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The mystery of life is not a problem to be solved, but a reality to be experienced
- Meditations from Buddislamic Text
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Mechanical properties
Tensile testHardnessToughness Fracture toughnessFatigue testCreep resistance
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Tensile test
Yield strengthTensile strengthDuctility
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Tensile test
Yield strengthTensile strengthDuctility
QuickTime™ and aCinepak decompressor
are needed to see this picture.
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Tensile test
Yield strengthTensile strengthDuctility
QuickTime™ and aCinepak decompressor
are needed to see this picture.
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Tensile test
Yield strengthTensile strengthDuctility
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Tensile test
Yield strengthTensile strengthDuctility
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Yield (ksi) Tensile (ksi) Elongation
Steels 30-250 60-250 65-2 %
For metals:
in general, increase strength, decrease ductility
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Yield (ksi) Tensile (ksi) Elongation
Steels 30-250 60-250 65-2 %
Al alloys 5-80 13-90 45-4
Ni alloys 15-170 50-210 60-5
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Yield (ksi) Tensile (ksi) Elongation
Steels 30-250 60-250 65-2 %
Al alloys 5-80 13-90 45-4
Ni alloys 15-170 50-210 60-5
Ceramics - 20-380 0
Ceramics are..........?
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Yield (ksi) Tensile (ksi) Elongation
Steels 30-250 60-250 65-2 %
Al alloys 5-80 13-90 45-4
Ni alloys 15-170 50-210 60-5
Ceramics - 20-380 0
Brittle does not mean weak
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Yield (ksi) Tensile (ksi) Elongation
Steels 30-250 60-250 65-2 %
Al alloys 5-80 13-90 45-4
Ni alloys 15-170 50-210 60-5
Ceramics - 20-380 0
Thermoplastics - 1-12 5-1000
Thermosetting - 5-25 0
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Hardness
Resistance to indentation
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Hardness
Resistance to indentation
Greater hardnessgives higherhardness nos.
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Example - quenched plain carbon steels
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Correlation betwn strength & hardnessHarder means stronger for metals &
alloys
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Toughness
Resistance to being clobbered
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Toughness
Resistance to being clobbered
Impact test measures energy absorbed upon fracture
measure of toughness
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Toughness
Resistance to being clobbered
QuickTime™ and aCinepak decompressor
are needed to see this picture.
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Impact test
measure impact energy at differenttemperatures
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Impact test
measure impact energy at differenttemperatures
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Impact test
measure impact energy at differenttemperatures
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Assignments for next class:
1. review today's classnotes; know tensile test & what data obtained, hardness test, impact test
2. Do problems previously assigned on ANGEL (use Matweb for data)