# US 2014/0154094 A1 · Nickel alloy and articles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154094 A1 - Document ID: US20140154094A1 - Status: Published application - Kind: A1 - Application number: 14/105,550 - Filed: 2013-12-13 - Published: 2014-06-05 - Earliest claimed: 2010-07-27 - Assignees: General Electric Copmpany - Applicants: General Electric Copmpany - Inventors: Richard DiDomizio; Judson Sloan Marte; Pazhayannur Ramanathan Subramanian - Web page: https://patentgrep.com/patent/US20140154094A1 ## CPC - C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%} - C22C 19/03: based on nickel - C22C 19/05: with chromium - C22C 19/07: based on cobalt - C22F 1/10: of nickel or cobalt or alloys based thereon - C22C: ALLOYS (treatment of alloys C21D, C22F) - C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00) ## Abstract Articles suitable for use in high temperature applications, such as turbomachinery components, and methods for making such articles, are provided. One embodiment is an article. The article comprises a material comprising a plurality of L12-structured gamma-prime phase precipitates distributed within a matrix phase at a concentration of at least 20% by volume, wherein the gamma-prime phase precipitates are less than 1 micrometer in size, and a plurality of A3-structured eta phase precipitates distributed within the matrix phase at a concentration in the range from about 1% to about 25% by volume. The solvus temperature of the eta phase is higher than the solvus temperature of the gamma-prime phase. Moreover, the material has a median grain size less than 10 micrometers. ## Claims ### Claim 1 An article comprising: a material 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, a plurality of L12-structured ordered gamma-prime phase precipitates distributed within a matrix phase at a concentration of at least 20% by volume, wherein the gamma-prime phase precipitates are less than 1 micrometer in size, and a plurality of A3-structured ordered eta phase precipitates distributed within the matrix phase at a concentration in the range from about 3% to about 25% by volume, wherein a solvus temperature of the eta phase is higher than a solvus temperature of the gamma-prime phase, wherein the material has a median grain size less than 10 micrometers. ### Claim 2 (depends on 1) The article of claim 1, wherein the eta phase solvus temperature is greater than about 1100 degrees Celsius. ### Claim 3 (depends on 1) The article of claim 1, wherein the concentration of eta phase is in the range from about 3% to about 15% by volume. ### Claim 4 (depends on 1) The article of claim 1, wherein the concentration of eta phase is in the range from about 5% to about 10% by volume. ### Claim 5 (depends on 1) The article of claim 1, wherein the plurality of eta phase precipitates have a mean aspect ratio less than about 30. ### Claim 6 (depends on 1) The article of claim 1, wherein the plurality of eta phase precipitates has a median size less than about five times the grain size of the material. ### Claim 7 (depends on 1) The article of claim 1, wherein the plurality of eta phase precipitates has a median size less than about three times the grain size of the material. ### Claim 8 (depends on 1) The article of claim 1, wherein the material has a median grain size of less than 3 micrometers. ### Claim 9 (depends on 1) The article of claim 1, wherein the material has a median grain size of less than 1 micrometer. ### Claim 10 (depends on 1) The article of claim 1, wherein the material further comprises from about 2% to about 8% tantalum, from about 11.5% to about 15% chromium, from about 15% to about 30% cobalt, from about 0.02% to about 0.2% carbon, from about 0.01% to about 0.05% boron, from about 0.02% to about 0.1% zirconium up to about 7% molybdenum, up to about 2% niobium, and up to about 1% hafnium. ### Claim 11 (depends on 1) The article of claim 1, wherein the material comprises, in weight percent, from about 3% to about 6% titanium, from about 4% to about 6% tantalum, from about 2% to about 3.5% aluminum, from about 11.5% to about 13% chromium, from about 16% to about 20% cobalt, from about 0.03% to about 0.1% carbon, from about 0.02% to about 0.08% zirconium from about 1% to about 4% molybdenum, from about 0.75% to about 1.25% niobium, from about 2% to about 5% tungsten, and from about 0.1% to about 0.6% hafnium. ### Claim 12 (depends on 1) The article of claim 1, wherein the ratio of titanium to aluminum is in the range from about 1.25 to about 3. ### Claim 13 (depends on 1) The article of claim 1, wherein the ratio of titanium to aluminum is in the range from about 1.5 to about 2.5. ### Claim 14 (depends on 1) The article of claim 1, wherein the article comprises a component for a gas turbine assembly. ### Claim 15 (depends on 14) The article of claim 14, wherein the component is a disk, a wheel, a vane, a compressor blade, a shroud, or a combustor component. ### Claim 16 An article comprising: a material comprising, in weight percent, at least about 40% nickel, from about 3% to about 6% titanium, from about 4% to about 6% tantalum, from about 2% to about 3.5% aluminum, from about 11.5% to about 13% chromium, from about 16% to about 20% cobalt, from about 0.03% to about 0.1% carbon, from about 0.02% to about 0.08% zirconium from about 1% to about 4% molybdenum, from about 0.75% to about 1.25% niobium, from about 2% to about 5% tungsten, and from about 0.1% to about 0.6% hafnium, wherein a weight ratio of titanium to aluminum is in the range from about 1 to about 4; wherein the material further comprises a plurality of L12-structured ordered gamma-prime phase precipitates distributed within a matrix phase at a concentration of at least 20% by volume, wherein the gamma-prime phase precipitates are less than 1 micrometer in size, and a plurality of A3-structured ordered eta phase precipitates distributed within the matrix phase at a concentration in the range from about 3% to about 25% by volume, wherein a solvus temperature of the eta phase is higher than a solvus temperature of the gamma-prime phase, wherein the material has a median grain size less than 3 micrometers, and wherein the plurality of eta phase precipitates has a median size less than about five times the grain size of the material.