A NICKEL-BASED ALLOY
A nickel-based alloy composition consisting, in weight percent, of: between 3.5 and 6.5% chromium, between 0.0 and 12.0% cobalt, between 4.5 and 11.5% tungsten, between 0.0 and 0.5% molybdenum, between 3.5 and 7.0% rhenium, between 1.0 and 3.7% ruthenium, between 3.7 and 6.8% aluminium, between 5.0 and 9.0% tantalum, between 0.0 and 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 3.5 and 6.5% chromium, between 0.0 and 12.0% cobalt, between 4.5 and 11.5% tungsten, between 0.0 and 0.5% molybdenum, between 3.5 and 7.0% rhenium, between 1.0 and 3.7% ruthenium, between 3.7 and 6.8% aluminium, between 5.0 and 9.0% tantalum, between 0.0 and 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 4.0 and 5.0% chromium.
3 . The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 0.1 to 12.0 wt % cobalt, more preferably 0.1 to 11.0% cobalt, or 0.1 to 10.9% cobalt, most preferably 7.0 and 11.0% cobalt or even between 7.0 and 10.9% cobalt.
4 . The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 7.0 and 9.5% tungsten, or of between 7.1 and 11.5 wt % tungsten, preferably between 7.1 and 9.5% tungsten.
5 . The nickel-based alloy composition according to claim 1 , consisting, in weight percent of, between 3.7 and 6.6%, preferably between 5.1 and 6.6% aluminium, more preferably between 5.5 and 6.6% aluminium.
6 . The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 5.0 and 7.3% tantalum.
7 . The nickel-based alloy according to claim 1 , consisting, in weight percent, of at least 0.1% molybdenum.
8 . The nickel-based alloy according to claim 1 , consisting, in weight percent, of between 4.5 and 6.0% rhenium, more preferably between 5.3 and 6.0% rhenium.
9 . The nickel-based alloy according to claim 1 , consisting, in weight percent, of between 2.0 and 3.0% ruthenium, preferably between 2.1 and 2.9% ruthenium.
10 . 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 +5.1 W Al ≤39.
11 . 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
2.2≤5.15 W Al −0.5 W Al 2 −W Ta ,
preferably 2.9≤5.15 W Al −0.5 W Al 2 −W Ta .
12 . The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Ru and W Re are the weight percent of ruthenium and rhenium in the alloy respectively
4.5≥ W Ru +0.225 W Re ,
preferably 3.9≥ W Ru +0.225 W Re .
13 . The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Re and W W are the weight percent of rhenium and tungsten in the alloy respectively
15.8≥1.13 W Re +W W ,
preferably 14.4≥1.13 W Re +W W .
14 . The nickel-based alloy composition according to claim 1 , wherein the following equation is satisfied in which W Re , W Mo and W W are the weight percent of rhenium, molybdenum and tungsten in the alloy respectively
21.9≤2.92 W Re +( W W +W Mo ),
preferably 24.6≤2.92 W Re +( W W +W Mo ).
15 . The nickel-based alloy composition according to claim 1 , wherein the sum of the elements niobium, titanium and vanadium, in weight percent, is less than 1%, preferably less than 0.5 wt %.
16 . The nickel-based alloy composition according to claim 1 , consisting, in weight percent, of between 0.0 and 0.2% hafnium.
17 . The nickel-based alloy composition according to claim 1 , having between 60% and 70% volume fraction γ′.
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 5.0 and 9.0%, preferably between 5.0-7.3%.
19 . A single crystal article formed of the nickel-based alloy composition of claim 1 .
20 . A turbine blade for a gas turbine engine formed of an alloy according to claim 1 .
21 - 25 . (canceled)