Based on Iron-Carbon diagram, when austenite decomposes during cooling process, an eutectoid mixture is formed. The nature of the element is
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Remember the definition of the eutectoid point on the Iron-Carbon diagram:
- Temperature = 727 $^\circ$C, Carbon = 0.76%.
- $\text{Austenite } (\gamma) \rightarrow \text{Ferrite } (\alpha) + \text{Cementite } (\text{Fe}_3\text{C}) = \textbf{Pearlite}$.
Pearlite is a two-phase microstructural mixture, not a single individual phase.