Answered: Phase Diagrams: You are given the lead…

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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Phase Diagrams: You are given the lead tin (Pb-Sn) phase diagram. Below the eutectic isotherm is identified as the two phase region a + B.

a) At 30wt % Sn, in the circles below draw the microscopic observations evolving at 3000C, 2250C, and 1000C for this hypoeutectic alloy. b) At a temperature just above the isotherm at 1830C, for the 30 wt% Sn Alloy, calculate the fractions of each phase present at equilibrium and the corresponding composition of each phase.

Composition (at% Sn)
20
40
60
80
100
327 C
600
300°C
300
Liquid
500
232 C
a +L
200
B+L
400
183°C
18.3
61.9
97.8
225°C
300
100
a +B
H200
H100
100°C
20
40
60
80
100
(Pb)
Composition (wt% Sn)
(Sn)
Temperature ("C)
Temperature ("F)

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