Using the isothermal transformation curve for a Eutectoid steel, determine the final structure of alloy for the following cooling processes

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Using the isothermal transformation curve for a Eutectoid steel, determine the final structure of alloy for the following cooling processes
Using the isothermal transformation curve shown below for a Eutectoid steel, determine the final structure of the alloy for the following cooling processes (assume all
processes start as homogeneous austenite above the eutectoid temperature). Note that the horizontal axis is logarithmic and shows the time in seconds.
(a) Rapidly cool to 400 deg C, hold for 15 minutes, rapidly cool to room temperature
800
Eutectoid temperature
1400
700
H1200
600E
H1000
500-
H800
400
300
H600
Mitart)
200
M.A
400
M150
M190%
100
200
101
10
10
10
10
10
Time (s)
O Ferrite
O Pearlite
O Austenite
O Bainite
O Martensite
Transcribed Image Text:Using the isothermal transformation curve shown below for a Eutectoid steel, determine the final structure of the alloy for the following cooling processes (assume all processes start as homogeneous austenite above the eutectoid temperature). Note that the horizontal axis is logarithmic and shows the time in seconds. (a) Rapidly cool to 400 deg C, hold for 15 minutes, rapidly cool to room temperature 800 Eutectoid temperature 1400 700 H1200 600E H1000 500- H800 400 300 H600 Mitart) 200 M.A 400 M150 M190% 100 200 101 10 10 10 10 10 Time (s) O Ferrite O Pearlite O Austenite O Bainite O Martensite
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