Question 5 (12 marks) Referring to the Fe-C phase diagram given below, suppose an austenite having a carbon content of 0.25% is gradually cooled to Teutectoid+dT. a. What are the phases appearing? Draw a microstructure to illustrate it. b. If this mixture is further cooled to Teutectoid-dT, what is the wt.% of cementite formed? Temperature (°C) 1600 & 1400 1200 1000 800 a 600 400 200 Y+8 L+8 y austenite 0% C 100% Fe Y 0.02 0.8 1 L+y 2.0 Liquat y + Fe, C 723°C Fe,C 43 2 3 4 Weight percent carbon L+ Fe C 11-48°C 5 Fe, C 6 6.67 Fe, C

Question 5 (12 marks) Referring to the Fe-C phase diagram given below, suppose an austenite having a carbon content of 0.25% is gradually cooled to Teutectoid+dT. a. What are the phases appearing? Draw a microstructure to illustrate it. b. If this mixture is further cooled to Teutectoid-dT, what is the wt.% of cementite formed? Temperature (°C) 1600 & 1400 1200 1000 800 a 600 400 200 Y+8 L+8 y austenite 0% C 100% Fe Y 0.02 0.8 1 L+y 2.0 Liquat y + Fe, C 723°C Fe,C 43 2 3 4 Weight percent carbon L+ Fe C 11-48°C 5 Fe, C 6 6.67 Fe, C

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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