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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
body-centred cubic stable above 890 o C
hexagonal close-packed stable below 890 o C (c/a = 1.587)
roll-bonded, explosion-clad, loose-lined
Alloying stabilisers Mo, V, W stabilisers Al, O stabilisers (eutectoid) Cu, Mn, Fe, Ni, Co, H
fine hydrides near the surface of cold rolled titatnium. Nippon Steel
needle-like hydrides in zirconium, quenched into iced- brine from 800°C source unknown
Ti - 6Al - 2Sn - 4Zr - 2Mo solution hardening -stabiliser
alloys Ti - 6Al - 4V aluminium reduces density vanadium introduces both solid solution strengthen 1100 MPa, creep resistant at 300°C ductile-brittle transition
burn-resistant alloys Ti - 35V - 15Cr up to 510°C
B. Titanium-based Alloys Titanium is hcp at room temperature – and transform to the bcc structure on heating to 883 o C. Alloying elements are added to.
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