Analysis of the Rate of Recovery and Recrystallization in Pure Aluminum by a New Rate Equation

Abstract

A new rate equation developed by Yamamoto was applied to the rate of recovery and recrystallization in pure aluminum. The entire reaction can be expressed by Yamamoto’s equation because it contains the term of particle number. By applying this equation, the entire reaction process was divided into two reactions, the recovery and recrystallization. The obtained values of the time-exponent are 0.5 in the former and 1 in the latter regardless of the soaking conditions and annealing temperatures. Based on the microstructures and time-exponents, it is concluded that the rate of recovery and recrystallization is controlled by the precipitation of silicon on the dislocation cell boundaries during the recovery process and the precipitation of iron on the subgrain boundaries during the recrystallization one.