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.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.2P: 5.2 Evaluate the Prandtl number from the following data: , .
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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.
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