Mechanical Engineering Exam > Mechanical Engineering Questions > The eutectoid of carbon in iron, above lower ...
Start Learning for Free
The eutectoid of carbon in iron, above lower critical temperature, when cooled, result in
- a)ferrite and austenite
- b)ferrite and cementite
- c)cementite and austenite
- d)ferrite, cementite and austenite
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The eutectoid of carbon in iron, above lower critical temperature, whe...
The correct answer should be the second option - Ferrite and Cementite.
A eutectoid reaction is referred to the phase transformation or change of one solid into two other different solids.
Eutectoid reaction occurs at the eutectoid point of 727°C and 0.77% Carbon, which when cooled gives α-Ferrite and Cementite, also known as Pearlite. Below the critical temperature of 723°C, austenite is no more stable and it gets converted into pearlite.
A eutectoid reaction is referred to the phase transformation or change of one solid into two other different solids.
Eutectoid reaction occurs at the eutectoid point of 727°C and 0.77% Carbon, which when cooled gives α-Ferrite and Cementite, also known as Pearlite. Below the critical temperature of 723°C, austenite is no more stable and it gets converted into pearlite.
Most Upvoted Answer
The eutectoid of carbon in iron, above lower critical temperature, whe...
Explanation:
Eutectoid Reaction:
The eutectoid reaction in iron-carbon alloys occurs above the lower critical temperature when the alloy is cooled. This reaction involves the transformation of austenite into a mixture of ferrite and cementite.
Products of Eutectoid Reaction:
When the eutectoid reaction takes place, the resulting microstructure consists of ferrite and cementite phases. Ferrite is a solid solution of carbon in iron with a BCC crystal structure, while cementite is a compound of iron and carbon with a specific crystal structure.
Formation of Ferrite and Cementite:
During the cooling process, the austenite phase transforms into a mixture of ferrite and cementite through the eutectoid reaction. The carbon atoms redistribute to form cementite in regions of the microstructure, while the remaining iron forms the ferrite phase.
Final Microstructure:
Therefore, the eutectoid reaction results in the formation of ferrite and cementite in the microstructure of the iron-carbon alloy. This microstructure is crucial for the mechanical properties and behavior of the alloy, as the presence of these phases influences its strength, hardness, and other properties.
Conclusion:
In conclusion, the eutectoid reaction of carbon in iron above the lower critical temperature leads to the formation of ferrite and cementite in the alloy's microstructure upon cooling. Understanding this reaction is essential for designing and engineering iron-carbon alloys with specific properties and applications.
Eutectoid Reaction:
The eutectoid reaction in iron-carbon alloys occurs above the lower critical temperature when the alloy is cooled. This reaction involves the transformation of austenite into a mixture of ferrite and cementite.
Products of Eutectoid Reaction:
When the eutectoid reaction takes place, the resulting microstructure consists of ferrite and cementite phases. Ferrite is a solid solution of carbon in iron with a BCC crystal structure, while cementite is a compound of iron and carbon with a specific crystal structure.
Formation of Ferrite and Cementite:
During the cooling process, the austenite phase transforms into a mixture of ferrite and cementite through the eutectoid reaction. The carbon atoms redistribute to form cementite in regions of the microstructure, while the remaining iron forms the ferrite phase.
Final Microstructure:
Therefore, the eutectoid reaction results in the formation of ferrite and cementite in the microstructure of the iron-carbon alloy. This microstructure is crucial for the mechanical properties and behavior of the alloy, as the presence of these phases influences its strength, hardness, and other properties.
Conclusion:
In conclusion, the eutectoid reaction of carbon in iron above the lower critical temperature leads to the formation of ferrite and cementite in the alloy's microstructure upon cooling. Understanding this reaction is essential for designing and engineering iron-carbon alloys with specific properties and applications.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer?
Question Description
The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer?.
The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The eutectoid of carbon in iron, above lower critical temperature, when cooled, result ina)ferrite and austeniteb)ferrite and cementitec)cementite and austenited)ferrite, cementite and austeniteCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup