1. You are given 100 grams of an Fe-C alloy, 0.5 grams of which is C, at a temperature T of 726C. Assuming slow cooling from the melt, determine the mass fraction of proeutectoid ferrite and pearlite?

2. Sketch and label the microstructure of plain carbon steel (Fe-C alloy) for a 1.0 wt% C.

3. For the above problem determine the mass fraction of ferrite and cementite phase?

Use this Fe-C phase diagram if required: Composition (at% C) 10 15 5 20 25 0 1600 [1538C 1493C L 1400 2500 1394C 7+L 1200 1147C 2.14 4.30 7. Austenite 2000 Temperature (C) 1000 Temperature (F) 912C y+ Fezc 800 ta 1500 727C 0.76 600 0.022 a, Ferrite a + Fezc Cementite (Fe3C) 1000 400 0 (Fe) 1 2 5 6 6.70 3 4 Composition (wt% C)