Monocrystalline alloys with controlled partitioning

Abstract

Nickel-based superalloys, for fabrication of monocrystalline turbine components to be used in industrial and aircraft turbine engines, having the following composition (in wt %): 5.6-8.1% Al, 4.1-14.1% Ru, 6.1-9.9% Ta, 3.6-7.5% Re, and the remaining balance Ni. The partitioning of alloying elements can be controlled to achieve a wide range of precipitate shapes and exceptional resistance to degradation under high temperature exposure conditions.

1 . A superalloy comprising: 
 about 5.6 to about 8.1 percent by weight of aluminum (Al);    about 4.1 to about 14.1 percent by weight of ruthenium (Ru);    about 6.1 to about 9.9 percent by weight of tantalum (Ta);    about 3.6 to about 7.5 percent by weight of rhenium (Re); and    nickel (Ni).    
   
   
       2 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 12.4 percent by weight of tungsten (W).    
   
   
       3 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 9.6 percent by weight of cobalt (Co).    
   
   
       4 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 6.9 percent by weight of chromium (Cr).    
   
   
       5 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 0.7 percent by weight of silicon (Si).    
   
   
       6 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 1.5 percent by weight of molybdenum (Mo).    
   
   
       7 . The superalloy according to  claim 1 , further comprising: 
 about 0.1 to about 0.8 percent by weight of titanium (Ti).    
   
   
       8 . The superalloy according to  claim 1 , further comprising spherical precipitates.  
   
   
       9 . The superalloy according to  claim 1  wherein said superalloy forms a monocrystalline structure.  
   
   
       10 . A turbine article comprising: 
 a monocrystalline alloy having about 5.6 to about 8.1 percent by weight of aluminum (Al), about 4.1 to about 14.1 percent by weight of ruthenium (Ru), about 6.1 to about 9.9 percent by weight of tantalum (Ta), about 3.6 to about 7.5 percent by weight of rhenium (Re), and nickel (Ni).    
   
   
       11 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 12.4 percent by weight of tungsten (W).  
   
   
       12 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 9.6 percent by weight of cobalt (Co).  
   
   
       13 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 6.9 percent by weight of chromium (Cr).  
   
   
       14 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 0.7 percent by weight of silicon (Si).  
   
   
       15 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 1.5 percent by weight of molybdenum (Mo).  
   
   
       16 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises about 0.1 to about 0.8 percent by weight of titanium (Ti).  
   
   
       17 . The turbine article according to  claim 10  wherein said monocrystalline alloy further comprises spherical precipitates.  
   
   
       18 . A superalloy comprising: 
 about 5.6 to about 6.3 percent by weight of aluminum (Al);    about 4.1 to about 9.7 percent by weight of ruthenium (Ru);    about 6.1 to about 9.9 percent by weight of tantalum (Ta);    about 3.6 to about 7.5 percent by weight of rhenium (Re); and    nickel (Ni).    
   
   
       19 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 12.4 percent by weight of tungsten (W).    
   
   
       20 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 9.6 percent by weight of cobalt (Co).    
   
   
       21 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 6.9 percent by weight of chromium (Cr).    
   
   
       22 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 0.7 percent by weight of silicon (Si).    
   
   
       23 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 1.5 percent by weight of molybdenum (Mo).    
   
   
       24 . The superalloy according to  claim 18 , further comprising: 
 about 0.1 to about 0.8 percent by weight of titanium (Ti).    
   
   
       25 . The superalloy according to  claim 18 , further comprising spherical precipitates.  
   
   
       26 . The superalloy according to  claim 18  wherein said superalloy forms a monocrystalline structure.