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# HW 4 - Which of these elements would you expect to form the...

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EGN3365-Structure and Properties of Materials T Th 8:30-9:45 Instructor: Dr. S. Seal TA: H Bhatt Home-Work 4 Problem 1: Calculate the Atomic Packing Factor of Al2O3 where a = .4759 and c = 1.289. Problem 2: Within the cubic the cubic unit cell, sketch the following direction 1] 101 2]102 3] 211 4] 313 5] 111 6] 312 7] 212 8] 301 Problem 3: Cite the indices of the direction that results from the intersection of each of the following pair of planes within a cubic crystal a] 110 and 111 planes b] 110 and 110 planes c] 111 and 001 planes. elow, atomic radius, crystal structure, electronegativity, and the most common valence are tabulated, for several elements; for those that are nonmetals, only atomic radii are indicated.

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Unformatted text preview: Which of these elements would you expect to form the following with copper: (a) A substitutional solid solution having complete solubility? (b) A substitutional solid solution of incomplete solubility? (c) An interstitial solid solution? Problem 3: (Problem 4.8) What is the composition, in weight percent, of an alloy that consists of 5 at% Cu and 95 at% Pt? Problem 4: (Problem 4.32) For an ASTM grain size of 6, approximately how many grains would there be per square inch at (a) a magnification of 100, and (b) without any magnification...
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