metallic glass
Post on 14-Jun-2015
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TRANSCRIPT
Material Science
ΔT = 1,000,000 °C / s
• Non-crystalline, amorphous structure
No dislocations
No grain boundaries
• High elastic limit
• High strength
Discovered (1960’s)
California Institute of Technology
William L. Johnson
Atakan Peker
Metals used:
CopperNickel
ZirconiumBerylliumTitanium
• Golf clubs
• Fishing rods
• Car bumpers
• Aircraft skins
• Artificial joints
• Dies
• Cutting tools
• Others
• Small dimensions (due to cooling)
• Raw materials expensive
Approx. from $500 per pound
• Production expensive
HOT SPARKS FLY FROM A NOTCHED SAMPLE OF BULK METALLIC GLASS FRACTURED BY A BLOW FROM A PENDULUM
FRACTURED SURFACE SHOWS EVIDENCE OF LOCAL MELTING
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