Patent ID: 8608877

Claim:
A method for forming an article, the method comprising: providing a workpiece comprising an alloy matrix phase, the alloy matrix phase comprising the following elements, in weight percent: at least about 40% nickel, from about 1.5% to about 8% titanium, and from about 1.5% to about 4.5% aluminum, wherein a weight ratio of titanium to aluminum is in the range from about 1 to about 4, and wherein the workpiece further comprises A3-structured ordered grain boundary pinning eta phase precipitates distributed within the matrix phase at a concentration of about 3% to about 25% by volume; mechanically working the workpiece at a temperature below a solvus temperature of the eta phase; and heat treating the workpiece at a temperature sufficiently high to dissolve any gamma prime phase present in the workpiece but below the solvus temperature of the eta phase.