Phase Transformations Assignment 7 1. For an 85 wt% Pb - 15 wt% Mg alloy, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 600°C, 500°C, 270°C, and 200°C. Label all phases and indicate their approximate compositions. Temperature (°C) 700 600 500 400 300 200 100 0 0 0 (Mg) 20 a + L Composition (at % Pb) 40 10 T L a+Mg₂Pb 60 Composition (wt% Pb) 20 1 L M₂Pb M 270°C 200°C 30 40 T Mg₂Pb - 80 1 T → 18₂Pb 70 100 600°C PE 500°C 8 V to 1200 1000 800 600 400 B+ MgPb 200 24 100 (Pb) Temperature (°F)
Phase Transformations Assignment 7 1. For an 85 wt% Pb - 15 wt% Mg alloy, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 600°C, 500°C, 270°C, and 200°C. Label all phases and indicate their approximate compositions. Temperature (°C) 700 600 500 400 300 200 100 0 0 0 (Mg) 20 a + L Composition (at % Pb) 40 10 T L a+Mg₂Pb 60 Composition (wt% Pb) 20 1 L M₂Pb M 270°C 200°C 30 40 T Mg₂Pb - 80 1 T → 18₂Pb 70 100 600°C PE 500°C 8 V to 1200 1000 800 600 400 B+ MgPb 200 24 100 (Pb) Temperature (°F)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Phase Transformations
Assignment 7
1. For an 85 wt% Pb - 15
wt% Mg alloy, make
schematic sketches of the
microstructure that would
be observed for
conditions of very slow
cooling at the following
temperatures: 600°C,
500°C, 270°C, and 200°C.
Label all phases and
indicate their
approximate
compositions.
Temperature (°C)
700
600
500
400
300
200
0
100
0
0
(Mg)
20
5
a + L
Composition (at % Pb)
40
10
T
L
a+Mg₂Pb
60
Composition (wt% Pb)
20
1
L
M₂Pb M
270°C
200°C
30 40
T
Mg₂Pb
-
80
1
T
18₂Pb
+
→
70 100
600°C
8
1200
500°C
to
IN
1000
800
600
400
B+
Mg Pb 200
24
100
(Pb)
Temperature (°F)
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