A nickel-based alloy

Abstract

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)