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Unformatted text preview: ecrystallized structure. Recrystallization of Cold Worked Metals Recrystallization Kinetics in Al Structure-Property Relationship via Annealing Figure 6.6 FACTORS AFFECTING RECRYSTALLIZATION
1. Prior deformation
4. Initial grain size
5. Alloy composition GRAIN GROWTH
Grains grow in order to reduce
surface energy in the structure.
Higher temperatures and longer
times increase grain size until
equilibrium size is reached. HIGH TEMPERATURES
Increase grain size
Decrease grain boundary area
Grain boundaries are weaker than grains, therefore
less grain boundaries increase strength
(at low temperatures more grain
boundaries increase strength)
Coarse grain material needed for high temperature
strength ELEVATED TEMPERATURE IS
Internal combustion engines
Chemical processing equipment
High temperature pressure lines and vessels
High speed cutting tools
Compressors HIGH TEMPERATURE IS A RELATIVE TERM...
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This document was uploaded on 02/27/2014 for the course NANO 108 at UCSD.
- Fall '13