2. The microstructural design of Fe –C alloys has led to the development of a vast range of steels for structural materials applications. The phase diagram provides a means for producing specific microstructure. Using the Fe – C phase diagram, answer the following questions: (a) If a liquid mixture of Fe – 3.0 wt.% C is slowly cooled from 1600 °C to 1200 °C, indicate the phase(s) that are present at 1200 °C and the composition(s) of the phases(s). Sketch the final microstructure that will be obtained. (b) Describe the sequence of all phase transformation that occur if a Fe - 1.5 wt.% C is slowly cooled from 1600 °C to 400 °C. Use diagram to describe the microstructures for each phase transformation. TÇF Iron -carbon phase diagram TC 2802°F (1539'C) 2912 1600 _2719"F (1493'C) 1400 2552°F (1400°C) 0.16% L+Fe3C 4.3% 1200 2097°F (1147"C) 2.06% 2192 Y ACM 1000 Austețite + cementite+ledeburite | Cementite + ledeburite 1832 1670°F (910°C) A3 1472 800 1333°F(723°C) 0.025% - 1112 p.83% A2= 1418°F(770°C) 600 2%3D 752 A1, A2 400 Cementite + pearlite + transformed ledeburite 392 200 FeaC 32 3 6 6.67% Carbon,% Figure Fe - C phase diagram Perlite+ferrrite Perlite+cementite

2. The microstructural design of Fe –C alloys has led to the development of a vast range of steels for structural materials applications. The phase diagram provides a means for producing specific microstructure. Using the Fe – C phase diagram, answer the following questions: (a) If a liquid mixture of Fe – 3.0 wt.% C is slowly cooled from 1600 °C to 1200 °C, indicate the phase(s) that are present at 1200 °C and the composition(s) of the phases(s). Sketch the final microstructure that will be obtained. (b) Describe the sequence of all phase transformation that occur if a Fe - 1.5 wt.% C is slowly cooled from 1600 °C to 400 °C. Use diagram to describe the microstructures for each phase transformation. TÇF Iron -carbon phase diagram TC 2802°F (1539'C) 2912 1600 _2719"F (1493'C) 1400 2552°F (1400°C) 0.16% L+Fe3C 4.3% 1200 2097°F (1147"C) 2.06% 2192 Y ACM 1000 Austețite + cementite+ledeburite | Cementite + ledeburite 1832 1670°F (910°C) A3 1472 800 1333°F(723°C) 0.025% - 1112 p.83% A2= 1418°F(770°C) 600 2%3D 752 A1, A2 400 Cementite + pearlite + transformed ledeburite 392 200 FeaC 32 3 6 6.67% Carbon,% Figure Fe - C phase diagram Perlite+ferrrite Perlite+cementite

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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