Patent ID: 8992700
Filing Date: 2015-03-31
Classification: B22F,C22C

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: 18.0 to 30.0% cobalt; 11.4 to 16.0% chromium; up to 6.0% tantalum, 2.5 to 3.5% aluminum; 2.5 to 3.4% titanium; 5.5 to 7.5% molybdenum; up to 2.0% niobium; up to 2.0% hafnium; 0.04 to 0.20% carbon; 0.01 to 0.05% boron; 0.03 to 0.09% zirconium; the balance essentially nickel and impurities, wherein the titanium:aluminum weight ratio is 0.71 to 1.36, wherein the superalloy contains sufficiently low levels of topologically close-packed (TCP) phases including the sigma phase and the eta phase (Ni