2/15/2002, friday strengthening mechanisms. strengthening philosophy plastic deformation is due to...
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2/15/2002, Friday
Strengthening Mechanisms
Strengthening Philosophy
Plastic deformation is due to the motion of alarge number of dislocations;
Strength (resistance to deformation) can be improved by putting obstacles to slip
Polycrystalline metalsvs.
single crystals,which one is stronger?
Dislocation in polycrystalline
Strengthening by grain size reduction
The finer the grains, the larger the area of grain boundaries that impedes dislocation motion.
Grain growth
Strain-hardening
Ductile metals become stronger when they are deformed plastically.
Dislocation stress fields
Dislocation - dislocation interaction
Chinese ancient sword
Chinese Han Dynasty, Bronze Sword, 206BC
Japanese ancient sword
Samurai
Solid Solution Strengthening
Precipitation Hardening
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