a. The composition of the first solid to form; b. The liquidus temperature, solidus temperature, and freesing range of the alloy; c. The amounts and compositions of each phase at 260°C; d. The amounts and compositions of each phase at 183°C; and e. The amounts and compositions of each phase at 25°C

Welding: Principles and Applications (MindTap Course List)
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Chapter26: Welding Metallurgy
Section: Chapter Questions
Problem 12R: What is a eutectic composition?
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Please answer all of the parts from a to e 

11.
Consider a Pb-15% Sn alloy. During solidification, determine
a. The composition of the first solid to form;
b. The liquidus temperature, solidus temperature, and freesing range of the alloy;
c. The amounts and compositions of each phase at 260°C;
d. The amounts and compositions of each phase at 183°C; and
e. The amounts and compositions of each phase at 25°C
Temperature (°C)
400
300-
200
100-
Pb
I
Solidus
19
Liquidus
-Solvus
20
a+L
183°
α + ß
L
61.9
40
60
Weight percent tin
Liquidus
1
L+B
97.5
Solvus-
I
80
Solidus
-B
Sn
Transcribed Image Text:11. Consider a Pb-15% Sn alloy. During solidification, determine a. The composition of the first solid to form; b. The liquidus temperature, solidus temperature, and freesing range of the alloy; c. The amounts and compositions of each phase at 260°C; d. The amounts and compositions of each phase at 183°C; and e. The amounts and compositions of each phase at 25°C Temperature (°C) 400 300- 200 100- Pb I Solidus 19 Liquidus -Solvus 20 a+L 183° α + ß L 61.9 40 60 Weight percent tin Liquidus 1 L+B 97.5 Solvus- I 80 Solidus -B Sn
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