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For a medium carbon steel, having a 0.50% carbon content, slow cooling of austenite will cause austenite to transform to carbide and ferrite. Rapid quenching of austenite can result in:
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- formation of martensite, which produces a very hard and brittle steel
- retention of austenite, even at room temperature which gives a very ductile and tough steel
- formation of large carbide particles near the grain boundaries in the steel, which makes the steel brittle but very tough
- retention of austenite, even at room temperature, which gives a very brittle and hard steel
Correct Option: A
NA
