Single crystal nickel-based superalloy compositions, components, and manufacturing methods therefor

Abstract

Single crystal nickel-based superalloy compositions, single crystal nickel-based superalloy components, and methods of fabricating such components are provided. In an embodiment, by way of example only, a single crystal nickel-based superalloy composition consists essentially of, in weight percent from about 3.8 to about 4.2 percent chromium, from about 10.0 to about 10.5 percent cobalt, from about 1.8 to about 2.2 percent molybdenum, from about 4.8 to about 5.2 percent tungsten, from about 5.8 to about 6.2 percent rhenium, from about 5.5 to about 5.8 percent aluminum, from about 5.8 to about 6.2 percent tantalum, from about 3.8 to about 4.2 percent ruthenium, from about 0.13 to about 0.17 percent hafnium, and a balance of nickel.

1 . A single crystal nickel-based superalloy composition consisting essentially of, in weight percent:
 from about 3.8 to about 4.2 percent chromium;   from about 10.0 to about 10.5 percent cobalt;   from about 1.8 to about 2.2 percent molybdenum;   from about 4.8 to about 5.2 percent tungsten;   from about 5.8 to about 6.2 percent rhenium;   from about 5.5 to about 5.8 percent aluminum;   from about 5.8 to about 6.2 percent tantalum;   from about 3.8 to about 4.2 percent ruthenium;   from about 0.13 to about 0.17 percent hafnium; and   a balance of nickel.   
   
   
       2 . The single crystal nickel-based superalloy composition of  claim 1 , further consisting essentially of from about 0.001 to about 0.015 weight percent of a material selected from a group consisting of yttrium, lanthanum, and a combination thereof. 
   
   
       3 . The single crystal nickel-based superalloy composition of  claim 2 , further consisting essentially of from about 0.02 to about 0.06 weight percent carbon and from about 0.003 to about 0.006 weight percent boron. 
   
   
       4 . The single crystal nickel-based superalloy composition of  claim 1 , wherein a sum of the molybdenum, tungsten, ruthenium, tantalum, and rhenium is from about 20.0 to about 25.0 weight percent. 
   
   
       5 . A single crystal nickel-based superalloy component fabricated of a single crystal composition consisting essentially of, in weight percent:
 from about 3.8 to about 4.2 percent chromium;   from about 10.0 to about 10.5 percent cobalt;   from about 1.8 to about 2.2 percent molybdenum;   from about 4.8 to about 5.2 percent tungsten;   from about 5.8 to about 6.2 percent rhenium;   from about 5.5 to about 5.8 percent aluminum;   from about 5.8 to about 6.2 percent tantalum;   from about 3.8 to about 4.2 percent ruthenium;   from about 0.13 to about 0.17 percent hafnium; and   a balance of nickel.   
   
   
       6 . The single crystal nickel-based superalloy component of  claim 5 , wherein the single crystal nickel-based superalloy component is a turbine blade. 
   
   
       7 . The single crystal nickel-based superalloy component of  claim 5 , wherein the single crystal nickel-based superalloy component is a vane. 
   
   
       8 . The single crystal nickel-based superalloy component of  claim 5 , further consisting essentially of from about 0.001 to about 0.015 weight percent of one selected from a group consisting of yttrium, lanthanum, and a combination thereof. 
   
   
       9 . The single crystal nickel-based superalloy component of  claim 8 , further consisting essentially of from about 0.02 to about 0.06 weight percent carbon and from about 0.003 to about 0.006 weight percent boron. 
   
   
       10 . The single crystal nickel-based superalloy component of  claim 5 , wherein a sum of the molybdenum, tungsten, ruthenium, tantalum, and rhenium is from about 20.0 to about 25.0 weight percent. 
   
   
       11 . A method for fabricating a single crystal nickel-based superalloy component, the method comprising the steps of:
 providing an alloy comprising, in weight percent:
 from about 3.8 to about 4.2 percent chromium; 
 from about 10.0 to about 10.5 percent cobalt; 
 from about 1.8 to about 2.2 percent molybdenum; 
 from about 4.8 to about 5.2 percent tungsten; 
 from about 5.8 to about 6.2 percent rhenium; 
 from about 5.5 to about 5.8 percent aluminum; 
 from about 5.8 to about 6.2 percent tantalum; 
 from about 3.8 to about 4.2 percent ruthenium; 
 from about 0.13 to about 0.17 percent hafnium; and 
 a balance of nickel; and 
   fabricating a single crystal component from the alloy.   
   
   
       12 . The method of  claim 11 , wherein the step of providing an alloy comprises the step of providing an alloy further comprising from about 0.001 to about 0.015 weight percent of a material selected from a group consisting of yttrium, lanthanum, and a combination thereof. 
   
   
       13 . The method of  claim 12 , wherein the step of providing an alloy comprises the step of providing an alloy further comprising from about 0.02 to about 0.06 weight percent carbon and from about 0.003 to about 0.006 weight percent boron. 
   
   
       14 . The method of  claim 11 , wherein the step of fabricating a single crystal component from the alloy comprises the step of fabricating a turbine blade and a vane from the alloy.