Nickel-based alloy and turbine component having nickel-based alloy

Abstract

A nickel-based alloy and a turbine component including a nickel-based alloy are disclosed. The nickel-based alloy includes, by weight, between about 8% and about 11% cobalt, up to about 3% niobium, up to about 3% titanium, up to about 2.3% aluminum, up to about 3% tungsten, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel, or the nickel-based alloy includes, by weight, between about 1% and about 3% niobium, between about 1% and about 3% titanium, between about 2.1% and about 2.5% aluminum, up to about 3% tungsten, up to about 11% cobalt, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel. The turbine component includes the nickel-based alloy.

What is claimed is: 
     
         1 . A nickel-based alloy, comprising, by weight:
 between about 8% and about 11% cobalt, up to about 3% niobium, up to about 3% titanium, up to about 2.3% aluminum, up to about 3% tungsten, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and balance nickel.   
     
     
         2 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy is a portion of a turbine component. 
     
     
         3 . The nickel-based alloy of  claim 2 , wherein the turbine component is a turbine nozzle casing. 
     
     
         4 . The nickel-based alloy of  claim 1 , wherein the cobalt is at a concentration, by weight, of about 9.5%. 
     
     
         5 . The nickel-based alloy of  claim 1 , wherein the chromium is at a concentration, by weight, of about 22.5%. 
     
     
         6 . The nickel-based alloy of  claim 1 , wherein the tungsten is at a concentration, by weight, of about 2%. 
     
     
         7 . The nickel-based alloy of  claim 1 , wherein the niobium is at a concentration, by weight, of about 2%. 
     
     
         8 . The nickel-based alloy of  claim 1 , wherein the titanium is at a concentration, by weight, of about 2.3%. 
     
     
         9 . The nickel-based alloy of  claim 1 , wherein the aluminum is at a concentration, by weight, of about 2.3%. 
     
     
         10 . The nickel-based alloy of  claim 1 , wherein the carbon is at a concentration, by weight, of about 0.08%. 
     
     
         11 . The nickel-based alloy of  claim 1 , wherein the boron is at a concentration, by weight, of about 0.008%. 
     
     
         12 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes tensile strength at 1200° F. for 0.2%, yield strength of about 90 ksi. 
     
     
         13 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes tensile ductility at 1200° F. of about 27%. 
     
     
         14 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes low-cycle fatigue properties at 1600° F. with 0.7% strain for 2 minutes of about 3,600 cycles prior to crack initiation. 
     
     
         15 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes creep properties of 2% creep under 18 ksi at 1600° F. at about 1,980 hours. 
     
     
         16 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy exhibits oxidation, after about 2,000 hours, of about 127 microns. 
     
     
         17 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes corrosion-resistance, under conditions of 1,700° F. in 5 ppm salt with 0.4% sulfur, of about 47 microns after 600 hours, of about 116 microns after 1,000 hours, and 189 microns after 1,400 hours. 
     
     
         18 . The nickel-based alloy of  claim 1 , wherein the nickel-based alloy includes substantially equivalent or increased weldability, castability, structural stability, high temperature strength, hot corrosion resistance, creep strength, yield strength, ductility, and phase stability in comparison to each of the following:
 a first comparative alloy having a composition, by weight, of between about 15% and about 20% cobalt, between about 10% and 19% chromium, between about 2.5% and 3.4% aluminum, less than about 0.5% tantalum, less than about 1.0% molybdenum, less than about 0.06% zirconium, less than about 0.04% boron, between about 1.1% and about 1.5% niobium, between about 3.0% and 3.9% titanium, up to about 3% tungsten, between about 0.03% and 0.07% carbon, and a balance of nickel;   a second comparative alloy having a composition, by weight, of about between about 0.08% and 0.12% carbon, between about 22.2% and 22.8% chromium, about 0.10% manganese, about 0.25% silicon, between about 18.5% and 19.5% cobalt, between about 1.8% and 2.2% tungsten, about 2.3% titanium, about 1.2% aluminum, about 1.0% tantalum, about 0.8% niobium, about 0.05% zirconium, about 0.008% boron, and a balance of nickel;   a third comparative alloy having a composition, by weight, of about 22.5% chromium, about 19% cobalt, about 2% tungsten, about 1.35% niobium, about 2.3% titanium, about 1.2% aluminum, about 0.1% carbon, about 0.01% zirconium, about 0.01% boron, and a balance of nickel; and   a fourth comparative alloy having a composition, by weight, of about 22.5% chromium, about 19% cobalt, about 2% tungsten, about 1.35% niobium, about 2.3% titanium, about 1.7% aluminum, about 0.1% carbon, about 0.01% zirconium, about 0.01% boron and a balance of nickel.   
     
     
         19 . A nickel-based alloy, comprising, by weight:
 between about 1% and about 3% niobium, between about 1% and about 3% titanium, between about 2.1% and about 2.5% aluminum, up to about 3% tungsten, up to about 11% cobalt, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel.   
     
     
         20 . A turbine component, comprising one or both of:
 a first nickel-based alloy comprising between about 8% and about 11% cobalt, up to about 3% niobium, up to about 3% titanium, up to about 2.3% aluminum, up to about 3% tungsten, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel; and   a second nickel-based alloy comprising between about 1% and about 3% niobium, between about 1% and about 3% titanium, between about 2.1% and about 2.5% aluminum, up to about 3% tungsten, up to about 11% cobalt, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel.