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A simplified portion of the iron-carbon equilibrium diagram is shown - Leaving Cert Engineering - Question b - 2015
Question b
A simplified portion of the iron-carbon equilibrium diagram is shown. (i) Name the regions A, B, C and D shown. (ii) Describe in detail point X and point Y, with r... show full transcript
Worked Solution & Example Answer:A simplified portion of the iron-carbon equilibrium diagram is shown - Leaving Cert Engineering - Question b - 2015
Step 1
Step 2
Describe point X
Answer
Point X is the Eutectoid point where solid austenite transforms into solid pearlite.
- Phase change: The transition occurs from solid austenite to solid pearlite at this point.
- Composition: The composition at point X contains approximately 0.83% carbon.
- Temperature: The temperature at point X is around 723°C.
Step 3
Describe point Y
Answer
Point Y is another Eutectoid point which describes the phase change of liquid to solid.
- Phase change: It signifies a transformation from liquid to solid state.
- Composition: The composition at point Y consists of approximately 4.3% carbon.
- Temperature: The temperature at point Y is about 1147°C.