How to find phase proportion at equilibrium - from iron-carbon diagram - Leblond

{Equilibrium proportion P, this is the proportion which is reached at a constant temperature after an infinitely long time:P is also the austenite proportion in the case of extremely slow heating. It is determined by the fact that the free enthalpy of the pearlite-austenite mixture is a minimum at the temperature T for this particular proportion P. It can be read from an iron-carbon diagram (incorporating effects of alloying elements).}

above {Equilibrium ....} read from journal paper. My question is how to find P from the iron-carbon diagram?? Explain in detail if possible with example. Thanks

• Are you familiar with the lever rule or tie line constructions? – wwarriner Feb 24 '19 at 5:55
• Pearlite and austenite cannot be in equilibrium together. – blacksmith37 Feb 25 '19 at 0:55
• In the paper author also mentioned that effective phase proportion at equilibrium can be calculated by CCT diagram. How? – sudheer kumar polamuri Feb 26 '19 at 12:06
• In both the IT ( isothermal ) and CCT ( continuous cooling transformation ) diagrams , the phases present depend on the time; so as I understand it -not equilibrium. The phase diagram represents static phases independent of time. – blacksmith37 Feb 26 '19 at 16:38