Compositions, Articles and Methods for Forming the Same

Abstract

Compositions, and articles and methods for forming articles which include said compositions, are disclosed. The compositions include, by weight percent, 13.7% to 14.3% chromium (Cr), 9.0% to 9.9% cobalt (Co), 4.0% to 5.5% aluminum (Al), 0.5% to 3.0% titanium (Ti), 3.5% to 5.0% tungsten (W), 1.4% to 4.0% molybdenum (Mo), 1.8% to 4.2% niobium (Nb), 0.08% to 0.12% carbon (C), 0.005% to 0.04% zirconium (Zr), 0.010% to 0.014% boron (B), and balance nickel (Ni) and incidental impurities.

We claim: 
     
         1 . A composition comprising, by weight percent:
 13.7% to 14.3% chromium (Cr);   9.0% to 9.9% cobalt (Co);   4.0% to 5.5% aluminum (Al);   0.5% to 3.0% titanium (Ti);   3.5% to 5.0% tungsten (W);   1.4% to 4.0% molybdenum (Mo);   1.8% to 4.2% niobium (Nb);   0.08% to 0.12% carbon (C);   0.005% to 0.04% zirconium (Zr);   0.010% to 0.014% boron (B); and   balance nickel (Ni) and incidental impurities.   
     
     
         2 . The composition of  claim 1 , wherein the composition has a microstructure substantially devoid of Eta phase. 
     
     
         3 . The composition of  claim 1 , wherein a volume fraction of gamma prime is greater than 60%. 
     
     
         4 . The composition of  claim 1 , wherein the composition comprises, by weight percent, 4.25% to 5.3% aluminum (Al). 
     
     
         5 . The composition of  claim 1 , wherein the composition comprises, by weight percent, 1.0% to 2.0% titanium (Ti). 
     
     
         6 . The composition of  claim 1 , wherein the composition comprises, by weight percent 3.75% to 4.9% tungsten (W). 
     
     
         7 . The composition of  claim 1 , wherein the composition comprises, by weight percent, 2.0% to 4.0% niobium (Nb). 
     
     
         8 . The composition of  claim 1 , wherein the composition comprises, by weight percent:
 13.9% to 14.1% chromium (Cr);   9.25% to 9.75% cobalt (Co);   4.25% to 5.30% aluminum (Al);   1.0% to 2.0% titanium (Ti);   3.75% to 4.9% tungsten (W);   1.5% to 3.0% molybdenum (Mo);   2.0% to 4.0% niobium (Nb);   0.09% to 0.11% carbon (C);   0.01% to 0.03% zirconium (Zr); and   0.011% to 0.013% boron (B).   
     
     
         9 . The composition of  claim 1 , wherein a weight percent of aluminum (Al) with respect to a weight percent of titanium (Ti) is Al=−0.5*Ti+5.5±0.05. 
     
     
         10 . A gas turbine component comprising, by weight percent:
 13.7% to 14.3% chromium (Cr);   9.0% to 9.9% cobalt (Co);   4.0% to 5.5% aluminum (Al);   0.5% to 3.0% titanium (Ti);   3.5% to 5.0% tungsten (W);   1.4% to 4.0% molybdenum (Mo);   1.8% to 4.2% niobium (Nb);   0.08% to 0.12% carbon (C);   0.005% to 0.04% zirconium (Zr);   0.010% to 0.014% boron (B); and   balance nickel (Ni) and incidental impurities,   wherein, the gas turbine component comprises a hot gas path turbine component.   
     
     
         11 . The gas turbine component of  claim 10 , wherein the gas turbine component has a microstructure substantially devoid of Eta phase. 
     
     
         12 . The gas turbine component of  claim 10 , wherein a weight percent of aluminum (Al) with respect to a weight percent of titanium (Ti) is Al=−0.5*Ti+5.5±0.05. 
     
     
         13 . A method for forming an article, the method comprising:
 manufacturing a composition comprising, by weight percent:
 13.7% to 14.3% chromium (Cr); 
 9.0% to 9.9% cobalt (Co); 
 4.0% to 5.5% aluminum (Al); 
 0.5% to 3.0% titanium (Ti); 
 3.5% to 5.0% tungsten (W); 
 1.4% to 4.0% molybdenum (Mo); 
 1.8% to 4.2% niobium (Nb); 
 0.08% to 0.12% carbon (C); 
 0.005% to 0.04% zirconium (Zr); 
 0.010% to 0.014% boron (B); and 
 balance nickel (Ni) and incidental impurities; and 
   heat treating the composition.   
     
     
         14 . The method of  claim 13 , wherein the composition has a microstructure substantially devoid of Eta phase. 
     
     
         15 . The method of  claim 13 , wherein a volume fraction of gamma prime is greater than 60%. 
     
     
         16 . The method of  claim 13 , wherein the composition comprises, by weight percent, 4.25% to 5.3% aluminum (Al). 
     
     
         17 . The method of  claim 13 , wherein the composition comprises, by weight percent, 1.0% to 2.0% titanium (Ti). 
     
     
         18 . The method of  claim 13 , wherein the composition comprises, by weight percent:
 13.9% to 14.1% chromium (Cr);   9.25% to 9.75% cobalt (Co);   4.25% to 5.30% aluminum (Al);   1.0% to 2.0% titanium (Ti);   3.75% to 4.9% tungsten (W);   1.5% to 3.0% molybdenum (Mo);   2.0% to 4.0% niobium (Nb);   0.09% to 0.11% carbon (C);   0.01% to 0.03% zirconium (Zr); and   0.011% to 0.013% boron (B).   
     
     
         19 . The method of  claim 13 , wherein a weight percent of aluminum (Al) with respect to a weight percent of titanium (Ti) is Al=−0.5*Ti+5.5±0.05. 
     
     
         20 . The method of  claim 13 , wherein manufacturing the composition comprises casting.