10.11* The phase diagram of an alloy that has a eutectoid transformation is shown in Figure 10.33. a. Sketch the Gibbs free energy curves for this alloy at T=T. b. Show that the / solvus must enter the / two-phase field (as shown by the arrow). c. Besides T=T, sketch the Gibbs free energy curves for T1,T2,T3, and show how taut string method can be used to construct the phase diagram. Figure 10.33 A eutectoid phase diagram showing the extension of the /y equilibrium curve into the / solvus