An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C: a) Is this alloy hypoeutectic or hypereutectic? b) What is the composition of the first solid to form? c) What are the amounts and compositions of each phase that is present at 183°C + ∆T ? d) What is the amount and composition of each phase that is present at 183°C - ∆T ? e) What are the amounts of each phase present at room temperature? f) Draw the microstructure 183°C + ∆T and 183°C - ∆T in 2 cm diameter circle.
An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C: a) Is this alloy hypoeutectic or hypereutectic? b) What is the composition of the first solid to form? c) What are the amounts and compositions of each phase that is present at 183°C + ∆T ? d) What is the amount and composition of each phase that is present at 183°C - ∆T ? e) What are the amounts of each phase present at room temperature? f) Draw the microstructure 183°C + ∆T and 183°C - ∆T in 2 cm diameter circle.
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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Question
An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C:
a) Is this alloy hypoeutectic or hypereutectic?
b) What is the composition of the first solid to form?
c) What are the amounts and compositions of each phase that is present at 183°C + ∆T ?
d) What is the amount and composition of each phase that is present at 183°C - ∆T ?
e) What are the amounts of each phase present at room temperature?
f) Draw the microstructure 183°C + ∆T and 183°C - ∆T in 2 cm diameter circle.
![327
Solidus
Liquidus
300-
Liquid
Liquidus
250
a + liquid
Solidus
200
B+ liquid
183
150
Eutectic point
Solvus
a +B
100
Solvus
50
19.2
40.0
61.9
97.5
40 50 60
Weight percent tin
10
20
30
70 80
90
100%
100%
Sn
Temperature (C)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2302c526-9755-4035-b569-0a02cd47add7%2Fce404769-5a6d-46f7-8ae1-4c0cce311dd0%2F74agorq_processed.png&w=3840&q=75)
Transcribed Image Text:327
Solidus
Liquidus
300-
Liquid
Liquidus
250
a + liquid
Solidus
200
B+ liquid
183
150
Eutectic point
Solvus
a +B
100
Solvus
50
19.2
40.0
61.9
97.5
40 50 60
Weight percent tin
10
20
30
70 80
90
100%
100%
Sn
Temperature (C)
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