Q2 (1p) Schematic room temperature microstructuresfor four iron-carbon alloys are shown below. 1- Explain what each microstructure is. (0.4p) 2- Rank these alloy microstructures from most ductile to the least ductile and justify your answer (0.6p) Fe.C

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Q2 (1p)
Schematic room temperature microstructuresfor four iron-carbon alloys are shown below.
1- Explain what each microstructure is. (0.4p)
2- Rank these alloy microstructures from most ductile to the least ductile and justify your
answer (0.6p)
FegC
FegC
FegC
FegC
Fe3C
FegC
(A)
(В)
(C)
(D)
Q3(1p)
Determine values for the constants n and k forthe recrystallization of copper (Figure 10.11) at 119°C.
Write how calculate thos e?
1- y - exp -kt")
100
80
60
135"C 119 C,
113 C/102"c
88°C
43°C
40
20
10
102
101
Time (mir)
(Logarithmic scale)
Feorinted wth permissior trom Metallungical Iranaactions Vol. 188, 1950, a publication of Ire Vetallurgical Society
of AIME. Warrerdale, PA. Adaptec from B. F. Decke and D Harker, 'Recrystallization in Rolled Copper."
Trans. AME 188, 1950 p. 88.
Transcribed Image Text:Q2 (1p) Schematic room temperature microstructuresfor four iron-carbon alloys are shown below. 1- Explain what each microstructure is. (0.4p) 2- Rank these alloy microstructures from most ductile to the least ductile and justify your answer (0.6p) FegC FegC FegC FegC Fe3C FegC (A) (В) (C) (D) Q3(1p) Determine values for the constants n and k forthe recrystallization of copper (Figure 10.11) at 119°C. Write how calculate thos e? 1- y - exp -kt") 100 80 60 135"C 119 C, 113 C/102"c 88°C 43°C 40 20 10 102 101 Time (mir) (Logarithmic scale) Feorinted wth permissior trom Metallungical Iranaactions Vol. 188, 1950, a publication of Ire Vetallurgical Society of AIME. Warrerdale, PA. Adaptec from B. F. Decke and D Harker, 'Recrystallization in Rolled Copper." Trans. AME 188, 1950 p. 88.
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