Using the FeFeyC phase diagram for following problems 610 16

Using the Fe-FeyC phase diagram, for following problems (6-10) 1600 10 1493 1400 -2500 1394 C 1200 1147 2.14 4.30 y Austenite 2000 1000 912 C 1500 0.76 0.022 600 a, Ferrite a Fe3C cementite (Fe3C) 1000 400 6 6.70 Composition (wt% c) (Fe)

At 727 C, the maximum transformation of the Austenite to ferrite is just 77%, hence the given mass fractions cannot exist due to solubility limitations of the ferrite and carbon composiitons.