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Q. |
Which material is present above the upper critical temperature line in an iron carbon phase diagram? |
A. | martensite |
B. | pearlite |
C. | ledeburite |
D. | austenite |
Answer» D. austenite | |
Explanation: above the upper critical line in a iron carbon phase diagram, all the material is austenite while below the lower critical no austenite material exists. |
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