(a) Why is the carbon concentration in austenite (y-Fe) higher than in ferrite (a-Fe)? (b) Determine the volume change accompanied by the transformation of y-Fe (FCC) to a-Fe (BCC) during cooling. Note that the atomic radii for a-Fe, y-Fe, and C are 0.124nm, 0.127mm, and 0.077mm, respectively.

(a) Why is the carbon concentration in austenite (y-Fe) higher than in ferrite (a-Fe)? (b) Determine the volume change accompanied by the transformation of y-Fe (FCC) to a-Fe (BCC) during cooling. Note that the atomic radii for a-Fe, y-Fe, and C are 0.124nm, 0.127mm, and 0.077mm, respectively.

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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Question

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(a) Why is the carbon concentration in austenite (y-Fe) higher than in ferrite (a-Fe)?
(b) Determine the volume change accompanied by the transformation of y-Fe (FCC) to a-Fe
(BCC) during cooling. Note that the atomic radii for a-Fe, y-Fe, and C are 0.124nm,
0.127mm, and 0.077mm, respectively.
(HINT: Because the number of atoms in FCC and BCC differs, consider volume per atom in
the calculation of volume change).

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