1
Q
No change in either the number or composition
of the phases present
A
Simple Diffusion-Dependent Transformations
2
Q
E.g. Solidification of a pure metal, recrystallization and grain growth
A
Simple Diffusion-Dependent Transformations
3
Q
Some alteration in phase composition and often the number of phases present
A
Diffusion Dependent Transformations
4
Q
E.g. Eutectoid reaction; final microstructure normally contains two phases
A
Diffusion Dependent Transformations
5
Q
A metastable phase is produced
A
Diffusionless Transformation
6
Q
E.g. Martensitic transformation in steel alloys
A
Diffusionless Transformation
