Consider 1.2 kg of a 99.6 wt% Fe-0.4 wt% C alloy that is cooled to a temperature just below the eutectoid. The iron-iron carbide phase diagram is shown in the Animated Figure 9.24. (a) How many kilograms of proeutectoid ferrite form? i kg (b) How many kilograms of eutectoid ferrite form? i kg (c) How many kilograms of cementite form? i kg

Elements Of Electromagnetics
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Consider 1.2 kg of a 99.6 wt% Fe-0.4 wt% C alloy that is cooled to a temperature just below the eutectoid. The iron-iron carbide
phase diagram is shown in the Animated Figure 9.24.
(a) How many kilograms of proeutectoid ferrite form?
i
kg
(b) How many kilograms of eutectoid ferrite form?
i
kg
(c) How many kilograms of cementite form?
i
kg
Transcribed Image Text:Consider 1.2 kg of a 99.6 wt% Fe-0.4 wt% C alloy that is cooled to a temperature just below the eutectoid. The iron-iron carbide phase diagram is shown in the Animated Figure 9.24. (a) How many kilograms of proeutectoid ferrite form? i kg (b) How many kilograms of eutectoid ferrite form? i kg (c) How many kilograms of cementite form? i kg
|Composition
Composition = 0 at% C
Temperature = 400 °C
Temperature = 752 °F
= 0 wt% C
Composition (at% C)
%3D
10
15
20
25
1600
1538 °C
1493 °C
L
1400
2500
1394 °C
y +L
1200
1147 °C
2.14
4.30
|2000
» Austenite
1000
912 °C
y + FE3C
800
1500
727 °C
a+y
0.76
0.022
600
&, Feritte
a+ FeC
1085 °C
Cementite (Fe,C)
+1000
400
1
3
4
6.
6.70
(Fe)
Composition (wt% C)
Temperature (°C)
Temperature (°F)
Transcribed Image Text:|Composition Composition = 0 at% C Temperature = 400 °C Temperature = 752 °F = 0 wt% C Composition (at% C) %3D 10 15 20 25 1600 1538 °C 1493 °C L 1400 2500 1394 °C y +L 1200 1147 °C 2.14 4.30 |2000 » Austenite 1000 912 °C y + FE3C 800 1500 727 °C a+y 0.76 0.022 600 &, Feritte a+ FeC 1085 °C Cementite (Fe,C) +1000 400 1 3 4 6. 6.70 (Fe) Composition (wt% C) Temperature (°C) Temperature (°F)
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