Nevertheless, crystals of annealed thin films for α and γ phases are
almost analogous in size. In addition, the growth rate of crystal size is
greater for γ-phase compared with that of α-phase when thin films
are annealed at 500 °C. Therefore, annealing those stainless steel thin
films causes nonlinear growth of crystal size for both α and γ crystals.
The obtained results demonstrate that α → γ phase transformation is
produced by the recrystallization phenomena (germination and germ
growth) with temporal evolution at each annealing temperature
which is given by the Johnson–Mehl–Avrami (JMA) law