Recrystallization Theoretical & Practical Aspects - Materials Science ...

Intro
Recrystallization
Lab 1
Grain
Boundaries
Annealing Processes
• Recrystallization is one example of a process that occurs
during annealing of materials. Annealing is simply the
exposure of a material to elevated temperature for a specified
period of time. Various thermally activated processes
occur during annealing that the materials engineer seeks
to control in order to optimize properties.
• Other processes include recovery, grain growth, carburization,
and sintering.
• Recovery is the decrease of dislocation density that occurs by
motion and annihilation of individual dislocations.
• Grain growth is the coarsening of the grain structure by
motion of grain boundaries.
• Carburization is an example of a change of chemical
composition near the surface brought about by the presence of
a high chemical potential for carbon (e.g. by having CO in the
furnace atmosphere) during annealing. This is important in
steels for producing high hardnesses at the surface of a
material.
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