) molybdenum
(d) aluminium
16 For a given chemistry of steel. M, temperature is not a fixed temperature. It can be
lowered by
cooling rate and..................carbon content.
(a) lowering, raising
(c) lowering, lowering
17. The plane (2 5 9) is a habit plane for............steels.
(a) low carbon
(c) high carbon
(b) raising, raising
(d) raising, lowering
(b) medium carbon
(d) all of these
18 When viewed under microscope, etched sample of tempered martensite appears................
as compared to etched sample of as quenched martensite
(a) light
(b) dark
19. My temperature is the highest temperature at which
(a) martensite can be deformed easily.
(b) martensite will be stable during tempering
(c) none of the above.
20. Strain induced martensite may form under stress at temperatures
(a) above M, temperature
(b) below M, temperature
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY