KINETICS OF NONISOTHERMAL RECRYSTALLIZATION

The kinetics of recrystallization from nonisothermal cycles is modeled using an extension of the Arrhenius relationship. This model is used to predict the annealing response for both isothermal and nonisotherma l annealing cycles. A nondimensional parameter called the ''annealing index'' is based on time and temperature and is related to the extent of anneal through physical properties. The effect of heating and cooli ng rate also can be quantified because the entire thermal cycle is eva luated. Nonisothermal anneals with heating rates of 10 and 100 degrees C/s were evaluated (along with isothermal anneals) for cold-drawn ETP copper wire. A numerical solution is set forth to evaluate nonisother mal cycles.