Topic: Material Science
An eutectoid steel consists of
- A. Wholly pearlite
- B. Wholly austenite
- C. Pearlite and ferrite
- D. Pearlite and cementite
Answer: A. Wholly pearlite
Explanation: At the exact eutectoid point (727 C and 0.8% Carbon content), austenite undergoes a complete solid-state decomposition reaction to form 100% pearlite. Pearlite itself is defined as an eutectoid microstructural mixture consisting of alternating layers of ferrite and cementite.