Composition (at% C) 10 15 20 25 1600 1538°C 1493°C L. 1400 2500 1394°C y+L 1200 1147°C 2.14 4.30 Y. Austenite 2000 1000 912°C Y+ Fegc 800 1500 727°C 0.76 0.022 600 a, Ferrite a+ Fezc Cementite (Fe3C) 1000 400 6.70 (Fe) Composition (wt% C) Figure 2: Iron- carbon phase diagram (a) State THREE (3) solubility categories of the phase diagram. (b) By referring to the Iron-Carbon phase diagram in Figure 2: (1) Determine the maximum solubility of carbon in a iron (ferrite) and in y-iron (austenite). (ii) Calculate the percentage of phases (a and y) present at 728°C for 0.5%wt carbon. Temperature ("C) Temperature ("F)

Composition (at% C) 10 15 20 25 1600 1538°C 1493°C L. 1400 2500 1394°C y+L 1200 1147°C 2.14 4.30 Y. Austenite 2000 1000 912°C Y+ Fegc 800 1500 727°C 0.76 0.022 600 a, Ferrite a+ Fezc Cementite (Fe3C) 1000 400 6.70 (Fe) Composition (wt% C) Figure 2: Iron- carbon phase diagram (a) State THREE (3) solubility categories of the phase diagram. (b) By referring to the Iron-Carbon phase diagram in Figure 2: (1) Determine the maximum solubility of carbon in a iron (ferrite) and in y-iron (austenite). (ii) Calculate the percentage of phases (a and y) present at 728°C for 0.5%wt carbon. Temperature ("C) Temperature ("F)

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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In a binary Fe-Fe3C system, what is the transformation that occurs when cooling an austenistic mixture of 2% C by weight from 1100°C to below the eutectoid temperature? What is the microstructure, and how is it formed? What are the concentrations of the total and partial phases? Data: eutectoid temperature: 723 ºC, eutectoid concentration: 0.76% C, limit concentration of ferrite: 0.022%, limit concentration of cementite: 6.7%.
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