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Examination of transformation time after quenching is done ___________

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Examination of transformation time after quenching is done ___________

(a) At room temperature

(b) Below melting point

(c) Above eutectoid temperature

(d) Above boiling temperature

I had been asked this question in class test.

The query is from Transformation Diagrams topic in section Heat Treatment of Engineering Material & Metallurgy

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The correct choice is (a) At room temperature

To explain I would say: Austenising of the sample is done above eutectoid temperature, whereas quenching is done below the eutectoid temperature. After each transformation time, the microstructure is examined at room temperature and plotted in the form of curves.

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