Question

With reduction in carbon content, hardness of martensitic structure will

 1. Increase

 2. Increase first then decrease

 3. Decrease

 4. Decrease first then increase

​

Answer 1

increase is 5ha anwer

Answer 2

Answer:

3. Decrease

Explanation:

Carbon is used as a very important commercial alloy which improves hardenability and increases strength. In martensite, the hardness and strength increase as the number of carbon atoms increases between the spaces of iron atoms.

Generally, acicular martensite transforms from lath martensite with the increase of carbon supersaturation and makes it harder.  

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