1) Using below given information construct the unary (one component) phase diagram of iron. At 1 atm pressure, when heated, pure iron experiences two polymorphic changes in its crystal structure...

Extracted text: 1) Using below given information construct the unary (one component) phase diagram of iron. At 1 atm pressure, when heated, pure iron experiences two polymorphic changes in its crystal structure before it reaches its melting temperature: At room temperature, iron exists as ferrite (a iron) and has a BCC structure. Ferrite experiences a polymorphic transformation to FCC austenite (y iron) at 912°C. Experiences a second transformation to BCC phase known as ô ferrite at 1394°C, which finally melts at 1538°C. There are 5 phases in the system: dfe, YFe, OFe, liquid, gas Relative densities of phases are given as follows: pafe>PYFE>pÖFe> Pliquid> Pgas Equilibrium points in the system are: AFe + YFe + gas YFe + OFe + gas dFe + liquid + gas