PART B Answer the Following Questions 1. What would be the differences between Fe-Fe3C and Fe-C phase diagram? 2. Compared to FeFe3C phase diagram, why does eutectic and eutectoid composition will shift left side in Fe-C phase diagram? 3. Which type of cast iron is ductile in comparison to others? Why? 4. Based on the microstructure, explain why grey iron is brittle and weak in tension? 5. How to test grey iron, compacted iron or white cast iron in foundry practice. [other than metallographic technique] 6. Compare grey and malleable cast irons with respect to (a) microstructure and (b) mechanical characteristics