Titanium Melts at 1670°C Density 4.51 g cm -3 80% of Ti used in aerospace Use restricted to <...
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Transcript of Titanium Melts at 1670°C Density 4.51 g cm -3 80% of Ti used in aerospace Use restricted to <...
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Titanium
• Melts at 1670°C• Density 4.51 g cm-3
• 80% of Ti used in aerospace• Use restricted to < 400°C
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body-centred cubic stable above 890 oC
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hexagonal close-packed stable below 890 oC (c/a = 1.587)
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titanium heat-exchangers
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roll-bonded, explosion-clad, loose-lined
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Alloying
• stabilisers•Mo, V, W
• stabilisers•Al, O
• stabilisers (eutectoid)•Cu, Mn, Fe, Ni, Co, H
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fine hydrides near the surface of cold rolled titatnium.
Nippon Steel
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needle-like hydrides in zirconium, quenched into iced-brine from 800°C
source unknown
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alloys
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alloys
Ti - 6Al - 2Sn - 4Zr - 2Mo
solution hardening
-stabiliser
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alloys Ti - 6Al - 4V
aluminium reduces density
vanadium introduces
both solid solution strengthen
1100 MPa, creep resistant at 300°C
ductile-brittle transition
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burn-resistant alloys
Ti - 35V - 15Cr
up to 510°C
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quenching from
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