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Unformatted text preview: β and eutectic microconstituents. (c) Determine the mass fraction of eutectic β . 4. Consider 3.5 kg of austenite containing 0.95 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. 5. For the following pairs of alloys that are coupled in seawater, predict the possibility of corrosion; if corrosion is probable, note which metal/alloy will corrode. (a) Aluminum and cast iron (b) Cadmium and zinc (c) Low-carbon steel and copper Study problems: 1. What is the carbon concentration of an iron–carbon alloy for which the fraction of total cementite is 0.10? 2. Compute the mass fractions of proeutectoid ferrite and pearlite that form in an iron– carbon alloy containing 0.35 wt% C....
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- Spring '10
- 3.5 kg, 425°C, 180°C, 355°F