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12 questions from this quiz
Resistance to scratching & indentation
They become brittle & may shatter
Toughness
Copper and aluminium
Snaps suddenly without warning
Threshold beyond which permanent damage occurs
Best cost-performance balance
Makes them more brittle
kN/mm2\text{kN/mm}^2kN/mm2
Occurs at loads below normal strength
Creep: steady loads; Fatigue: cycles
Concrete: compression; Steel: tension
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