Answered: 4b) Figure 6 shows the Fe-Fe3C phase…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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4b) Figure 6 shows the Fe-Fe3C phase diagram. Evaluate

(i) the temperature at which austenite first begins to transform on cooling;
(ii) the primary microconstituent that forms;
(iii) the composition and amount of each phase present at 728°C;
(iv) the composition and amount of each phase present at 726°C;
(v) Sketch the evolution of the microstructures of hypereutectoid steels with 1.1 wt% of carbon during the cooling in relationship to Fe-Fe3C phase diagram shown at 900°C, 800°C and 500°C, respectively.

8+L
1500
L
ô+ y
y+L
L+ Fe;C
2.11
4.3
1000
-Acm
y + Fe;C
(0.77
A1
6.67
727°C
500
0.0218
a+Fe;C
Fe;C
e
6.
3
Weight percent carbon
Temperature ('C)
2.

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