Patents by Inventor Pazhayannur Ramanathan Subramanian
Pazhayannur Ramanathan Subramanian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11926880Abstract: Methods for forming a dual-phase magnetic component from an initial component comprising a non-magnetic austenite composition are provided. The method may include: forming a coating on a portion of the surface of the initial component to form a masked area while leaving an unmasked area thereon. Thereafter the initial component may be heated to a treatment temperature such that nitrogen diffuses out of the unmasked area of the initial component to transform the non-magnetic austenite composition to a magnetic phase in the unmasked area. Thereafter, the initial component may be cooled from the treatment temperature to form a dual-phase magnetic component having a magnetic region corresponding to the unmasked area and a non-magnetic region corresponding to the masked area.Type: GrantFiled: April 21, 2021Date of Patent: March 12, 2024Assignee: General Electric CompanyInventors: Shenyan Huang, Min Zou, Steve John Buresh, Wanming Zhang, Pazhayannur Ramanathan Subramanian
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Publication number: 20230398621Abstract: A nickel-based braze alloy composition is described, including nickel, about 1 weight % to about 5 weight % boron (B); and about 1 weight % to about 20 weight % germanium (Ge). The composition is free of any silicon. Superalloy articles that contains a crack or other type of void or gap filled with the nickel-based braze alloy composition are also described, along with methods for filling such a gap. Related articles of manufacture and brazing processes to join metal components are also disclosed.Type: ApplicationFiled: August 23, 2023Publication date: December 14, 2023Inventors: Raghavendra Rao Adharapurapu, Michael Francis Xavier Gigliotti, Jr., David Edwin Budinger, Pazhayannur Ramanathan Subramanian, Jeffrey Jon Schoonover
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Patent number: 11759877Abstract: A nickel-based braze alloy composition includes nickel, about 1 weight % to about 5 weight % boron (B); and about 1 weight % to about 20 weight % germanium (Ge). The composition is free of any silicon. Superalloy articles having a crack or other type of void or gap may be filled with the nickel-based braze alloy composition. Methods for filling such a gap are described.Type: GrantFiled: December 23, 2016Date of Patent: September 19, 2023Assignee: GENERAL ELECTRIC COMPANYInventors: Raghavendra Rao Adharapurapu, Michael Francis Xavier Gigliotti, Jr., David Edwin Budinger, Pazhayannur Ramanathan Subramanian, Jeffrey Jon Schoonover
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Patent number: 11739398Abstract: A composition includes, by weight percent: Cobalt (Co) between about 4.5 and about 7.0; Chromium (Cr) between about 10.2 and about 11.5; Molybdenum (Mo) between about 0.5 and about 2.5; Tungsten (W) between about 4.0 and about 5.5; Rhenium (Re) between about 0 and about 1.2; Aluminum (Al) between about 6.2 and about 6.8; Tantalum (Ta) between about 4.5 and about 6.0; Titanium (Ti) between about 0 and about 0.5; Hafnium (Hf) between about 0 and about 0.5; Carbon (C) between about 0 and about 0.2; Boron (B) between about 0 and about 0.02; and the balance Nickel (Ni), and other incidental impurities.Type: GrantFiled: February 11, 2021Date of Patent: August 29, 2023Assignee: General Electric CompanyInventors: Akane Suzuki, Chen Shen, Arthur Samuel Peck, Shenyan Huang, Michael Douglas Arnett, Jon Conrad Schaeffer, Pazhayannur Ramanathan Subramanian
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Publication number: 20230257864Abstract: A dual phase magnetic component, along with methods of its formation, is provided. The dual phase magnetic component may include an intermixed first region and second region formed from a single material, with the first region having a magnetic area and a diffused metal therein, and with the second region having a non-magnetic area. The second region generally has greater than 0.1 weight % of nitrogen.Type: ApplicationFiled: April 21, 2023Publication date: August 17, 2023Inventors: Shenyan Huang, Steve John Buresh, Min Zou, Wanming Zhang, Pazhayannur Ramanathan Subramanian, Deborah D. Whitis
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Patent number: 11661646Abstract: A dual phase magnetic component, along with methods of its formation, is provided. The dual phase magnetic component may include an intermixed first region and second region formed from a single material, with the first region having a magnetic area and a diffused metal therein, and with the second region having a non-magnetic area. The second region generally has greater than 0.1 weight % of nitrogen.Type: GrantFiled: April 21, 2021Date of Patent: May 30, 2023Assignee: General Electric ComapnyInventors: Shenyan Huang, Steve John Buresh, Min Zou, Wanming Zhang, Pazhayannur Ramanathan Subramanian, Deborah D. Whitis
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Publication number: 20220340987Abstract: Methods for forming a dual-phase magnetic component from an initial component comprising a non-magnetic austenite composition are provided. The method may include: forming a coating on a portion of the surface of the initial component to form a masked area while leaving an unmasked area thereon. Thereafter the initial component may be heated to a treatment temperature such that nitrogen diffuses out of the unmasked area of the initial component to transform the non-magnetic austenite composition to a magnetic phase in the unmasked area. Thereafter, the initial component may be cooled from the treatment temperature to form a dual-phase magnetic component having a magnetic region corresponding to the unmasked area and a non-magnetic region corresponding to the masked area.Type: ApplicationFiled: April 21, 2021Publication date: October 27, 2022Inventors: Shenyan Huang, Min Zou, Steve John Buresh, Wanming Zhang, Pazhayannur Ramanathan Subramanian
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Publication number: 20220341020Abstract: A dual phase magnetic component, along with methods of its formation, is provided. The dual phase magnetic component may include an intermixed first region and second region formed from a single material, with the first region having a magnetic area and a diffused metal therein, and with the second region having a non-magnetic area. The second region generally has greater than 0.1 weight % of nitrogen.Type: ApplicationFiled: April 21, 2021Publication date: October 27, 2022Inventors: Shenyan Huang, Steve John Buresh, Min Zou, Wanming Zhang, Pazhayannur Ramanathan Subramanian, Deborah D. Whitis
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Publication number: 20220251686Abstract: A composition includes, by weight percent: Cobalt (Co) between about 4.5 and about 7.0; Chromium (Cr) between about 10.2 and about 11.5; Molybdenum (Mo) between about 0.5 and about 2.5; Tungsten (W) between about 4.0 and about 5.5; Rhenium (Re) between about 0 and about 1.2; Aluminum (Al) between about 6.2 and about 6.8; Tantalum (Ta) between about 4.5 and about 6.0; Titanium (Ti) between about 0 and about 0.5; Hafnium (Hf) between about 0 and about 0.5; Carbon (C) between about 0 and about 0.2; Boron (B) between about 0 and about 0.02; and the balance Nickel (Ni), and other incidental impurities.Type: ApplicationFiled: February 11, 2021Publication date: August 11, 2022Inventors: Akane Suzuki, Chen Shen, Arthur Samuel Peck, Shenyan Huang, Michael Douglas Arnett, Jon Conrad Schaeffer, Pazhayannur Ramanathan Subramanian
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Publication number: 20190218650Abstract: A method of forming titanium-based spherical metallic particles includes performing a hydride-dehydride process on a meltless metallic sponge to form a feedstock material including a metallic powder. The method further includes introducing the feedstock material into a microwave plasma discharge to form the titanium-based spherical metallic particles.Type: ApplicationFiled: January 12, 2018Publication date: July 18, 2019Inventors: Pazhayannur Ramanathan Subramanian, Anthony Joseph Vinciquerra, Bernard Patrick Bewlay
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Publication number: 20190217395Abstract: A method of forming titanium-based spherical metallic particles includes contacting a feedstock material including a metal halide with a reductant in the presence of a microwave plasma discharge.Type: ApplicationFiled: January 12, 2018Publication date: July 18, 2019Inventors: Pazhayannur Ramanathan Subramanian, Anthony Joseph Vinciquerra, Laura Cerully Dial, Steven Jude Duclos
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Publication number: 20180230576Abstract: In some embodiments, a gamma titanium aluminide alloy consists essentially of, in atomic percent, 38 to about 50% aluminum, 1 to about 6% niobium, 0.25 to about 2% tungsten, 0.01 to about 1.5% boron, up to about 1% carbon, optionally up to about 2% chromium, optionally up to about 2% vanadium, up to about 2% manganese, and the balance titanium and incidental impurities. In some embodiments, the gamma titanium aluminide alloy forms at least a portion of a gas turbine component. In some embodiments, a gamma titanium aluminide alloy, consists essentially of, in atomic percent, about 40 to about 50% aluminum, about 1 to about 5% niobium, about 0.3 to about 1% tungsten, about 0.1 to about 0.3% boron, up to about 0.1% carbon, up to about 2% chromium, up to about 2% vanadium, up to about 2% manganese, up to about 1% molybdenum, and the balance titanium and incidental impurities.Type: ApplicationFiled: February 14, 2017Publication date: August 16, 2018Inventors: Stephen Joseph BALSONE, Dwight Eric DAVIDSON, Michael Francis Xavier GIGLIOTTI, JR., Pazhayannur Ramanathan SUBRAMANIAN, Akane SUZUKI
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Publication number: 20180230822Abstract: In some embodiments, a gamma titanium aluminide alloy consists essentially of, in atomic percent, about 38 to about 50% aluminum, about 6% niobium, about 0.25 to about 2% tungsten, optionally up to about 1.5% boron, about 0.01 to about 1.0% carbon, optionally up to about 2% chromium, optionally up to about 2% vanadium, optionally up to about 2% manganese, and the balance titanium and incidental impurities. In some embodiments, the gamma titanium aluminide alloy forms at least a portion of a gas turbine component. In some embodiments, a gamma titanium aluminide alloy, consisting essentially of, in atomic percent, about 40 to about 50% aluminum, about 3 to about 5% niobium, about 0.5 to about 1.5% tungsten, about 0.01 to about 1.5% boron, about 0.01 to about 1.0% carbon, optionally up to about 2% chromium, optionally up to about 2% vanadium, optionally up to about 2% manganese, and the balance titanium and incidental impurities.Type: ApplicationFiled: February 14, 2017Publication date: August 16, 2018Inventors: Stephen Joseph BALSONE, Dwight Eric DAVIDSON, Michael Francis Xavier GIGLIOTTI, JR., Pazhayannur Ramanathan SUBRAMANIAN, Akane SUZUKI
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Publication number: 20180178303Abstract: A nickel-based braze alloy composition is described, including nickel, about 1 weight % to about 5 weight % boron (B); and about 1 weight % to about 20 weight % germanium (Ge). The composition is free of any silicon. Superalloy articles that contains a crack or other type of void or gap filled with the nickel-based braze alloy composition are also described, along with methods for filling such a gap. Related articles of manufacture and brazing processes to join metal components are also disclosed.Type: ApplicationFiled: December 23, 2016Publication date: June 28, 2018Inventors: Raghavendra Rao Adharapurapu, Michael Francis Xavier Gigliotti, JR., David Edwin Budinger, Pazhayannur Ramanathan Subramanian, Jeffrey Jon Schoonover
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Patent number: 9562276Abstract: 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.Type: GrantFiled: December 13, 2013Date of Patent: February 7, 2017Assignee: General Electric CompanyInventors: Richard DiDomizio, Judson Sloan Marte, Pazhayannur Ramanathan Subramanian
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Patent number: 9511436Abstract: A composite composition that includes an MCrAlX alloy and a nano-oxide ceramic is disclosed. In the formula, M includes nickel, cobalt, iron, or a combination thereof, and X includes yttrium, hafnium, or a combination thereof, from about 0.001 percent to about 2 percent by weight of the alloy. The amount of the nano-oxide ceramic is greater than about 40 percent, by volume of the composition. A protective covering that includes the composite composition is also disclosed. The protective covering can be attached to a tip portion of a blade with a braze material. A method for joining a protective covering to a tip portion of a blade, and a method for repair of a blade, are also provided.Type: GrantFiled: November 8, 2013Date of Patent: December 6, 2016Assignee: General Electric CompanyInventors: Sundeep Kumar, Anand Krishnamurthy, Kivilcim Onal, Pazhayannur Ramanathan Subramanian, Dennis Michael Gray, Padmaja Parakala
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Publication number: 20160201167Abstract: Rhenium-free nickel based alloys are provided. More particularly, the alloys comprise preferred levels and ratios of elements so as to achieve good high temperature strength of both gamma matrix phase and gamma prime precipitates, as well as good environmental resistance, without using rhenium. When cast and directionally solidified into single crystal form, the alloys exhibit creep and oxidation resistance substantially equivalent to or better than rhenium-bearing single-crystal alloys. Further, the alloys can be processed by directional solidification into articles in single crystal form or columnar structure comprising fine dendrite arm spacing, e.g., less than 400 ?m, if need be, so that further improvements in mechanical properties in the articles can be seen.Type: ApplicationFiled: January 11, 2016Publication date: July 14, 2016Applicant: General Electric CompanyInventors: Akane Suzuki, Michael Francis Xavier Gigliotti, JR., Shyh-Chin Huang, Pazhayannur Ramanathan Subramanian
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Publication number: 20150132605Abstract: A composite composition that includes an MCrAlX alloy and a nano-oxide ceramic is disclosed. In the formula, M includes nickel, cobalt, iron, or a combination thereof, and X includes yttrium, hafnium, or a combination thereof, from about 0.001 percent to about 2 percent by weight of the alloy. The amount of the nano-oxide ceramic is greater than about 40 percent, by volume of the composition. A protective covering that includes the composite composition is also disclosed. The protective covering can be attached to a tip portion of a blade with a braze material. A method for joining a protective covering to a tip portion of a blade, and a method for repair of a blade, are also provided.Type: ApplicationFiled: November 8, 2013Publication date: May 14, 2015Applicant: General Electric CompanyInventors: Sundeep Kumar, Anand Krishnamurthy, Kivilcim Onal, Pazhayannur Ramanathan Subramanian, Dennis Michael Gray, Padmaja Parakala
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Publication number: 20140154094Abstract: 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.Type: ApplicationFiled: December 13, 2013Publication date: June 5, 2014Applicant: General Electric CopmpanyInventors: Richard DiDomizio, Judson Sloan Marte, Pazhayannur Ramanathan Subramanian
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Patent number: 8608877Abstract: Articles that include a material that has L12-structured gamma-prime phase precipitates within a matrix phase at a concentration of at least 20% by volume are disclosed. The gamma-prime phase precipitates are less than 1 micrometer in size. The material also has 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 articles may be formed by mechanically working a workpiece that has at least about 40% nickel, about 1.5% to about 8% titanium, and about 1.5% to about 4.5% aluminum. The workpiece may be worked at a temperature below a solvus temperature of the eta phase; and then heat treated at a temperature sufficient to dissolve any gamma prime phase present in the workpiece but below the solvus temperature of the eta phase.Type: GrantFiled: July 27, 2010Date of Patent: December 17, 2013Assignee: General Electric CompanyInventors: Richard DiDomizio, Judson Sloan Marte, Pazhayannur Ramanathan Subramanian