(iv-12 points) What is/are the resultant phase or phases present when a eutectoid steel is first quenched to the 50% line at Ms >T > Mr at a rate faster than the CCR, and then isothermally held for t>104 sec, followed by rapid reheating to TN>T>Mr, held there for 104 sec and then slowly cooled to room temperature. Sketch the heat treatment process on the TTT diagram provided herein. (v-12 points) What are the major characteristics of eutectoid and martensitic transformations in steel? Briefly compare and contrast them.10009 The TTT diagram for a eutectoid Fe-C alloy Eutectoid y (stable) temperature 7270 75% a+Fe, C Y' 25% (metastable) Bainite Temperature( C) 100% Mco .0% 50% ---d'ty- - -100% a' 10-1 1 101 102 103 104 time (s)