# US 10,767,246 B2 · Enhanced superalloys by zirconium addition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,246 B2 - Document ID: US10767246B2 - Status: Granted - Kind: B2 - Application number: 15/504,777 - Filed: 2015-08-17 - Published: 2018-08-09 - Granted: 2020-09-08 - Earliest claimed: 2014-08-18 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: David Paul Mourer; Andrew Ezekiel Wessman - Web page: https://patentgrep.com/patent/US10767246B2 ## CPC - C22C 19/056: {with the maximum Cr content being at least 10% but less than 20%} - F01D 5/02: Blade-carrying members, e.g. rotors (rotors of non-bladed type F01D1/34; stators F01D9/00 {; selecting particular materials F01D5/28}) - F01D 25/005: {Selecting particular materials} - F01D 5/3007: {of axial insertion type} - F05D 2220/32: in gas turbines - F05D 2300/175: Superalloys - C22C: ALLOYS (treatment of alloys C21D, C22F) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A gamma prime nickel-based superalloy is provided, which can include a combination of Ti and Zr in a total weight amount sufficient to form cellular precipitates located at grain boundaries of the alloy, wherein the cellular precipitates define gamma prime arms that distort the grain boundaries at which they are located. The Hf-containing, gamma prime nickel-based superalloy and/or the gamma prime nickel-based superalloy can include cellular precipitates that are predominantly located at grain boundaries of the alloy such that the cellular precipitates define gamma prime arms that distort the grain boundaries at which they are located. The superalloys can further include finer gamma prime precipitates (e.g., cuboidal or spherical precipitates) than the cellular precipitates. ## Claims ### Claim 1 A Hf-containing, gamma prime nickel-based superalloy, comprising: about 10 wt % to about 22 wt % cobalt; about 9 wt % to about 14 wt % chromium; 0 wt % to about 10 wt % tantalum; about 2 wt % to about 6 wt % aluminum; about 2 wt % to about 6 wt % titanium; about 1.5 wt % to about 6 wt % tungsten; about 1.5 wt % to about 5.5 wt % molybdenum; 1.3 wt % to 3.2 wt % niobium; about 0.01 wt % to 0.8 wt % hafnium; about 0.02 wt % to about 0.1 wt % carbon; about 0.01 wt % to about 0.4 wt % boron; about 0.15 wt % to about 1.3 wt % zirconium; and the balance nickel and impurities. ### Claim 2 (depends on 1) The Hf-containing, gamma prime nickel-based superalloy as in claim 1, wherein the total amount of hafnium and zirconium in the gamma prime nickel-based superalloy is about 0.3 wt % to about 1.5 wt %. ### Claim 3 (depends on 1) The Hf-containing, gamma prime nickel-based superalloy as in claim 1, comprising about 0.3 wt % to 0.8 wt % hafnium. ### Claim 4 (depends on 1) The Hf-containing, gamma prime nickel-based superalloy as in claim 1, comprising about 0.25 wt % to about 0.55 wt % zirconium. ### Claim 5 (depends on 1) The Hf-containing, gamma prime nickel-based superalloy as in claim 1, comprising up to 2.5% rhenium, up to 2% vanadium, up to 2% iron, and/or up to 0.1% magnesium. ### Claim 6 (depends on 1) The Hf-containing, gamma prime nickel-based superalloy according to claim 1, wherein the alloy includes cellular precipitates that are predominantly located at grain boundaries of the alloy, and wherein the cellular precipitates define gamma prime arms that distort the grain boundaries at which they are located. ### Claim 7 (depends on 6) The Hf-containing, gamma prime nickel-based superalloy according to claim 6, wherein the alloy further includes finer gamma prime precipitates than the cellular precipitates, and wherein the finer gamma prime precipitates are cuboidal or spherical. ### Claim 8 (depends on 1) A rotating component of a gas turbine engine, the rotating component being formed of the Hf-containing, gamma prime nickel-based superalloy according to claim 1. ### Claim 9 (depends on 8) The rotating component according to claim 8, wherein the rotating component is a turbine disk or a compressor disk. ### Claim 10 A Hf-containing, gamma prime nickel-based superalloy, comprising: about 10 wt % to about 22 wt % cobalt; about 9 wt % to about 14 wt % chromium; 0 wt % to about 10 wt % tantalum; about 2 wt % to about 6 wt % aluminum; about 2 wt % to about 6 wt % titanium; about 1.5 wt % to about 6 wt % tungsten; about 1.5 wt % to about 5.5 wt % molybdenum; 0 wt % to about 3.5 wt % niobium; about 0.01 wt % to about 1.0 wt % hafnium; about 0.02 wt % to about 0.1 wt % carbon; about 0.01 wt % to about 0.4 wt % boron; about 0.15 wt % to about 1.3 wt % zirconium; and the balance nickel and impurities, wherein the alloy includes cellular precipitates that are predominantly located at grain boundaries of the alloy and includes finer gamma prime precipitates than the cellular precipitates, and wherein the cellular precipitates define gamma prime arms that distort the grain boundaries at which they are located, and wherein the finer gamma prime precipitates are cuboidal or spherical, and further wherein the alloy contains about 5 to about 12 volume percent of the cellular precipitates and/or about 43 to about 50 volume percent of the finer gamma prime precipitates. ### Claim 11 A Hf-containing, gamma prime nickel-based superalloy, consisting of: about 10 wt % to about 22 wt % cobalt; about 9 wt % to about 14 wt % chromium; 4.6 wt % to about 5.6 wt % tantalum; about 2 wt % to about 6 wt % aluminum; about 2 wt % to about 6 wt % titanium; about 1.5 wt % to about 6 wt % tungsten; about 1.5 wt % to about 5.5 wt % molybdenum; 0 wt % to about 3.5 wt % niobium; about 0.01 wt % to about 1.0 wt % hafnium; about 0.02 wt % to about 0.1 wt % carbon; about 0.01 wt % to about 0.4 wt % boron; about 0.15 wt % to about 1.3 wt % zirconium; and the balance nickel and impurities. ### Claim 12 A gamma prime nickel-based superalloy, comprising: 0 wt % to about 21 wt % cobalt; about 10 wt % to about 30 wt % chromium; 0 wt % to about 4 wt % tantalum; 0.1 wt % to about 5 wt % aluminum; 0.1 wt % to about 10 wt % titanium; 0 wt % to about 14 wt % tungsten; 0 wt % to about 15 wt % molybdenum; 0 wt % to about 40 wt % iron; 0 wt % to about 1 wt % manganese; 0 wt % to about 1 wt % silicon; 0 wt % to about 5 wt % niobium; 0 wt % to about 0.01 wt % hafnium; 0 wt % to about 0.35 wt % carbon; 0 wt % to about 0.35 wt % boron; about 0.25 wt % to about 1.3 wt % zirconium; and the balance nickel and impurities, wherein the gamma prime nickel-based superalloy includes at least 4 wt % of a combined amount of aluminum and titanium, and wherein the gamma prime nickel-based superalloy includes tungsten, niobium, or a mixture thereof, wherein the alloy includes cellular precipitates that are predominantly located at grain boundaries of the alloy, and wherein the cellular precipitates define gamma prime arms that distort the grain boundaries at which they are located. ### Claim 13 (depends on 12) The gamma prime nickel-based superalloy as in claim 12, comprising 0 wt % to about 0.008 wt % hafnium. ### Claim 14 (depends on 12) The gamma prime nickel-based superalloy as in claim 12, wherein the gamma prime nickel-based supper alloy is free from hafnium. ### Claim 15 (depends on 12) The gamma prime nickel-based superalloy as in claim 12 comprising about 0.25 wt % to about 0.55 wt % zirconium. ### Claim 16 (depends on 12) The gamma prime nickel-based superalloy as in claim 12, comprising up to 2.5% rhenium, up to 2% vanadium, up to 2% iron, and/or up to 0.1% magnesium. ### Claim 17 (depends on 12) The gamma-prime nickel-base alloy according to claim 12, wherein the combined amount of aluminum and titanium present in the gamma-prime nickel-base alloy is about 4 wt % to about 15 wt %. ### Claim 18 (depends on 12) The gamma-prime nickel-base alloy according to claim 12, wherein the alloy further includes finer gamma prime precipitates than the cellular precipitates, and wherein the finer gamma prime precipitates are cuboidal or spherical. ### Claim 19 (depends on 18) The gamma-prime nickel-base alloy according to claim 18, wherein the alloy contains about 5 to about 12 volume percent of the cellular precipitates and/or about 43 to about 50 volume percent of the finer gamma prime precipitates. ### Claim 20 (depends on 12) A rotating component of a gas turbine engine, the rotating component being formed of the gamma-prime nickel-base alloy according to claim 12. ### Claim 21 (depends on 20) The rotating component according to claim 20, wherein the rotating component is a turbine disk or a compressor disk.