Question:
The term Pearlite in Fe-C diagram refers to
The term Pearlite in Fe-C diagram refers to
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Pearlite = Layers of Ferrite (soft) and Cementite (hard).
Updated On: Jul 4, 2026
- Martensite + Austenite
- Ferrite + Austenite
- Ferrite + Cementite
- Austenite + Cementite
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The Correct Option is C
Solution and Explanation
Step 1: Concept
In the Iron-Carbon equilibrium diagram, pearlite is a microconstituent that forms during the slow cooling of austenite.
Step 2: Meaning
It is not a single phase but a two-phased, lamellar (layered) structure.
Step 3: Analysis
When austenite of eutectoid composition (0.76% C) cools below $727^{\circ}\text{C}$, it transforms into alternating layers of $\alpha$-ferrite and cementite ($Fe_{3}C$).
Step 4: Conclusion
This specific combination of Ferrite and Cementite is known as pearlite. Final Answer: (C)
In the Iron-Carbon equilibrium diagram, pearlite is a microconstituent that forms during the slow cooling of austenite.
Step 2: Meaning
It is not a single phase but a two-phased, lamellar (layered) structure.
Step 3: Analysis
When austenite of eutectoid composition (0.76% C) cools below $727^{\circ}\text{C}$, it transforms into alternating layers of $\alpha$-ferrite and cementite ($Fe_{3}C$).
Step 4: Conclusion
This specific combination of Ferrite and Cementite is known as pearlite. Final Answer: (C)
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