{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

  • 1
    $\begingroup$ Are you familiar with the lever rule or tie line constructions? $\endgroup$ – wwarriner Feb 24 '19 at 5:55
  • $\begingroup$ Pearlite and austenite cannot be in equilibrium together. $\endgroup$ – blacksmith37 Feb 25 '19 at 0:55
  • $\begingroup$ In the paper author also mentioned that effective phase proportion at equilibrium can be calculated by CCT diagram. How? $\endgroup$ – sudheer kumar polamuri Feb 26 '19 at 12:06
  • $\begingroup$ 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. $\endgroup$ – blacksmith37 Feb 26 '19 at 16:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.