Unformatted text preview: (h) Indicate all the directions of the form &lt;110&gt; that lie in the ( 1 plane, of a cubic unit cell. (i) What is the atomic packing fraction? Show that the atomic packing fraction for a bodycentered cubic (bcc) crystal is 0.68 (or 68%) (j) Fe has a bcc crystal structure, with an atomic radius of 0.124 nm and an atomic weight of 55.85 g/mole. Compute the value of its theoretical density. (k) Determine the planar density and packing fraction for Nickel (Ni) in the (100), (110), and (111) planes. On which plane is deformation most likely to happen? Why? (l) Calculate the fraction of atom sites that are vacant for lead at its melting temperature of 600 K. Assume an energy for vacancy formation of 0.55 eV/atom....
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 Spring '10
 MAE20
 68%, 0.124 nm, 600 K, 55.85 g, 700 kJ

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