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Published byDavis Polley Modified over 9 years ago
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2/15/2002, Friday Strengthening Mechanisms
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Strengthening Philosophy Plastic deformation is due to the motion of a large number of dislocations; Strength (resistance to deformation) can be improved by putting obstacles to slip
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Polycrystalline metals vs. single crystals, which one is stronger?
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Dislocation in polycrystalline
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Strengthening by grain size reduction The finer the grains, the larger the area of grain boundaries that impedes dislocation motion.
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Grain growth
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Strain-hardening Ductile metals become stronger when they are deformed plastically.
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Dislocation stress fields
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Dislocation - dislocation interaction
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Chinese ancient sword Chinese Han Dynasty, Bronze Sword, 206BC
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Japanese ancient sword Samurai
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Solid Solution Strengthening
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Precipitation Hardening
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