Question: 5 the dependence of the dendrite arm spacing l on...
5. The dependence of the dendrite arm spacing, l, on the cooling
rate, r, is
given by l = kr-n. l was found to be 100 μm at r = 0.1 K/s and 10 μm at r = 60 K/s. a. Find k and n. b. What rate of cooling would be required to produce a spacing of
l = 1.0mm?