(Reference: Chapter 9, Callister)

The average (2.8) student will be able to:

1. define and give examples of the following terms as applied to phase equilibria: component, system (two meanings),solubility limit, phase, microstructure, equilibrium phase diagram.
2. sketch a binary (two-component) isomorphous (100% solid solution) phase diagram and label the regions of the diagram.
3. for an isomorphous system describe the nature of the solid phase or phases and the liquid phase for a given overall composition.
4. determine the composition and amounts of the phases present given an overall composition and temperature point in a two-phase region for an isomorphous binary system.
5. sketch a simple eutectic system with limited solid solubility in the end members (components). Label all fields as to phases present.
6. determine the state of the system at any overall composition-temperature point. The state of the system means what phase(s) is/are present, what are their compositions and amounts.
7. define the following terms relative to phase equilibrium diagrams: congruent melting, incongruent melting, eutectic, peritectic, eutectoid, peritectoid, liquidus, solidus, solvus, intermediate phase or compound, tie line, lever rule.
8. describe in general terms or by simple sketch the microstructure to be expected when the eutectic composition is cooled below the solidus for a simple eutectic system. Similarly, describe the microstructure to be expected for a hypoeutectic or hypereutectic composition.
9. trace a cooling path in a simple eutectic system for any given overall composition citing the phases which appear and disappear. The path of the compositions of liquid and solid phase should be apparent in a sketch or described in text.
10. sketch a simple binary phase equilibrium diagram which shows an intermediate compound which melts congruently. Be able to trace cooling paths for any given overall composition.
11. sketch a simple binary phase equilibrium diagram which shows and intermediate compound or phase which melts incongruently. Be able to trace cooling paths for any given overall composition.
12. write phase reactions for the following invariant points in binary diagrams: eutectic, peritectic, eutectoid, peritectoid. Be sure to indicate the direction of increasing temperature.
13. apply Gibb's Phase Rule to any point in a binary phase equilibrium diagram, excluding the invalid points discussed in lecture.
14. define the following terms with respect to the iron-carbon phase equilibrium diagram: austenite, ferrite, cementite.
15. given the Fe-C phase diagram, identify the following points: maximum solubility of carbon in ferrite, maximum solubility of carbon in austenite, melting point of pure iron, phase transformation of pure iron from ferrite to austenite, eutectoid, eutectic.
16. sketch schematically the microstructure of the following after slow cooling from single-phase austenite to room temperature for eutectoid, hypoeutectoid, and hypereutectic compositions in the Fe-C system.