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Unformatted text preview: shown in the following figure PROBLEM 5: Pure iron goes through an allotropic transformation from bcc to fcc at approximately 910C. At the transformation temperature, the lattice parameter of bcc iron is 2.863 and the lattice parameter of fcc iron is 3.591 . Calculate the volume change associated with the transformation. Would you expect the material to expand or contract? Hint: Consider the fact that bcc iron has 2 atoms/unit cell, while fcc iron has 4 atoms/unit cell, and that the total number of atoms during the transformation does not change. PROBLEM 6: Determine the relationship between the atomic radius and the lattice parameter in the body centered cubic structure. PROBLEM 7: Determine the Miller indices for the directions A, B, C and D shown in the following cubic unit cell PROBLEM 8: For a cubic unit cell, sketch the following directions a) b) c)...
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- Spring '08