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Titanium

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 b stable above 890 o C. hexagonal close-packed a stable below 890 o C (c/a = 1.587). titanium heat-exchangers. roll-bonded, explosion-clad, loose-lined.

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Titanium

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  1. Titanium • Melts at 1670°C • Density 4.51 g cm-3 • 80% of Ti used in aerospace • Use restricted to < 400°C

  2. body-centred cubic bstable above 890 oC

  3. hexagonal close-packed astable below 890 oC (c/a = 1.587)

  4. titanium heat-exchangers

  5. roll-bonded, explosion-clad, loose-lined

  6. b stabilisers Mo, V, W a stabilisers Al, O Alloying • b stabilisers (eutectoid) • Cu, Mn, Fe, Ni, Co, H

  7. fine hydrides near the surface of cold rolled titatnium. Nippon Steel

  8. needle-like hydrides in zirconium, quenched into iced-brine from 800°C source unknown

  9. a alloys

  10. a alloys Ti - 6Al - 2Sn - 4Zr - 2Mo b-stabiliser solution hardening

  11. a+b alloys Ti - 6Al - 4V aluminium reduces density vanadium introduces b both solid solution strengthen 1100 MPa, creep resistant at 300°C ductile-brittle transition

  12. burn-resistant alloys Ti - 35V - 15Cr up to 510°C

  13. quenching from b

  14. b -> w

  15. b -> w

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