	US 12,264,383 B2
	NiCrMoNb age hardenable alloy for creep-resistant high temperature applications, and methods of making
Martin Detrois, Salem, OR (US); Paul D. Jablonski, Salem, OR (US); and Jeffrey A. Hawk, Salem, OR (US)
Assigned to Battelle Memorial Institute, Columbus, OH (US)
Filed by Battelle Memorial Institute, Columbus, OH (US)
Filed on Oct. 19, 2023, as Appl. No. 18/490,286.
Application 18/490,286 is a division of application No. 17/511,594, filed on Oct. 27, 2021, granted, now 11,827,955.
Claims priority of provisional application 63/125,888, filed on Dec. 15, 2020.
Prior Publication US 2024/0043967 A1, Feb. 8, 2024
Int. Cl. C22F 1/10 (2006.01); C22C 19/05 (2006.01)

CPC C22C 19/055 (2013.01) [C22F 1/10 (2013.01)]

18 Claims

1. A method of homogenizing a nickel alloy comprising Cr and Nb, comprising at least two of the sequential steps of treating the nickel alloy:

1030±25° C. for 0.5 to 5 h;

1065±25° C. for 1.5 to 10 h;

1090±25° C. for 1.5 to 10 h;

1115±25° C. for 1.5 to 10 h;

1135±25° C. for 3 to 15 h; and

1150±25° C. for 30 to 150 h;

wherein the nickel alloy is characterizable by a level of chemical homogeneity, defined as variations between local and nominal chemistry following homogenizing, of less than ±10%; and

an aging heat treatment comprising: 820±30° C. for 5 to 100 h followed by cooling to 750±15° C. at a rate of 1 to 5° C./min and then holding at 750±15° C. for 2 to 15 h.