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Unformatted text preview: lines on either side. Point 3 A tieline is drawn through the point, and the lever rule is applied to identify the proportions of phases present. Intersection of the lines gives compositions C 1 and C 2 as shown. Let C 1 = 58 weight% B and C 2 = 92 weight% B So, fraction of solid β = (65  58) / (92  58) = 20 weight% and fraction of liquid = (92  65) / (92  58) = 80 weight% Point 4 Let C 3 = 48 weight% B and C 4 = 87 weight% B So fraction of solid β = (65  48) / (87  48) = 44 weight%. As the alloy is cooled, more solid β phase forms. At point 4, the remainder of the liquid becomes a eutectic phase of α + β and fraction of eutectic = 56 weight% Point 5 Let C 5 = 9 weight% B and C 6 = 91 weight% B So fraction of solid β = (65  9) / (91  9) = 68 weight% and fraction of solid α = (91  65) / (91  9) = 32 weight%....
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 Spring '09
 Fowler
 Phases Of Matter, Solid solution, Condensed matter physics, Phase transition

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