权利要求：
Claims
1. Atitanium-based alloy composition consisting in weight percent, of. between
4.0 and 8.0 % aluminium, between 3.0 and 9.0% tin, between 0.0 and 5.0%
zirconium, between 0.0 and 2.0% niobium, between 0.0 and 2.0% vanadium,
between 0.0 and 0.5% iron, between 0.0 and 1.75% chromium, between 0.0
and 2.0% molybdenum, between 0.0 and 0.5 % nickel, between 0.0 and 0.5
% tantalum, between 0.0 and 0.5% cobalt, between 0.0 and 0.75% silicon,
between 0.0 and 0.5% boron, between 0.0 and 0.5% calcium, between 0.0
and 0.5% carbon, between 0.0 and 0.5% manganese, between 0.0 and .0.5
hafnium, the balance being titanium and incidental impurities which satisfies
the following relationship:
0.107Al + 0.075V + 0.4Fe + 0.112Cr + 0.025Zr + 0.05Mo + 0.082Nb + 0.027Sn >
10
where Al, V, Fe, Cr, Zr, Mo, Nb and Sn represent the amounts of aluminium, vanadium, iron, chromium, zirconium, molybdenum, niobium and tin in wt.% respectively.
2. The titanium-based alloy composition of claim 1, consisting of 1.75% or less
molybdenum, preferably 1.5% or less, more preferably 1.25% or less
molybdenum, even more preferably 1.0% or less molybdenum.
3. The titanium-based alloy composition of claim 1 or 2, consisting of 0.5% or
more molybdenum, preferably 0.6% or more molybdenum, more preferably
0.75% or more molybdenum.
4. The titanium-based alloy composition of claim 1, 2 or 3, which satisfies the
following equation
7.0 < Alwt.% + zSnwt.% +3 Zr wt.% < 10.0 preferably
1 1 7.0 < Alwt.% + Sn wt. % +eZrwt % <9.0
where Al, Sn and Zr represent the amounts of aluminium, tin and
zirconium in wt % respectively.
5. The titanium-based alloy composition of any of claims 1 to 4, consisting of
8.5% or less tin, preferably 8.0% or less tin, more preferably 7.5% or less tin.
6. The titanium-based alloy composition of any of claims 1 to 5, consisting of
5.5% or more tin, preferably 6.0% or more tin.
7. The titanium-based alloy composition of any of claims 1 to 6, consisting of
4.5% or less zirconium, preferably 4.0% or less zirconium, more preferably
3.5% or less zirconium.
8. The titanium-based alloy composition of any of claims 1 to 7, consisting of
1.0% or more zirconium, preferably 1.5% or more zirconium, more preferably
2.0% or more zirconium.
9. The titanium-based alloy composition of any of claims 1 to 8, consisting of
1.75% or less vanadium, preferably 1.5% or less vanadium, more preferably
1.25% or less vanadium, even more preferably 1.0% or less vanadium.
10. The titanium-based alloy composition of any of claims 1 to 9, consisting of
0.5% or more vanadium, preferably 0.75% or more vanadium, more
preferably 1.0% or more vanadium.
11. The titanium-based alloy composition of any of claims 1 to 10, consisting of
0.25% or less iron, preferably 0.15% or less iron.
12. The titanium-based alloy composition of any of claims 1 to 11, consisting of
0.1% or more iron, preferably 0.2% or more iron.
13. The titanium-based alloy composition of any of claims 1 to 12, which satisfies
the flowing equation
800<883—-150Fewt.% —96Crwt.% —49 Mo wt.% —37V wt. %
—17Nbwt.% —12Tawt.% — 7 Zr wt.% — 3 Sn wt. %
+ 15 Al wt. %
in which Fe, Cr, Mo, V, Nb, Ta, Zr, Sn and Al represent the amounts of iron,
chromium, molybdenum, vanadium, niobium, tantalum, zirconium, tin and
aluminium in wt% respectively.
14. The titanium-based alloy composition of any of claims 1 to 13, consisting of
75.0 wt% or more titanium, preferably 80.0 wt% or more titanium.
15. The titanium-based alloy composition of any of claims 1 to 14, consisting of
1.5% or less chromium, more preferably 1.0% or less chromium, more
preferably 0.75% or less chromium.
16. The titanium-based alloy composition of any of claims 1 to 15, consisting of
0.15% or more chromium, preferably 0.25% or more chromium, more
preferably 0.35% or more chromium.
17. The titanium-based alloy composition of any of claims 1 to 16, consisting of
1.5% or less niobium, more preferably 1.25% or less niobium.
18. The titanium-based alloy composition of any of claims 1 to 17, consisting of
0.25% or more niobium, preferably 0.5% or more niobium, more preferably
0.75% or more niobium, even more preferably 1.0% or more niobium.
19. The titanium-based alloy composition of any of claims 1 to 18, consisting of
0.25% or less boron.
20. The titanium-based alloy composition of any of claims 1 to 19, consisting of
0.05% or more boron.
21. The titanium-based alloy composition of any of claims 1 to 20 consisting of
0.5% or less silicon.
22. The titanium-based alloy composition of any of claims 1 to 22, consisting of
0.15% or more silicon, preferably 0.25% or more silicon.
23. The titanium-based alloy composition of any of claims 1 to 21, which satisfies
the flowing equation
50Al + 35V + 75Fe + 65Cr + 20Zr + 50Mo + 15Nb + 258n 2 550, preferably2600
in which Fe, Cr, Mo, V, Nb, Ta, Zr, Sn and Al represent the amounts of iron,
chromium, molybdenum, vanadium, niobium, tantalum, zirconium, tin and
aluminium in wt% respectively.
24. The titanium-based alloy composition of any of claims 1 to 21, which satisfies
the flowing equation
0.076A] + 0.0153V + 1.53Fe + 023Cr + 0.025Zr + 0.05Mo + 0.028Nb +
0.0538Sn>1.0
in which Fe, Cr, Mo, V, Nb, Ta, Zr, Sn and Al represent the amounts of iron,
chromium, molybdenum, vanadium, niobium, tantalum, zirconium, tin and
aluminium in wt% respectively.
25. The titanium-based alloy composition of any of claims 1 to 24, consisting of
0.1 wt% or more hafnium.
26. The titanium-based alloy composition of any of claims 1 to 25, wherein the
sum of wt % of each of cobalt, nickel and manganese is 1.0 wt. % or less,
preferably 0.5 wt% or less.
27. The titanium-based alloy composition of any of claims 1 to 26, consisting of
5.0 wt.% or more aluminium, preferably 6.0 wt.% or more aluminium.
28. The titanium-based alloy composition of any of claims 1 to 27 consisting of
7.5Wt.% or less aluminium preferably 7.0% or less aluminium.
29. The titanium-based alloy composition of any of claims 1 to 28, wherein the
sum in weight percent of chromium, cobalt, iron, nickel and manganese is
1.75 wt.% or less, preferably of 1.5 wt.% or less, more preferably 1.0 wt.% or
less, more preferably 0.75 wt.% or less.
30. The titanium-based alloy composition of any of claims 1 to 29, wherein the
alloy has a microstructure of at least 90% alpha phase.
31. The titanium-based alloy composition of any of claims 1 to 30, which satisfies
the flowing equation
0.107Al + 0.075V + 0 4Fe + 0.112Cr + 0.025Zr + 0.05Mo + 0.082Nb +
0.027Sn>1.05
where Al, V, Fe, Cr, Zr, Mo, Nb and Sn represent the amounts of aluminium,
vanadium, iron, chromium, zirconium, molybdenum, niobium and tin in wt.%
respectively.
32. The titanium-based alloy composition of any of claims 1 to 31, which satisfies
the flowing equation
44370 27Al 785Fe 549V 10.18Mo 6.49Zr 7.85Cr 8.6Nb 7.315n 1665Ta 13.07Hf B89INi 7.3Mn 886Co 2378 2.5750 Los 7766 + 2608 * 5564 1 5004 1 9394 + 9122 ' 5199 10250 ' 11671 ' 18004 ' 17849 3869 ' 5493 ' 5893 ' 1081 ' 2808 ) Ti Al V Fe Mo Zr Cr Nb Sn Ta Hj Ni. Mn Co B Si prt ba EE MO 2 Cr NE Sh Te HL NE Mo BS
preferably
44371 2.7Al 785Fe 5.49V 10.18Mo 6.49Zr 7.85Cr A 8.6Nb 7.315n 16.65Ta , 13.07Hf A BINi 7.3Mn 886Co 2.378 2.575 103 (475 +7698 * 5364 T3094 * T9394 +0122 T5199 +9200 T 11671 * 18094 © 17849 T3869 * 3493 * 5893 1081 * 2808 ) TC Ml, V Fe Mo, Zr , Cr Nb Sn _ Ta _ Hf . NL, Mn, CoB 5 Tec t3cos zoos tas T9593 T9133 T3195 T9300 T1171 T 18093 T T9635 T 2865 T 2393 T3593 T 1051 T 7508
< 4.62
wherein Ti, Al, V, Fe, Cr, Zr, Mo, Nb, Sn, Ta, Hf, Ni, Mn, Co, B and Si
represent the amounts of titanium, aluminium, vanadium, iron, chromium,
zirconium, molybdenum, niobium, tin, tantalum, hafnium, nickel, manganese,
cobalt, boron and silicon in wt.% respectively.
33. An additive manufacturing component made of the titanium-based alloy of any
of claims 1-32.
34. A method of additive manufacturing an article uses the titanium-based alloy of
any of claims 1-32.