Nickel base superalloy and article

摘要: The present invention provides a nickel base superalloy having an improved combination of stress rupture life and microstructural stability with respect to the formation TCP phases. A unique feature is specific content elements consisting Al, Ti W in second range defined by their sum high contents rhenium, excess 1.3 atomic percent (about 4.0 weight percent) lower propensity for phase thus render alloy more stable at temperatures. interaction Ru remaining modify refractory element partitioning capabilities, causing partition gamma or prime reverse direction than normally experienced Ni-base superalloys. These superalloys are termed Ru-containing Reverse Partitioning Superalloys. composition these range, percent, 1.3-3% Re, 2.0-3.7% Ta, 4.0-18.0% Co, 0-0.2% Hf, 0-0.3% C, 0-0.05% B, 0-0.03% Y, 0-2.0% Mo, 1.5-7.2% Cr, Cb, 12.0-15.0% 0-1.3% Ti, 1.0-2.5% W, 0.25-4.0 balance Ni incidental impurities.