The GATE Grind

GATE 2020 ME (ME1) – Question 20

Engineering Materials · Crystal structure of common metals · 1 mark · Multiple choice

The crystal structure of γ iron (austenite phase) is ______.

  1. BCC
  2. FCC
  3. HCP
  4. BCT

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Show answer and explanation

Correct answer: (B) FCC

Explanation

Austenite is the face-centred cubic phase of iron. Ferrite is BCC, while martensite is commonly described as body-centred tetragonal. **Answer: FCC, B.**