Question: = Composition = 0 wt% C Composition = 0 at% C Temperature = 400 C C Temperature = 752 F 20 25 = Composition (at%

= Composition = 0 wt% C Composition = 0 at% C

Temperature = 400 C C Temperature = 752 F 20 25 =

= Composition = 0 wt% C Composition = 0 at% C Temperature = 400 C C Temperature = 752 F 20 25 = Composition (at% C) 10 15 5 1600 1538*9493 C C C L 1400 2500 1394 C 7+ 1200 1147 C 2.14 4.30 12000 Temperature (C) 7, Austenite 1000 912 C Temperature (F) 7 + Fe3C 1500 727 C 800 b+y 0.76 600 0.022 ., Feritte 1085 C a - Fec Cementite (Fe,c) 1000 400 1 2 5 6 6.70 (Fe) 3 4 Composition (wt% C) Consider 9.9 kg of austenite containing 0.30 wt% C, cooled to below 727C (1341F). (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form? (c) How many kilograms each of pearlite and the proeutectoid phase form? See Animated Figure 10.28 Part 1 (a) What is the proeutectoid phase? O No proeutectoid phase O Cementite (Fe3C) O Ferrite (a)

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