

Isothermal
Transformations
· Following
a phase transition as a function of time at selected transformation temperatures
gives curves of the form shown. · A
given transformationtime curve can be described by the Avrami
equation: y
= {1  exp(Kt^{n})}, where K, and n are constants · The transformation rate, r(T),
can be characterized by the 50% transformation point t_{0.5}:
r(T)
= (1/ t_{0.5 })











