1. Describe in detail the equilibrium cooling behavior of an Fe-0.1wt%C alloy from 1000C to room...

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1. Describe in detail the equilibrium cooling behavior of an Fe-0.1wt%C alloy from 1000C to room temperature. Your answer should include labeled microstructure drawings at 1000C, 750C, and room temperature. Additionally, calculate the following: a) amount of proeutectoid phase at 850C, 750C, and room temperature b) amount of austenite at 850C, 750C c) amount of pearlite at room temperature Hints: 1. Always draw your tie-lines at the given temperature and extend the tie-line to each closest phase boundary (except at 727C where the phase boundary may be the ferrite, eutectoid/pearlite, or cementite boundary). 2. For room temperature calculations, always go back to the eutectoid temperature. T (C) 1600- The Fe-C Phase Diagram 1539 C 1400--1394C 1200 1000 A a+y 800- Q-TA I Y 0.77% a 600- 0.022 400- 0 0.42 11.15 L Y+L 1148 C Tc 2.11% 727C + a+FeC 4.3% y+FeC 2 3 4 er. 5 P=1 atm L+FeC + 6 6.67 1. Describe in detail the equilibrium cooling behavior of an Fe-0.1wt%C alloy from 1000C to room temperature. Your answer should include labeled microstructure drawings at 1000C, 750C, and room temperature. Additionally, calculate the following: a) amount of proeutectoid phase at 850C, 750C, and room temperature b) amount of austenite at 850C, 750C c) amount of pearlite at room temperature Hints: 1. Always draw your tie-lines at the given temperature and extend the tie-line to each closest phase boundary (except at 727C where the phase boundary may be the ferrite, eutectoid/pearlite, or cementite boundary). 2. For room temperature calculations, always go back to the eutectoid temperature. T (C) 1600- The Fe-C Phase Diagram 1539 C 1400--1394C 1200 1000 A a+y 800- Q-TA I Y 0.77% a 600- 0.022 400- 0 0.42 11.15 L Y+L 1148 C Tc 2.11% 727C + a+FeC 4.3% y+FeC 2 3 4 er. 5 P=1 atm L+FeC + 6 6.67