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Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, sketch (mark the microconstituents, eg. a-Fe, Fe,C) and specify the name of the final microstructure (e.g. austenite, pearlite, bainite etc.) of a small specimen that has been subjected to the following time-temperature treatment. In each case assume that the specimen begins at 760 Cand that is has been held at this temperature long enough to have achieved a complete and homogeneous austenite structure. 800 -Eutectoid temperature 1400 700 1200 600 1000 500 800 400 300 600 Mistart) 200 50% 400 ME50%) M90%) 100 200 10 10 10 10 10 10 Time ( eoha ileySons, lnc. Al righta reserved (a) Cool rapidly to 350 S, hold for 10' s, then quench to room temperature (b) Cool rapidly to 665 S, hold for 10's, then quench to room temperature (c) Cool rapidly to 150gin 5 seconds, then cool to room temperature (d) Cool rapidly to 300gin 1 second, then cool to room temperature in 10s (3J anjedueI Temperature F)

Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, sketch (mark the microconstituents, eg. a-Fe, Fe,C) and specify the name of the final microstructure (e.g. austenite, pearlite, bainite etc.) of a small specimen that has been subjected to the following time-temperature treatment. In each case assume that the specimen begins at 760 Cand that is has been held at this temperature long enough to have achieved a complete and homogeneous austenite structure. 800 -Eutectoid temperature 1400 700 1200 600 1000 500 800 400 300 600 Mistart) 200 50% 400 ME50%) M90%) 100 200 10 10 10 10 10 10 Time ( eoha ileySons, lnc. Al righta reserved (a) Cool rapidly to 350 S, hold for 10' s, then quench to room temperature (b) Cool rapidly to 665 S, hold for 10's, then quench to room temperature (c) Cool rapidly to 150gin 5 seconds, then cool to room temperature (d) Cool rapidly to 300gin 1 second, then cool to room temperature in 10s (3J anjedueI Temperature F)

Elements Of Electromagnetics
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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Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, sketch (mark the microconstituents, eg. a-Fe, Fe,C) and specify the name of the final microstructure (e.g. austenite, pearlite, bainite etc.) of a small specimen that has been subjected to the following time-temperature treatment. In each case assume that the specimen begins at 760 Cand that is has been held at this temperature long enough to have achieved a complete and homogeneous austenite structure. 800 -Eutectoid temperature 1400 700 1200 600 1000 500 800 400 300 600 Mistart) 200 50% 400 ME50%) M90%) 100 200 10 10 10 10 10 10 Time ( eoha ileySons, lnc. Al righta reserved (a) Cool rapidly to 350 S, hold for 10' s, then quench to room temperature (b) Cool rapidly to 665 S, hold for 10's, then quench to room temperature (c) Cool rapidly to 150gin 5 seconds, then cool to room temperature (d) Cool rapidly to 300gin 1 second, then cool to room temperature in 10s (3J anjedueI Temperature F)
Transcribed Image Text:Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, sketch (mark the microconstituents, eg. a-Fe, Fe,C) and specify the name of the final microstructure (e.g. austenite, pearlite, bainite etc.) of a small specimen that has been subjected to the following time-temperature treatment. In each case assume that the specimen begins at 760 Cand that is has been held at this temperature long enough to have achieved a complete and homogeneous austenite structure. 800 -Eutectoid temperature 1400 700 1200 600 1000 500 800 400 300 600 Mistart) 200 50% 400 ME50%) M90%) 100 200 10 10 10 10 10 10 Time ( eoha ileySons, lnc. Al righta reserved (a) Cool rapidly to 350 S, hold for 10' s, then quench to room temperature (b) Cool rapidly to 665 S, hold for 10's, then quench to room temperature (c) Cool rapidly to 150gin 5 seconds, then cool to room temperature (d) Cool rapidly to 300gin 1 second, then cool to room temperature in 10s (3J anjedueI Temperature F)
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