Super oxidation and cyclic damage resistant nickel-base superalloy and articles formed therefrom

摘要: A nickel-base superalloy composition including (measured in % by weight) from about 6.8 to 7.5% aluminum, 4 8% tantalum, 10% chromium, 2 7% tungsten, 0 6% rhenium, 5% cobalt, 0.2% silicon, optionally, 0.15 0.7% hafnium, 0.5% titanium, 4% molybdenum, 0.005% boron, 0.06% carbon, 0.03% of a rare earth addition selected the group consisting yttrium, lanthanum, cesium, and combinations thereof, balance nickel incidental impurities. The may be used single-crystal or directionally solidified articles such as high pressure turbine blades for gas engine.