Question 4. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (below), sketch and label time-temperature paths on this diagram to produce the following microstructures: (a) 100% fine pearlite (b) 100% tempered martensite (c) 50% coarse pearlite, 25% bainite, and 25% martensite 800 Eutectoid temperature 1400 700 1200 600 1000 500 (4.)

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Question 4. Using the isothermal transformation diagram for an
iron-carbon alloy of eutectoid composition (below), sketch and
label time-temperature paths on this diagram to produce the
following microstructures:
(a) 100% fine pearlite
(b) 100% tempered martensite
(c) 50% coarse pearlite, 25% bainite, and 25% martensite
800
Eutectoid temperature
1400
700
1200
600
1000
500
800
400
A
600
300
M (start)
200
M +A
50%
400
М (50%)
м (90%)
100
200
10-1
1
10
102
103
104
105
Time (s)
Temperature (°C)
Temperature ("F)
Transcribed Image Text:Question 4. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (below), sketch and label time-temperature paths on this diagram to produce the following microstructures: (a) 100% fine pearlite (b) 100% tempered martensite (c) 50% coarse pearlite, 25% bainite, and 25% martensite 800 Eutectoid temperature 1400 700 1200 600 1000 500 800 400 A 600 300 M (start) 200 M +A 50% 400 М (50%) м (90%) 100 200 10-1 1 10 102 103 104 105 Time (s) Temperature (°C) Temperature ("F)
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