Patent ID: 8613810

Claim:
A gamma-prime nickel-base alloy having a polycrystalline microstructure, the alloy consisting of, by weight: 10.00 to 22.0% cobalt; 10.0 to 14.0% chromium; 4.0 to 6.0% tantalum; 2.0 to 4.0% aluminum; 2.0 to 6.0% titanium; 1.5 to 5.0% tungsten; 1.5 to 5.0% molybdenum; 1.0 to 3.5% niobium; 0.05 to 0.6% hafnium; 0.02 to 0.10% carbon; 0.01 to 0.40% boron; 0.02 to 0.10% zirconium; the balance nickel and impurities, wherein the titanium:aluminum weight ratio is 0.7 to 1.5, wherein the polycrystalline microstructure of the alloy contains cellular precipitates of gamma prime and finer precipitates of gamma prime, the cellular precipitates comprising gamma prime arms radiating outward from an origin with the result that the cellular precipitates have convoluted borders, the finer gamma prime precipitates being dispersed between the arms of the cellular precipitates.