RECRYSTALLIZATION KINETICS IN COPPER - COMPARISON BETWEEN TECHNIQUES

Six different experimental techniques (electron backscattering (Kikuch i) patterns, calorimetry, micro- and macrohardness, orientation contra st scanning electron microscopy, and neutron diffraction) have been us ed to determine the volume fraction of recrystallized material X(t) in a series of partly recrystallized copper samples. Before recrystalliz ation, the copper samples were cold-rolled to 92 pct reduction in thic kness. The results obtained with the different experimental techniques are compared, and the applicability and accuracy of the six technique s are considered. While five of the techniques reveal the same kinetic s, although with different degrees of accuracy, the texture measuremen ts by neutron diffraction seem to indicate a faster recrystallization process. Finally, the recrystallization kinetics and stored energy asp ects of the copper material are discussed with respect to the Johnson- Mehl-Avrami-Kolmogorov model.