Patent ID: 8992699
Filing Date: 2015-03-31
Classification: B22F,C22C,C22F,F01D

Abstract:
1. A gamma-prime nickel-base superalloy that has been hot-worked at a temperature at or near a recrystallization temperature of the superalloy but less than a gamma prime solvus temperature of the superalloy, the superalloy consisting of, by weight: 16.0 to 30.0% cobalt; 11.5 to 15.0% chromium; 4.0 to 6.0% tantalum; 2.0 to 4.0% aluminum; 2.0 to 3.4% titanium; up to 5.0% tungsten; 1.0 to 7.0% molybdenum; up to 3.5% niobium; up to 1.0% hafnium; 0.02 to 0.20% carbon; 0.01 to 0.05% boron; 0.02 to 0.10% zirconium; the balance essentially nickel and impurities, wherein the titanium:aluminum weight ratio is 0.5 to 1.7, wherein the superalloy contains sufficiently low levels of topologically close-packed (TCP) phases including the sigma phase and the eta phase (Ni