(Solved): The next questions are based on the Iron-Carbon Phase Diagram (partial diagram is first, and then ...

The next questions are based on the Iron-Carbon Phase Diagram (partial diagram is first, and then full Niagram) 12. Consider \( 3 \mathrm{Kg} \) of a \( 99.7 \mathrm{wt} \% \mathrm{Fe} 0.03 \mathrm{wt} \% \mathrm{C} \) alloy cooled to a temperature just below the eutectoid point. a) How many kg of proeutectoid ferrite are formed? b) How many kg of eutectoid ferrite form? c) How many kg of cementite form? 13. Compute the mass fraction of eutectoid cementite in an iron-carbon alloy which contains \( 0.97 \) wt \( \% \). 14-18. Sketch the picture of the microstructure at each of the blue dots on the simple plot. 19. In terms of heat treatment and development of microstructure, what are the two major limitations of the iron-iron carbide phase diagram. 20. If you started with \( 0.76 \) wt \( \% \mathrm{C} \) steel how might you heat treat the material from pearlite structure to a bainite structure (if it can be done).