1. In Figure 9.38 is shown the pressure- temperature phase diagram for H2O. Apply the Gibbs phase rule at points A, B, and C; that is, specify the number of degrees of freedom at each of the points-that is, the number of ex- ternally controllable variables that need be specified to completely define the system.
The Iron-Iron Carbide (Fe-Fe3C) Phase Diagram Development of Microstructure in
Iron-Carbon Alloys
2. Compute the mass fractions of a ferrite and cementite in pearlite.
3. (a) What is the distinction between hypoeutectoid and hypereutectoid steels?
(b) In a hypoeutectoid steel, both eutectoid and proeutectoid ferrite exist. Explain the dif- ference between them. What will be the carbon concentration in each?