3. The figure below shows the phase diagram for a hypoeutectoid plain carbon steel. Assume that point c is slightly above 723 °C and point d is slightly below 723 °C. i. Explain the structure at points a, b, c, and d on the diagram. ii. Determine the wt% of proeutectoid ferrite at point c. iii. Determine the wt% of eutectoid ferrite at point d. Temperature (°C) 1000 900 800 y+a 0.02 700 600 500 I 400 I I 0 100% Fe a + Fe, C 0.4 a 723°C y + Fe, C Pearlite 0.8 Weight percent carbon Fe,C 6.67

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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3.
The figure below shows the phase diagram for a hypoeutectoid plain carbon steel.
Assume that point c is slightly above 723 °C and point d is slightly below 723 °C.
i.
ii.
iii.
Explain the structure at points a, b, c, and d on the diagram.
Determine the wt% of proeutectoid ferrite at point c.
Determine the wt% of eutectoid ferrite at point d.
Temperature (°C)
1000
900
800
700
600
500
400
0
100%
Fe
y+ a
0.02
a + Fe, C
b
0.4
723°C
y + Fe, C
Pearlite
0.8
Weight percent carbon
Fe₂C
6.67
Transcribed Image Text:3. The figure below shows the phase diagram for a hypoeutectoid plain carbon steel. Assume that point c is slightly above 723 °C and point d is slightly below 723 °C. i. ii. iii. Explain the structure at points a, b, c, and d on the diagram. Determine the wt% of proeutectoid ferrite at point c. Determine the wt% of eutectoid ferrite at point d. Temperature (°C) 1000 900 800 700 600 500 400 0 100% Fe y+ a 0.02 a + Fe, C b 0.4 723°C y + Fe, C Pearlite 0.8 Weight percent carbon Fe₂C 6.67
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