3/20/2002, Wednesday Toughening Mechanisms Microstructure

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3/20/2002, WednesdayToughening
MechanismsMicrostructure
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Size of Plastic Zone
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Bridging Toughening
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Crack Deflection
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Surface Roughness
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Clinched Rough Surface
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Crack Meandering
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TEM Image
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Nanoscale Composite Ceramic
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Fracture Pattern
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Ceramic Composite
Microcrack nucleation and coalescence along
interface
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Mocrovoid
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Strength vs. Toughness
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Microvoids coalesce