Laura A Carroll

US Patent:

20100254822, Oct 7, 2010

Filed:

Sep 30, 2009

Appl. No.:

12/570555

Inventors:

Brian Thomas Hazel - West Chester OH, US
Kevin Swayne O'Hara - Boxford MA, US
Laura Jill Carroll - Ammon ID, US

International Classification:

F03B 3/12
C22C 19/05

US Classification:

416241 R, 420445, 420448, 420443

Abstract:

A nickel-base superalloy composition including (measured in % by weight) from about 6.5 to about 7.5% aluminum, from about 4 to about 8% tantalum, from about 3 to about 10% chromium, from about 2 to about 7% tungsten, from 0 to about 4% molybdenum, from 0 to about 6% rhenium, from 0 to less than about 0.001% niobium, from 0 to about 5% cobalt, from 0 to about 0.2% silicon, from 0 to about 0.06% carbon, optionally, from 0 to about 0.5% titanium, from 0 to about 0.005% boron, from about 0.15 to about 0.7% hafnium, from 0 to about 0.03% of a rare earth addition selected from the group consisting of yttrium, lanthanum, cesium, and combinations thereof, balance nickel and incidental impurities. The nickel-base superalloy composition may be used in single-crystal or directionally solidified superalloy articles such as high pressure turbine blades for a gas turbine engine.