US 7,531,054 B2
Nickel alloy and method including direct aging
Richard L. Kennedy, Monroe, N.C. (US); and Wei-Di Cao, Charlotte, N.C. (US)
Assigned to ATI Properties, Inc., Albany, Oreg. (US)
Filed on Sep. 06, 2005, as Appl. No. 11/221,028.
Claims priority of provisional application 60/710806, filed on Aug. 24, 2005.
Prior Publication US 2007/0044875 A1, Mar. 01, 2007
Int. Cl. C22F 1/10 (2006.01); C22C 19/05 (2006.01)
U.S. Cl. 148—677  [148/410; 148/428; 420/447; 420/449; 420/450; 420/588] 35 Claims
OG exemplary drawing
 
1. A method of processing a nickel-base alloy comprising, in percent by weight, up to about 0.1% carbon, from about 12% to about 20% chromium, up to about 4% molybdenum, up to about 6% tungsten, from about 5% to about 12% cobalt, up to about 14% iron, from about 4% to about 8% niobium, from about 0.6% to about 2.6% aluminum, from about 0.4% to about 1.4% titanium, from about 0.003% to about 0.03% phosphorus, from about 0.003% to about 0.015% boron, and nickel; wherein a sum of the weight percent of molybdenum and the weight percent of tungsten is at least about 2% and not more than about 8%, and wherein a sum of atomic percent aluminum and atomic percent titanium is from about 2% to about 6%, a ratio of atomic percent aluminum to atomic percent titanium is at least about 1.5, and the sum of atomic percent aluminum and atomic percent titanium divided by atomic percent niobium is from about 0.8 to about 1.3, the method comprising:
working said nickel-base alloy into a desired shape; and
direct aging said nickel-base alloy.