Patents by Inventor John R. Mihalisin
John R. Mihalisin 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: 8241560Abstract: A single crystal nickel base superalloy consists essentially of, in weight %, about 6.4% to about 6.8% Cr, about 9.3% to about 10.0% Co, above 6.7% to about 8.5% Ta, about 5.45% to about 5.75% Al, about 6.2% to about 6.6% W, about 0.5% to about 0.7% Mo, about 0.8% to about 1.2% Ti, about 2.8% to about 3.2% Re, up to about 0.12% Hf, about 0.01% to about 0.08% by weight C, up to about 0.10% B, and balance Ni and incidental impurities. The superalloy provides improved alloy cleanliness and castability while providing improved high temperature mechanical properties such as stress rupture life.Type: GrantFiled: April 28, 2003Date of Patent: August 14, 2012Assignee: Howmet CorporationInventors: John Corrigan, Michael G. Launsbach, John R. Mihalisin
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Publication number: 20080163962Abstract: Directionally solidified columnar grain nickel base alloy casting consisting essentially of, in weight %, of about 11.6% to 12.70% Cr, about 8.50 to 9.5% Co, about 1.65% to 2.15% Mo, about 3.5% to 4.10% W, about 4.80% to 5.20% Ta, about 3.40 to 3.80% Al, about 3.9% to 4.25% Ti, about 0.05% to 0.11% C, about 0.003% to 0.015% B, balance essentially Ni and having substantial transverse stress rupture strength and ductility as compared to a similar casting without boron present.Type: ApplicationFiled: August 4, 2005Publication date: July 10, 2008Inventors: John Corrigan, Russell G. Vogt, John R. Mihalisin, John K. Bennett, Uwe Paul, Christoph Mayr, Winfried Esser
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Publication number: 20040213693Abstract: A single crystal nickel base superalloy consists essentially of, in weight %, about 6.4% to about 6.8% Cr, about 9.3% to about 10.0% Co, above 6.7% to about 8.5% Ta, about 5.45% to about 5.75% Al, about 6.2% to about 6.6% W, about 0.5% to about 0.7% Mo, about 0.8% to about 1.2% Ti, about 2.8% to about 3.2% Re, up to about 0.12% Hf, about 0.01% to about 0.08% by weight C, up to about 0.10% B, and balance Ni and incidental impurities. The superalloy provides improved alloy cleanliness and castability while providing improved high temperature mechanical properties such as stress rupture life.Type: ApplicationFiled: April 28, 2003Publication date: October 28, 2004Inventors: John Corrigan, Michael G. Launsbach, John R. Mihalisin
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Publication number: 20040011439Abstract: Directionally solidified columnar grain nickel base alloy casting consisting essentially of, in weight %, of about 11.6% to 12.70% Cr, about 8.50 to 9.5% Co, about 1.65% to 2.15% Mo, about 3.5% to 4.10% W, about 4.80% to 5.20% Ta, about 3.40 to 3.80% Al, about 3.9% to 4.25% Ti, about 0.05% to 0.11% C, about 0.003% to 0.015% B, balance essentially Ni and having substantial transverse stress rupture strength and ductility as compared to a similar casting without boron present.Type: ApplicationFiled: May 5, 2003Publication date: January 22, 2004Applicants: Howmet Research Corporation, Siemens AktiengesellschaftInventors: John Corrigan, Russell G. Vogt, John R. Mihalisin, John K. Bennett, Uwe Paul, Christoph Mayr, Winfried Esser
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Publication number: 20040007296Abstract: A single crystal casting is cast from a nickel base superalloy including Cr, Co, Mo, W, Ta, Al, Ti, Re and Hf as alloying elements with C increased effective to substantially reduce formation of a solidification-driven, as-cast eutectic/secondary phase scale metallurgically bonded to the casting when the alloy is cast as a single crystal and to reduce recrystallized grains when the casting is solution heat treated.Type: ApplicationFiled: July 11, 2003Publication date: January 15, 2004Applicant: Howmet Research CorporationInventors: John R. Mihalisin, John Corrigan, Gilbert M. Gratti, Russell G. Vogt
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Publication number: 20020007877Abstract: A single crystal casting is cast from a nickel base superalloy including Cr, Co, Mo, W, Ta, Al, Ti, Re and Hf as alloying elements with C increased effective to substantially reduce formation of a solidification-driven, as-cast eutectic/secondary phase scale metallurgically bonded to the casting when the alloy is cast as a single crystal and to reduce recrystallized grains when the casting is solution heat treated.Type: ApplicationFiled: March 26, 1999Publication date: January 24, 2002Inventors: JOHN R. MIHALISIN, JOHN CORRIGAN, GILBERT M. GRATTI, RUSSELL G. VOGT
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Patent number: 6231692Abstract: Machineable nickel base alloy casting, consisting essentially of, in weight %, about 12.5% to 15% Cr, about 9.00% to 10.00% Co, about 3.70% to 4.30% Mo, about 3.70% to 4.30% W, about 2.80% to 3.20% Al, about 4.80% to 5.20% Ti, about 0.005% to 0.02% B, up to about 0.10% Zr, and balance essentially Ni and carbon below about 0.08 weight % to improve machinability while retaining alloy strength properties after appropriate heat treatment.Type: GrantFiled: January 28, 1999Date of Patent: May 15, 2001Assignees: Howmet Research Corporation, Siemens AktiengesellschaftInventors: Russell G. Vogt, John Corrigan, John R. Mihalisin, Ursula Pickert, Winfried Esser
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Patent number: 5922148Abstract: Directionally solidified superalloy components having a bulk sulfur concentration of less than 1 part per million by weight are provided by vacuum melting a charge to form a superalloy melt, desulfurizing the melt by contact with a calcium-bearing desulfurizing agent for a time to reduce sulfur concentration of the melt to less than 1 ppm by weight, casting the melt directly or following solidification and remelting in a ceramic investment mold, and directionally solidifying the melt as cast components without adverse bulk sulfur pick-up subsequent to desulfurization to provide castings having a sulfur content below 1 ppm, such as in the range of hundreds of parts per billion to provide significantly improved oxidation resistance.Type: GrantFiled: February 25, 1997Date of Patent: July 13, 1999Assignee: Howmet Research CorporationInventors: Jeffrey D. Irvine, Russell G. Vogt, Donald L. Bierstine, Christine M. Stabile, John R. Mihalisin, Jeffery S. Smith, John P. Kunkle, Gail R. Cole, Thomas W. Nielsen
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Patent number: 5759303Abstract: A nickel base superalloy composition consisting essentially of, in weight %, 9.3-10.0% Co, 6.4-6.8% Cr, 0.5-0.7% Mo, 6.2-6.6% W, 6.3-6.7% Ta, 5.45-5.75% Al, 0.8-1.2% Ti, 0.07-0.12% Hf, 2.8-3.2% Re, and balance essentially Ni wherein a carbon concentration of about 0.01 to about 0.08 weight % is provided for improving the cleanliness of a single crystal investment casting produced therefrom.Type: GrantFiled: August 21, 1996Date of Patent: June 2, 1998Assignee: Howmet Research CorporationInventors: John R. Mihalisin, John Corrigan, Robert J. Baker, Eric L. Leonard, Jay L. Vandersluis
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Patent number: 5549765Abstract: A nickel base superalloy composition consisting essentially of, in weight %, 9.3-10.0% Co, 6.4-6.8% Cr, 0.5-0.7% Mo, 6.2-6.6% W, 6.3-6.7% Ta, 5.45-5.75% Al, 0.8-1.2% Ti, 0.07-0.12% Hf, 2.8-3.2% Re, and balance essentially Ni wherein a carbon concentration of about 0.01 to about 0.08 weight % is provided for improving the cleanliness of a single crystal investment casting produced therefrom.Type: GrantFiled: February 16, 1995Date of Patent: August 27, 1996Assignee: Howmet CorporationInventors: John R. Mihalisin, John Corrigan, Robert J. Baker, Eric L. Leonard, Jay L. Vandersluis
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Patent number: 4994236Abstract: A method of making high melting point alloys. The reactive and non-reactive charge materials are separately refined as initial alloys, generally as an alloy of a base element selected from the iron group of the Periodic Table, such as nickel, and at least one metallic element other than the base element. At least one first initial alloy and at least one second initial alloy are provided. The metallic elements other than the base element in the first initial alloys are relatively non-reactive in the molten state, whereas the metallic elements in the second initial alloys are relatively reactive in the molten state. Amounts of the first and second initial alloys are selected to yield a predetermined composition of the high melting point alloy upon melting. The selected amounts are melted to form a molten mixture having the predetermined composition, and then the molten mixture is solidified.Type: GrantFiled: February 15, 1989Date of Patent: February 19, 1991Assignee: Howmet CorporationInventors: John R. Mihalisin, Michelle K. Tripucka
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Patent number: 4401622Abstract: A nickel-chromium-iron alloy intended principally for automotive turbocharger applications, the alloy being characterized by good stress - rupture strength, ductility, tensile strength, etc. and containing, generally speaking, 10-15% Cr, 18-30% Fe, 3-4.25% Ti, 2.25-3.5% Al, Ti+Al from 6 to 7.25%, ratio of Ti to Al of at least 0.9 and up to 1.6, 4-6% Mo, 0.01-0.2% B, 0.03-0.3% C, balance essentially nickel.Type: GrantFiled: April 20, 1981Date of Patent: August 30, 1983Assignees: The International Nickel Co., Inc., Howmet CorporationInventors: Raymond C. Benn, John R. Mihalisin, Leroy R. Curwick, Howard F. Merrick
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Patent number: 4140555Abstract: A nickel-base casting superalloy consisting essentially (by weight of the alloy) of 7% to 25% chromium, 02.% to 7% aluminum, 0.2% to 6% titanium, 0.01% to 0.25% carbon, up to 0.2% zirconium, up to 0.15% boron, up to 3% hafnium, at least 5% of a matrix-strengthening element selected from the group consisting of 0 to 25% cobalt, 0 to 10% molybdenum, 0 to 13% tungsten to 6% tantalum, 0 to 5% columbium, and 0 to 1.5% vanadium, a carbide shape controller selected from 0.022% to 0.15% magnesium, 0.005% to 0.Type: GrantFiled: November 7, 1977Date of Patent: February 20, 1979Assignee: Howmet CorporationInventors: Willard Garcia, Jerry A. Butzer, John R. Mihalisin, Gerald W. Hulit