In this second example, we increase the amount of carbon and calculate the amount of the different phases forming.

Let's consider a simplified type 347: Fe-18Cr-12Ni-0.2Nb-(0-0.4)C
 0.4 wt%C is much larger than the content of a typical 347.

Settings

• You have to define the system:

  multiphase

  define source sgte_sol sub_sgte plus !

  define system 'Fe,Cr,Ni,Nb,C' !

  class abs p(*) !

  class no p(fcc_a1,CNb,M23C6,M7C3) !

  set temperature 1373 !

• Setting the composition:

  set w 100 !

  set w(2) 18 w(3) 12 w(4) 0.2 !

  Note: If you don't remember the number of the components:

  list system components !

• Stepping carbon:

  step w(5)0.0 0.4 0.01 !

  The step is small and if many phases were present, it would be helpful to reduce it, unless you want to wait half an hour.

Computing

• Starting:

  compute print graphic !

• Setting the carbon content as abscissa and amount of phases as ordinate:

  abscissa mass component(C) !

  ordinate n phase !

  plot go

• Set the y axis limits to area of interest and replot:

  (a+return) ordinate limit 0 4 !

  plot go