Determine the resulting microstructure for 0.8% carbon steel if the steel cooled from the y region to 280°C within 5 seconds. If the resulting microstructure in Question 6b (i) above is reheat to 300°C minute and hold for 1 hour at remain temperature, then and then rapidly to room temperature, determine its final microstructure.
Determine the resulting microstructure for 0.8% carbon steel if the steel cooled from the y region to 280°C within 5 seconds. If the resulting microstructure in Question 6b (i) above is reheat to 300°C minute and hold for 1 hour at remain temperature, then and then rapidly to room temperature, determine its final microstructure.
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
Related questions
Question
![°C
800
"27ר
700
Coarse pearlite
600
a+ Fe,C
Fine pearlite
00
+a+ Fe, C
400
Bainite
300
Ms
200
Mso
100
I sec
I min
hour
I day
of
0.1
10
102
10
104
105
Time, seconds
APPENDIX A](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F459f935c-cb9a-4248-ab91-20bd097f085f%2Fc5670cb9-3ab0-4a76-9d8a-78ee50e3c5bb%2F14iw1ef_processed.jpeg&w=3840&q=75)
Transcribed Image Text:°C
800
"27ר
700
Coarse pearlite
600
a+ Fe,C
Fine pearlite
00
+a+ Fe, C
400
Bainite
300
Ms
200
Mso
100
I sec
I min
hour
I day
of
0.1
10
102
10
104
105
Time, seconds
APPENDIX A
![Refer to the Time Temperature Transformation (TTT) diagram given in Appendix A:
(i) Determine the resulting microstructure for 0.8% carbon steel if the steel is rapidly
cooled from the y region to 280°C within 5 seconds.
(i) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1
minute and hold for 1 hour at remain temperature, then and then rapidly quenched
to room temperature, determine its final microstructure.
(ii) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1
minute and hold for 16 minutes at remain temperature, then and then rapidly
quenched to room temperature, determine its final microstructure.
(iv) Arrange the mircostructures 6 (b) (i,i and i) from the lowest to the highest
hardnes value.
(v) Sketch the thermal history from Question 6b (i) to (ii) on a TTT diagram.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F459f935c-cb9a-4248-ab91-20bd097f085f%2Fc5670cb9-3ab0-4a76-9d8a-78ee50e3c5bb%2Fkh8m3xh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Refer to the Time Temperature Transformation (TTT) diagram given in Appendix A:
(i) Determine the resulting microstructure for 0.8% carbon steel if the steel is rapidly
cooled from the y region to 280°C within 5 seconds.
(i) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1
minute and hold for 1 hour at remain temperature, then and then rapidly quenched
to room temperature, determine its final microstructure.
(ii) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1
minute and hold for 16 minutes at remain temperature, then and then rapidly
quenched to room temperature, determine its final microstructure.
(iv) Arrange the mircostructures 6 (b) (i,i and i) from the lowest to the highest
hardnes value.
(v) Sketch the thermal history from Question 6b (i) to (ii) on a TTT diagram.
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