Aluminum recrystallizes per the Avrami equation with a k-value of 6.0 x 10^-8 (with time in minutes). One measurement shows that 75% is transformed after 200 minutes (that is, the fraction is 0.75). What is the time to 50% transformation and the rate of this reaction?
The kinetics of the austenite-to-pearlite transformation also obey the Avrami equation. Use the data shown below to calculate the time required for 95% transformation:
20% transformed at 12.6 seconds
80% transformed at 28.2 seconds.