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Consider the following temperature ranges:
1. Room temperature
2. 0 to 910°C
3. 910°C to 1400oC
4. 1400oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe3C phase diagram?
1. Room temperature
2. 0 to 910°C
3. 910°C to 1400oC
4. 1400oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe3C phase diagram?
- a)1, 2 and 4
- b)2, 3 and 4
- c)1 and 3
- d)2 and 3
Correct answer is option 'A'. Can you explain this answer?
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Consider the following temperature ranges:1. Room temperature2. 0 to 9...
Ans. (a)
Most Upvoted Answer
Consider the following temperature ranges:1. Room temperature2. 0 to 9...
Explanation:
In the Fe-Fe3C phase diagram, ferrite (α-Fe) refers to the solid solution of carbon in iron with a body-centered cubic (BCC) crystal structure. Let's analyze each temperature range and determine if ferrite is present.
1. Room temperature:
At room temperature, the Fe-Fe3C phase diagram indicates the presence of ferrite. This is because ferrite exists below the eutectoid temperature, which is around 727oC in the Fe-Fe3C phase diagram. Therefore, ferrite is present at temperatures below 727oC, including room temperature.
2. 0 to 910oC:
In this temperature range, ferrite is not indicated in the Fe-Fe3C phase diagram. Instead, the phase diagram shows the presence of austenite (γ-Fe), which has a face-centered cubic (FCC) crystal structure. Austenite is stable at temperatures above the eutectoid temperature (around 727oC) and up to the A3 transformation temperature (around 910oC).
3. 910oC to 1400oC:
In this temperature range, ferrite is indicated in the Fe-Fe3C phase diagram. Above the A3 transformation temperature (around 910oC), ferrite undergoes a phase transformation into austenite. However, below the A3 temperature and above the Acm temperature (around 723oC), ferrite can coexist with austenite. Therefore, ferrite is present in this temperature range.
4. 1400oC to below melting point:
At temperatures above 1400oC, the Fe-Fe3C phase diagram indicates the presence of liquid iron (molten state). Ferrite does not exist at these high temperatures as it has transformed into austenite. Therefore, ferrite is not indicated in this temperature range.
Therefore, based on the above analysis, ferrite with a body-centered cubic structure is indicated in temperature ranges 1, 2, and 4 of the Fe-Fe3C phase diagram.
In the Fe-Fe3C phase diagram, ferrite (α-Fe) refers to the solid solution of carbon in iron with a body-centered cubic (BCC) crystal structure. Let's analyze each temperature range and determine if ferrite is present.
1. Room temperature:
At room temperature, the Fe-Fe3C phase diagram indicates the presence of ferrite. This is because ferrite exists below the eutectoid temperature, which is around 727oC in the Fe-Fe3C phase diagram. Therefore, ferrite is present at temperatures below 727oC, including room temperature.
2. 0 to 910oC:
In this temperature range, ferrite is not indicated in the Fe-Fe3C phase diagram. Instead, the phase diagram shows the presence of austenite (γ-Fe), which has a face-centered cubic (FCC) crystal structure. Austenite is stable at temperatures above the eutectoid temperature (around 727oC) and up to the A3 transformation temperature (around 910oC).
3. 910oC to 1400oC:
In this temperature range, ferrite is indicated in the Fe-Fe3C phase diagram. Above the A3 transformation temperature (around 910oC), ferrite undergoes a phase transformation into austenite. However, below the A3 temperature and above the Acm temperature (around 723oC), ferrite can coexist with austenite. Therefore, ferrite is present in this temperature range.
4. 1400oC to below melting point:
At temperatures above 1400oC, the Fe-Fe3C phase diagram indicates the presence of liquid iron (molten state). Ferrite does not exist at these high temperatures as it has transformed into austenite. Therefore, ferrite is not indicated in this temperature range.
Therefore, based on the above analysis, ferrite with a body-centered cubic structure is indicated in temperature ranges 1, 2, and 4 of the Fe-Fe3C phase diagram.
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Consider the following temperature ranges:1. Room temperature2. 0 to 910°C3. 910°C to 1400oC4. 1400oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe3C phase diagram?a)1, 2 and 4b)2, 3 and 4c)1 and 3d)2 and 3Correct answer is option 'A'. Can you explain this answer?
Question Description
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