Cooling of austenite of eutectoid composition at 723^oC results

cooling-of-austenite-of-eutectoid-composition-at-723-oc-results

Cooling of austenite of eutectoid composition at 723^oC results in formation of ________

A. Ledeburite

B. Sphereoidite

C. Pearlite

D. Bainite

The question was asked during an interview.

This interesting question is from Transformation of Steel and Cast Iron topic in chapter Constitution of Alloys and Phase Diagrams of Engineering Material & Metallurgy

Correct option is C. Pearlite

To explain I would say: The eutectic reaction of cast iron occurs at 1148^oC. Below the eutectic temperature, the cast iron consists of austenite crystals and ledeburite. Cooling of this alloy below 723^oC transforms austenite into pearlite.