Recrystallization Theoretical & Practical Aspects - Materials Science ...

Intro
Recrystallization
Lab 1
Grain
Boundaries
Recrystallization Characteristics
• In order for the boundary between a new grain (nucleus) and
the deformed material to be able to move, it must be a high
angle boundary. This is a consequence of the properties of
boundaries, to be described later.
• The requirement that new grains have high angle boundaries
means that the final grain size and the rate at which
recrystallization takes place is highly dependent on the strain
level.
• Higher strains mean greater lattice rotations (from dislocation
slip) inside grains and higher stored energies. Therefore the
probability of generating new grains increases with strain and
the driving force increases.
• Increasing probability for nucleation translates directly into
increased density of nuclei and therefore smaller recrystallized
grain size.
8