TTT diagram indicates time, temperature and transformation of

SOLUTION

Explanation:

• The requirement of TTT diagram arises because the Fe-C diagram does not provide information about the transformation of austenite to any structure other than equilibrium structures nor does it provides any details about the influence of cooling rates on the formation of different structures.
• TTT diagram is a more practical diagram. It graphically describes the cooling rate required for the transformation of austenite to pearlite, bainite or martensite. TTT diagram also gives the temperature at which such transformations take place.