Home › Previous year questions › GATE 2023 PI › Question 46GATE 2023 PI – Question 46 General Engineering · Engineering Materials · 2 marks · Multiple choice
According to the Fe–C phase diagram, which microstructure occurs in plain carbon steel with 0.4 wt% carbon at room temperature?
Proeutectoid ferrite and pearlite Proeutectoid cementite and pearlite Ferrite and austenite Austenite and cementite Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (A) Proeutectoid ferrite and pearlite
Explanation At 0.4% C the steel is hypoeutectoid. Ferrite forms before the eutectoid transformation; remaining austenite transforms into pearlite. The room-temperature constituents are **proeutectoid ferrite and pearlite, A**.
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