Consider A Steel Alloy Containing 1 0 W T Carbon That Is Cooled To A Temperature Below The Eutectoid Reaction At 725 De 1 (60.91 KiB) Viewed 49 times
Consider A Steel Alloy Containing 1 0 W T Carbon That Is Cooled To A Temperature Below The Eutectoid Reaction At 725 De 2 (50.2 KiB) Viewed 49 times
Consider a steel alloy containing 1.0 w.t% carbon that is cooled to a temperature below the eutectoid reaction at 725 degree Celsius. The Fe-C phase diagram is shown below. Composition (at%C) 10 15 5 20 25 1600 - - 1538°C 1493°C 1400 2500 1394°C y+Z 1200 1147°C 2.14 4.30 7. Austenite 2000 Temperature (°C) Temperature (°F) 1000 912°C ye Fejc 1500 800 727" 0.76 600 0.022 Ferrite Fesc Cementite (Fe3C) 2000 2 5 6 400 0 (Fe) 6.70 3 4 Composition (wt% C)
(a) What is the proeutectoid phase in this alloy? (b) What was the carbon content of the austenite at 726 degree Celsius (carry a unit of wt.%)? (c) What is the average carbon content of the pearlite at 725 degree Celsius? Hint: pearlite transformed from austenite. (c) What is the weight fraction of total ferrite phase in the final microstructure at 725 degree Celsius? Show result with 3 decimal. (d) What is the weight fraction of total cementite in the final microstructure at 725 degree Celsius? Show result with 3 decimal. AM AX
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