5. (18 Points) Final microstructures estimated by TTT Curve. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (figure below), specify the final microstructure (in terms of microconstituents present and approximate percentages of each) of a specimen that has been subjected to the following time-temperature treatments (1) to (6). In each case assume that the specimen begins at 760C(1033K) and have achieved a complete and homogeneous austenitic structure. (1) Rapid Cooling to 700C, and hold it for 10s, then quench it? (2) Rapid Cooling to 300C, and hold it for 10000s, then quench it? (3) Blue line in figure (4) Black line in figure (5) Red line in figure (6) Dash Navy line in figure 5. (18 Points) Final microstructures estimated by TTT Curve. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (figure below), specify the final microstructure (in terms of microconstituents present and approximate percentages of each) of a specimen that has been subjected to the following time-temperature treatments (1) to (6). In each case assume that the specimen begins at 760C(1033K) and have achieved a complete and homogeneous austenitic structure. (1) Rapid Cooling to 700C, and hold it for 10s, then quench it? (2) Rapid Cooling to 300C, and hold it for 10000s, then quench it? (3) Blue line in figure (4) Black line in figure (5) Red line in figure (6) Dash Navy line in figure