The GATE Grind

GATE 2024 ME – Question 28

Engineering Materials · Phase diagrams and heat treatment · 1 mark · Multiple choice

The phases present in pearlite are

  1. austenite and ferrite
  2. cementite and austenite
  3. ferrite and cementite
  4. martensite and ferrite

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Show answer and explanation

Correct answer: (C) ferrite and cementite

Explanation

Pearlite is the eutectoid product of austenite on slow cooling at 0.76 % carbon. It is a lamellar mixture of two phases, ferrite (nearly pure iron) and cementite ($Fe_3C$).