Question: (a) From the curves shown in Figure and using Equation 10.18, determine the rate of recrystallization for pure copper at the several temperatures. (b) Make

(a) From the curves shown in Figure and using Equation 10.18, determine the rate of recrystallization for pure copper at the several temperatures.

(b) Make a plot of ln(rate) versus the reciprocal of temperature (in K???1), and determine the activation energy for this recrystallization process. (See Section 5.5)

100 80 135C/ 119 C 113C 102C 88C 43'C 60 40 20

100 80 135C/ 119 C 113C 102C 88C 43'C 60 40 20 102 104 10 Time (min) (Logarithmic scale) (10.18) rate = fo5

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