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Unformatted text preview: calculation. 8. The total solidification times of three casting shapes are to be compared: (1) a sphere with diameter = 10 cm, (2) a cylinder with diameter and length both = 10 cm, and (3) a cube with each side = 10 cm. The same casting alloy is used in the three cases. (a) Determine the relative solidification times for each geometry. (b) Based on the results of part (a), which geometric element would make the best riser? (c) If Cm = 3.5 min/cm2 in Chvorinov's Rule, compute the total solidification time for each casting. 9. What is the composition in the center of the casting of a CuNi alloy when cooling along the line in the figure? (Cu rich or Ni rich) Please explain why?...
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 Spring '08
 Chunghorng,R

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