Superalloy article and nickel-base superalloy compositions rhenium-free substantially

摘要

Substantially nickel-base superalloy composition that does not include the rhenium, in weight percent, Cr about 5-8, Co about 7-8, Mo about 1.3-2.2, W about 4.75-6.75 , Ta about 6.0-7.0, Ti about 0.5 or less, if present, Al about 6.0-6.4, Hf about 0.15-0.6, if present C about 0. 03-0.06, if present B about 0.004 or less, if present Y, one selected from La and Ce or more of the rare earth element total of about 0.03 or less, the nickel and incidental impurities including the remainder, including. Superalloy composition can provide at least comparable to the second generation superalloy composition containing about 3 weight percent rhenium, sustained peak low cycle fatigue resistance and / or oxidation resistance. The superalloy article comprising the composition, a nozzle of a gas turbine engine, the shroud and the splash plate and the like. .FIELD 1