What is the proeutectoid phase for an iron-carbon alloy in which the mass fractions of total ferrite and total cementite are 0.92 and 0.08, respectively? Why? Consider 1.0 kg of austenite containing 1.15 wt% C, cooled to below 727°C (1341°F). (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form? (c) How many kilograms each of pearlite and the proeutectoid phase form? (d) Schematically sketch and label the resulting microstructure.
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In an iron-carbon alloy, the proeutectoid phase can be either ferrite (α) or cementite (Fe3C), depending on the carbon content. In this case, since the mass fraction of total ferrite is 0.92 and total cementite is 0.08, the proeutectoid phase is ferrite (α) Show more…
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Consider 1.0 kg of austenite containing 1.15 wt% C, cooled to below 727°C (1341°F). (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form? (c) How many kilograms each of pearlite and the proeutectoid phase form? (d) Schematically sketch and label the resulting microstructure.
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