Nickel-based alloy
A nickel-based alloy composition consisting, in weight percent, of: between 12.3 and 15.2% chromium, between 4.8 and 12.0% cobalt, between 2.5 and 8.3% tungsten, between 0.0 and 0.5% molybdenum, between 0.0 and 0.5% rhenium, between 3.5 and 6.7% aluminium, between 6.1 and 10.7% tantalum, between 0.0 and up to 0.5% hafnium, between 0.0 and 0.5% niobium, between 0.0 and 0.5% titanium, between 0.0 and 0.5% vanadium, between 0.0 and 0.1% silicon, between 0.0 and 0.1% yttrium, between 0.0 and 0.1% lanthanum, between 0.0 and 0.1% cerium, between 0.0 and 0.003% sulphur, between 0.0 and 0.05% manganese, between 0.0 and 0.05% zirconium, between 0.0 and 0.005% boron, between 0.0 and 0.01% carbon, the balance being nickel and incidental impurities.
1. A nickel-based alloy composition consisting, in weight percent, of: between 12.3 and 15.2% chromium, between 4.8 and 12.0% cobalt, between 2.5 and 8.3% tungsten, between 0.0 and 0.5% molybdenum, between 0.0 and 0.5% rhenium, between 3.5 and 6.7% aluminium, between 6.1 and 10.7% tantalum, between 0.0 and up to 0.5% hafnium, between 0.0 and 0.5% niobium, between 0.0 and 0.5% titanium, between 0.0 and 0.5% vanadium, between 0.0 and 0.1% silicon, between 0.0 and 0.1% yttrium, between 0.0 and 0.1% lanthanum, between 0.0 and 0.1% cerium, between 0.0 and 0.003% sulphur, between 0.0 and 0.05% manganese, between 0.0 and 0.05% zirconium, between 0.0 and 0.005% boron, between 0.0 and 0.01% carbon, the balance being nickel and incidental impurities.
2. The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 12.3 and 14.7% chromium.
3. The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 7.1 and 11.0% cobalt.
4. The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 3.3 and 6.4% tungsten.
5. The nickel-based alloy composition according to claim 1 , consisting, in weight percent of, between 4.5 and 6.4% aluminium.
6. The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 6.5 and 10.7% tantalum.
7. The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 0.0 and 0.2% hafnium.
8. The nickel-based alloy composition according to claim 1 , wherein the sum of the elements cobalt and tungsten, in weight percent, is greater than 13.5%.
9. The nickel-based alloy composition according to claim 1 , wherein the sum of the elements cobalt, tungsten, rhenium and molybdenum, in weight percent, is greater than 13.5%.
10. The nickel-based alloy composition according to claim 1 , wherein the sum of the elements tungsten and tantalum, in weight percent, is less than 14.4%.
11. The nickel-based alloy composition according to claim 1 , wherein the sum of the elements aluminium and tantalum, in weight percent, is between 11.5 and 16.2%.
12. The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Ta and W Al are the weight percent of tantalum and aluminium in the alloy respectively
33 ≤W Ta +5.2 W Al ≤45.
13. The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Ta , W Al , W Ti , W Nb and W v are the weight percent of tantalum, aluminium, titanium, niobium and vanadium in the alloy respectively
4.2≤( W Ta +W Ti +W Nb +W v )−0.5 W Al .
14. The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W W , W Mo , W Re and W Co are the weight percent of tungsten, molybdenum, rehenium and cobalt in the alloy respectively
15.2≤[1.26( W W +W Mo +W Re )]+ W Co .
15. The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Ta and W W are the weight percent of tantalum and tungsten in the alloy respectively
12.7 ≥W Ta +0.87 W W .
16. The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Cr and W W are the weight percent of chromium and tungsten in the alloy respectively
11.64 ≥W Cr +0.179 W W 2 −1.54 W W .
17. The nickel-based alloy composition according to claim 1 , wherein the sum of the elements rhenium, molybdenum and tungsten, in weight percent, is at least 2.5%.
18. The nickel-based alloy according to claim 1 , wherein the sum of the elements niobium, titanium, vanadium and tantalum, in weight percent, is between 6.1 and 10.7%.
19. The nickel-based alloy according to claim 1 , consisting, in weight percent, of at least 0.1% molybdenum.
20. A single crystal article formed of the nickel-based alloy composition of claim 1 .