Molybdenum Or Tungsten Containing Patents (Class 420/448)
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Patent number: 5294239Abstract: In section bars and shaped bodies made of nickel-base superalloys having a structure consisting of columnar grains, a complete recrystallization cannot be effected unless the heating-up rate is kept below a maximum heating-up rate T.sub.max, which depends on the ratio V of one or more of the metal carbide-forming elements hafnium, niobium, tantalum, titanium and zirconium to one or both of the metal carbide-forming elements tungsten and molybdenum.Type: GrantFiled: May 6, 1991Date of Patent: March 15, 1994Assignee: PM Hochtemperatur-Metall GmbHInventors: Klaus Zoltzer, Klaus Lempenauer, Hellmut Fischmeister
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Patent number: 5217684Abstract: A precipitation-hardening-type Ni-base alloy exhibiting improved resistance to stress corrosion cracking in a sour gas atmosphere containing elemental sulfur at high temperatures is disclosed. The alloy consists essentially of, by weight %;______________________________________ Cr: 12-25%, Mo: over 9.0 and up to 15%, Nb: 4.0-6.0%, Fe: 5.0-25%, Ni: 45-60%, C: 0.050% or less, Si: 0.50% or less, Mn: 1.0% or less, P: 0.025% or less, S: 0.0050% or less, N: 0.050% or less, Ti: 0.46-1.0%, Al: 0-2.0%.Type: GrantFiled: November 30, 1990Date of Patent: June 8, 1993Assignee: Sumitomo Metal Industries, Ltd.Inventors: Masaaki Igarashi, Shiro Mukai, Yasutaka Okada, Akio Ikeda
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Patent number: 5173255Abstract: One form of an improved cast, hollow, columnar grain nickel base alloy article is provided with outstanding elevated temperature stability as represented by oxidation resistance, an improved combination of longitudinal and transverse stress rupture properties, and a thin wall of less than about 0.035 inch, substantially free of cracks. Described is a heat treatment in combination with an alloy for providing such an article.Type: GrantFiled: April 17, 1991Date of Patent: December 22, 1992Assignee: General Electric CompanyInventors: Earl W. Ross, Kevin S. O'Hara
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Patent number: 5171380Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 8 Cr 13 Mo 3.5 Al 3.5 Ti 2.5 Ta 3.5 Nb 3.5 Zr 0.06 C 0.05 B 0.Type: GrantFiled: June 9, 1989Date of Patent: December 15, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5156808Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 3.35 Ti 5.90 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: September 4, 1990Date of Patent: October 20, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5154884Abstract: A nickel-base superalloy, particularly adapted for use in gas turbine engine single crystal blades and vanes is provided with a specific composition and heat treated in a particular manner to exhibit an improved balance of critical high temperature mechanical properties and resistance to oxidation and hot corrosion significantly superior to presently available alloys. In its broad form, the alloy composition comprises, by weight, 7-12% Cr, 1-5% Mo, 3-5% Ti, 3-5% Al, 5-15% Co, 3-12% W, up to 10% Re, 2-6% Ta, up to 2% Cb, up to 3% V, up to 2% Hf, the balance being essentially nickel and incidental impurities. Nickel-base superalloy single crystal articles formed of the alloy are described, as is the method, including heat treatment, employed to make the article.Type: GrantFiled: September 18, 1991Date of Patent: October 13, 1992Assignee: General Electric CompanyInventors: Carl S. Wukusick, Leo Buchakjian, Jr.
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Patent number: 5141704Abstract: The improved superalloy that possesses all the characteristics required of the high-temperature structural material of high-temperature gas-cooled reactors (i.e., high-temperature strength, corrosion resistance, good productibility, good hot workability and resistance to embrittlement due to thermal aging) consists essentially of 16-28% Cr. 15-24% W (provided that Cr+W=39-44%), 0.01-0.1% Zr, 0.001-0.015% Y, 0.0005-0.01% B, up to 0.05% C, up to 0.1% Si, up to 0.1% Mn (provided that Si+Mn.gtoreq.0.1%), up to 0.1% Ti, up to 0.1% Al and up to 0.1% Nb (provided that Ti+Al.gtoreq.0.1% and Ti+Al+Nb.gtoreq.0.15%), with the balance being Ni and inevitable impurities and all percentages being on a weight basis.Type: GrantFiled: July 26, 1991Date of Patent: August 25, 1992Assignee: Japan Atomic Energy Res. InstituteInventors: Tatsuo Kondo, Hajime Nakajima, Masami Shindo, Hirokazu Tsuji, Ryohei Tanaka, Susumu Isobe, Sadao Ohta, Rikizo Watanabe
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Patent number: 5131961Abstract: A method of forming a Ni-base superalloy suitable for use as the material for gas turbine disks or the like has a composition containing, by weight, 0.01 to 0.15% of C, 15 to 22% of Cr, 3 to 6% of Mo, 3 to 6% of W, 5 to 15% of Co, 1.0 to 1.9% of Al, 1.5 to 3.0% of Ti, 3.0 to 6.0% of Ta, 0.001 to 0.020% of B and the balance substantially Ni except inevitable impurities. This alloy is produced using the conventional ingot making and a hot working process including working at a reducing ratio greater than or equal to 10%, first above the .gamma. solvus temperature, and then during cooling to the recrystallization temperature and then subjected to direct aging without solid-solution treatment. As a result, the alloy exhibits excellent strength properties well comparable to those of expensive alloys produced by powder metallurgy process.Type: GrantFiled: September 27, 1989Date of Patent: July 21, 1992Assignee: Hitachi Metals, Ltd.Inventors: Koji Sato, Rikizo Watanabe
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Patent number: 5129968Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 4.9 Ti 2.0 Ta 4.7 Nb 2.3 Zr 0.06 V 1 C 0.05 B 0.Type: GrantFiled: September 28, 1988Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5129970Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 3.35 Ti 5.90 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: September 26, 1988Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5129971Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 13 Cr 16 Mo 4 Al 2.55 Ti 4.5 Ta 3.0 Nb 1.5 Zr 0.03 C 0.03 B 0.Type: GrantFiled: September 26, 1988Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5130087Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Concentration in Weight % Claimed Composition Ingredient From To ______________________________________ Ni balance Co 4 12 Cr 7 13 Mo 2 6 Al 3.0 6.0 Ti 3.5 5.0 Ta 2.0 4.0 Nb 1.0 3.0 Re 0.0 3.0 Hf 0.0 0.75 Zr 0.0 0.10 V 0.0 3.0 C 0.0 0.20 B 0.0 0.10 W 0.0 1.0 Y 0.0 0.10.Type: GrantFiled: July 30, 1990Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5129969Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 4.5 Ti 4.0 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: September 28, 1988Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5130089Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Concentration in Weight % Ingredient From To ______________________________________ Ni balance Co 12 Cr 10 16 Mo 2 6 Al 4.5 Ti 3.2 Ta 5 6 Nb 1 3 Zr 0 0.1 C 0 0.20 B 0.01 0.10 Re 0 3.0 Hf 0 0.75 V 0 0.5 W 0 1.0 Y 0 0.Type: GrantFiled: August 15, 1990Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5130086Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Concentration in weight % Ingredient From To ______________________________________ Ni balance Co 3 13 Cr 10 16 Mo 2.5 5.5 Al 2.5 4.5 Ti 1.5 3.5 Ta 2 5 Nb 2 5 Zr 0 0.1 C 0 0.1 B 0.01 0.05 W 0 1 Re 0 3 Y 0 0.2.Type: GrantFiled: August 1, 1990Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5130088Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight 5 ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 5.5 Ti 2.25 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: August 13, 1990Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5124123Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 10 Cr 15 Mo 4 Al 4 Ti 3.5 Ta 2.5 Nb 1.25 Zr 0.06 C 0.05 B 0.Type: GrantFiled: September 26, 1988Date of Patent: June 23, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5120614Abstract: A nickel-chromium-molybdenum-niobium alloy affords high resistance to aggressive corrosives, including chlorides which cause crevice corrosion and oxidizing acids which promote intergranular corrosion, the alloy also being readily weldable and possessing structural stability at very low as well as elevated temperatures. The alloy consists essentially of, (by weight), 19-23% Cr, 12-15% Mo, 2.25-4% W, 0.65-2% Nb, 2-8% Fe, balance Ni.Type: GrantFiled: October 21, 1988Date of Patent: June 9, 1992Assignee: Inco Alloys International, Inc.Inventors: Edward L. Hibner, Ralph W. Ross, Jr., James R. Crum
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Patent number: 5104614Abstract: Superalloy with a nickel base matrix having good mechanical properties when ot in respect of tensile strength, creep resistance, low cycle fatigue and resistance to crack-propagation of which the composition in percentages by weight is as follows: Cr 11 to 13; Co 8 to 17; Mo 6 to 8; Nb less than or equal to 1.5; Ti 4 to 5; Al 4 to 5; Hf less than or equal to 1; C, B, Zr each less than or equal to 500 ppm; Ni remainder to 100. The alloy can be manufactured advantageously by powder metallurgy techniques and used in the manufacture of turbo machine disks.Type: GrantFiled: June 3, 1986Date of Patent: April 14, 1992Assignees: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A.", Association pour la Recherche et le Developpement des Methodes et Processus Industriels - "A.R.M.I.N.E.S.", Tecphy, Office National d'Etudes et de Recherches Aerospatiales - "O.N.E.R.A."Inventors: Christian A. B. Ducrocq, Didier P. A. Lestrat, Bernard Paintendre, James H. Davidson, Michel Marty, Andre Walder
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Patent number: 5100616Abstract: A gamma-prime precipitation hardening nickel-base yttria particle-dispersion-strengthened superalloy having a composition consisting essentially, by weight %, of 3.5 to 6.0 % of Al, 7.0 to 10.0 % of Co, 8.0 to 10.5 % of Cr, 0.5 to 1.5 % of Ti, 4.0 to 6.5 % of Ta, 7.0 to 9.0 % of W, 1.5 to 2.5 % of Mo, 0.02 to 0.2 % of Zr, 0.001 to 0.1 % of C, 0.001 to 0.02 % of B, 0.5 to 1.7 % of Y.sub.2 O.sub.3 and the balance being Ni. It has an excellent high-temperature creep rupture strength and a good corrosion resistance at high temperatures.Type: GrantFiled: July 12, 1990Date of Patent: March 31, 1992Assignee: National Research Institute for MetalsInventors: Yozo Kawasaki, Katsuyuki Kusunoki, Shizuo Nakazawa, Michio Yamazaki
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Patent number: 5098470Abstract: An alloy mix suitable for the repair of nickel-based alloy components is disclosed. The alloy mix contains a mixture of two alloy powders. The constituents of the first powder, in percentages by weight are:______________________________________ Al 2-3 Co 9-11 Cr 8-10 Fe 0-1.8 Hf 1.0-1.5 Ta 1.-1.5 Ti 1.25-1.75 W 6-8 B 2.8-3.4 Y 0.001-0.02 Ni Remainder ______________________________________and the constituents of the second powder, in percentages by weight, are: ______________________________________ C .13-.17 Al 5.25-5.75 B 0.01-0.02 Co 9.0-11.0 Cr 8-10 Hf 1.3-1.7 Ta 2.25-2.75 Ti 1.25-1.75 W 9.5-10.5 Zr 0.03-0.Type: GrantFiled: March 13, 1991Date of Patent: March 24, 1992Assignee: Rolls-Royce plcInventors: Philip S. Wood, Peter J. Fell
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Patent number: 5080734Abstract: Improved, high strength, fatigue crack-resistant nickel-base alloys for use at elevated temperatures are disclosed. The alloys are suitable for use as turbine disks in gas turbine engines of the type used in jet engines, or for use as hub sections of dual alloy turbine disks for advanced turbine engines, maintaining stability at engine operating temperatures up to about 1500.degree. F. The alloy is characterized by a microstructure having an average grain size of from about 10 microns to 20 microns. Coarse and fine intragranular gamma prime particles are distributed throughout the grains, of sizes 0.15-0.2 microns and 15 nanometers, respectively. The grain boundaries are substantially free of gamma prime, but have carbides and borides. A method for achieving the desired properties in such turbine disks is also disclosed.Type: GrantFiled: October 4, 1989Date of Patent: January 14, 1992Assignee: General Electric CompanyInventors: Daniel D. Krueger, Jeffrey F. Wessels
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Patent number: 5077004Abstract: A single crystal nickel-base superalloy is disclosed having an improved incipient melting temperature and oxidation resistance. The single crystal nickel-base alloy of this invention is characterized by specific addition of chromium, tungsten, aluminum and tantalum to produce an alloy having moderate high temperature strength and improved oxidation resistance and incipient melting temperature. The nominal composition of our new single crystal alloy (in weight percent) is 10-15% Cr, 0-4% Co, 6-8.5% W, 6-7% Al, 0-1% Ti, 2-6% Ta, and the balance nickel.Type: GrantFiled: May 7, 1986Date of Patent: December 31, 1991Assignee: Allied-Signal Inc.Inventors: Frederick A. Schweizer, Xuan Nguyen-Dinh
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Patent number: 5077141Abstract: Disclosed are novel nickel base single crystal alloy compositions consisting essentially of, by weight, about 4.0-10.0% chromium, 1.5-6.0% cobalt, 1.0-12.0% molybdenum, 3.0-10.0% tungsten, 2.5-7.0% titanium, 2.5-7.0% aluminum, 3.0-10.0% tantalum, about 0.02%-1.5% of hafnium and/or about 0.02%-1.0% silicon, from about 0.02%-1.0% each of yttrium and/or lanthanum, from about 0.3% to about 8.0% rhenium; from about 0.2% to about 4.0% vanadium and/or from about 0.2% to about 4.0% niobium; from about 0.02% to about 3% platinum; from about 0 to about 1.0% boron, the balance nickel, and the balance nickel.Methods of thermal treatment and coating of the novel alloys to enhance their mechanical properties are also disclosed, as are articles produced by such methods.Type: GrantFiled: November 29, 1989Date of Patent: December 31, 1991Assignee: Avco CorporationInventors: Subhash K. Naik, Vinod K. Nangia
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Patent number: 5069873Abstract: A nickel base superalloy for columnar grain, directional solidification which contains Re for strength and creep resistance, and substantially eliminates the use of Zr and minimizes Si to prevent DS grain boundary cracking. The creep- and stress-rupture properties, which approach nickel base superalloy single crystal performance, are achieved without the use of high temperature gamma prime solution treatment.Type: GrantFiled: August 14, 1989Date of Patent: December 3, 1991Assignee: Cannon-Muskegon CorporationInventors: Kenneth Harris, Gary L. Erickson
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Patent number: 5068084Abstract: An article exhibiting superior mechical properties and resistance to oxidation corrosion at elevated temperatures as described. The article has particular utility in gas turbine engines and is comprised of a nickel base superalloy consisting essentially of 3-10% Cr, 12.1-16% Co, 1.0-1.9% Mo, 3-10% W, 0-5% Re, 4-7% Al, 0-1.5% Ti, 0-8% Ta, 0.5-3% Hf, 0-2% Cb, 0-1% V, 0.02-0.12% Zr, 0.03-0.2% C, 0.005-0.25% B, 0-0.15% of an oxygen active element such as yttrium, balance essentially nickel. This composition is melted and directionally solidified in columnar grain form to provide useful articles.Type: GrantFiled: January 2, 1986Date of Patent: November 26, 1991Assignee: United Technologies CorporationInventors: Alan D. Cetel, David N. Duhl
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Patent number: 5063023Abstract: Disclosed is a nickel-base alloy for use under "super oxidizing" environments, for example, concentrated sulfuric acid, fuming nitric acid, chromium acid and mixtures containing chromic acid. The alloy has good strength and may be precipitation hardened. Its thermal stability and weldability are excellent. The alloy has a high degree of resistance to pitting. A nominal composition contains, in percent by weight, about 20 chromium, about 2 copper, about 2 iron, about 2 molybdenum, about 5 silicon and the balance nickel plus normal impurities.Type: GrantFiled: November 17, 1989Date of Patent: November 5, 1991Assignee: Haynes International, Inc.Inventor: Narasi Sridhar
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Patent number: 5055147Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperature. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 8 Cr 13 Mo 4 Al 3.5 Ti 2.5 Ta 5.6 Nb 1.9 Zr 0.06 C 0.05 B 0.Type: GrantFiled: December 29, 1988Date of Patent: October 8, 1991Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5037495Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight 5 ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 5.5 Ti 2.25 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: June 30, 1989Date of Patent: August 6, 1991Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5035958Abstract: There is provided by the present invention an alloy which is mechanically and chemically compatible with advanced nickel-base superalloys and nickel-base eutectic superalloys and which possesses excellent resistance to high temperature oxidation. The alloy of the invention is, therefore, particularly useful as a protective environmental coating for the external surfaces of hot-stage aircraft gas turbine engine components, e.g., rotating blades and stationary vanes, made from such advanced superalloys.Type: GrantFiled: October 11, 1989Date of Patent: July 30, 1991Assignee: General Electric CompanyInventors: Melvin R. Jackson, Mark L. Prugar, Swe-Wong Yang, John R. Rairden, III, Michael F. X. Gigliotti, Jr.
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Patent number: 5023050Abstract: A nickel-based superalloy is provided which is resistant to deterioration in hydrogen at high operating temperatures and pressures, and which thus can be used in hydrogen-fueled spacecraft such as the Space Shuttle. The superalloy is characterized by a two-phase microstructure and consists of a gamma-prime precipitated phase in a gamma matrix. The gamma matrix phase is a primary solid solution and the gamma precipitated phase will be an intermetallic compound of the type A.sub.3 B, such as nickel aluminide or titanide. Both phases are coherent, ordered, and compatible, and thus will retain most of their strength at elevated temperatures. The alloy consists essentially of (by weight):______________________________________ Ni 50-60% Cr 10-20% Al 2-6% Co 2-5% Ti 3-8% W 5-12% Mo 5-10% Nb 1-3% ______________________________________wherein the ratio W/MO is approximately equal to 1, and Ti/Al ranges from about 1 to about 2.Type: GrantFiled: October 24, 1989Date of Patent: June 11, 1991Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Eugene C. McKannan, William B. McPherson, Shaffiq Ahmed, Shirley S. Chandler
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Patent number: 5006163Abstract: A novel, nickel-base, high temperature alloy body preferably containing about 20% chromium, 6 to 7% aluminum to provide phase, 1.5 to 2.5% molybdenum, 3 to 4.5% tungsten, additional strengthening elements and oxidic yttrium in finely dispersed form. The alloy body has an elongated crystal structure and is characterized by high strength along with excellent hot corrosion and oxidation resistance.Type: GrantFiled: May 8, 1989Date of Patent: April 9, 1991Assignee: Inco Alloys International, Inc.Inventors: Raymond C. Benn, Jeffrey M. Davidson, Kenneth R. Andryszak
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Patent number: 5000914Abstract: A precipitation-hardening-type Ni-base alloy exhibiting improved resistance to stress corrosion cracking in a sour gas atmosphere containing elemental sulfur at high temperatures is disclosed. The alloy comprises essentially, by weight %;______________________________________ Cr: 12-25%, Mo: 5.5-15%, Nb: 4.0-6.0%, Fe: 5.0-25%, Ni: 45-60%, C: 0.050% or less, Si: 0.50% or less, Mn: 1.0% or less, P: 0.025% or less, S: 0.0050% or less, N: 0.050% or less, Ti: 0-1.0%, Al: 0-2.0%.Type: GrantFiled: November 23, 1987Date of Patent: March 19, 1991Assignee: Sumitomo Metal Industries, Ltd.Inventors: Masaaki Igarashi, Shiro Mukai, Yasutaka Okada, Akio Ikeda
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Patent number: 4983233Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperature. The composition of the alloy is essentially as follows:______________________________________ Concentration in Weight % Claimed Composition Ingredient From To ______________________________________ Ni balance Co 4 12 Cr 7 13 Mo 2 6 Al 3.0 6.0 Ti 3.5 5.0 Ta 2.0 4.0 Nb 1.0 3.0 Re 0.0 3.0 Hf 0.0 0.75 Zr 0.0 0.10 V 0.0 3.0 C 0.0 0.20 B 0.0 0.10 W 0.0 1.0 Y 0.0 0.Type: GrantFiled: January 3, 1989Date of Patent: January 8, 1991Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 4981644Abstract: Alloy compositions for nickel-base superalloys having the qualities of weldability, castability and forge-ability together with improved high temperature strength and rupture properties are disclosed. The weldability is improved by varying the Al, Ti, Nb and Ta content so as to insure that only the favorable .gamma." precipitates are formed in the alloy. The high temperature properties of the alloy compositions are optimized by controlling the content of the major alloying elements Co and Cr. Preferably the alloy is substantially free of Fe.Type: GrantFiled: September 9, 1988Date of Patent: January 1, 1991Assignee: General Electric CompanyInventor: Keh-Minn Chang
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Patent number: 4957703Abstract: A precipitation-hardenable nickel-base superalloy with improved mechanical properties in the temperature range from 600.degree. to 750.degree. C. which has the following composition:Cr=12-15 percent by weightCo=3-4.5 percent by weightW=1-3.5 percent by weightTa=4-5.5 percent by weightAl=3-4.3 percent by weightTi=4-5 percent by weightHf=0-2.5 percent by weightB=0-0.02 percent by weightZr=0.01-0.06 percent by weightC=0.05-0.Type: GrantFiled: March 2, 1989Date of Patent: September 18, 1990Assignee: Asea Brown Boveri Ltd.Inventors: Peter Lawrence, Mohamed Nazmy, Markus Staubli
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Patent number: 4935072Abstract: Nickel base superalloy single crystal articles, preferably aircraft gas turbine blades and vanes, and a process for preparation thereof, wherein phase stability after extended elevated temperature exposure is enhanced by controlling the content of heavy refractory elements and gamma prime phase forming elements. The nominal alloy composition range in weight percent is 4-6 percent chromium, 8-12 percent cobalt, 1-2.5 percent molybdenum, 3-6 percent tungsten, 1.8-3.2 percent rhenium, 0-2.5 percent ruthenium, 5-6 percent aluminum, 0.5-1.5 percent titanium, 7-10 percent tantalum, 0.08-0.12 percent hafnium, balance nickel. The sum of the heavy refractory elements molybdenum plus tungsten plus rhenium is 8.4-10.4 percent, and the sum of the gamma prime forming elements aluminum plus titanium plus tantalum is 13.8-15.7 percent.Type: GrantFiled: April 7, 1988Date of Patent: June 19, 1990Assignee: Allied-Signal, Inc.Inventor: Xuan Nguyen-Dinh
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Patent number: 4915907Abstract: The anisotropy typically observed in single crystal nickel base superalloys is reduced by intentionally adding certain small amounts of carbon, boron, zirconium or hafnium, either individually or in combination, to the alloy composition.Type: GrantFiled: January 19, 1988Date of Patent: April 10, 1990Assignee: United Technologies CorporationInventors: Dilip M. Shah, David N. Duhl
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Patent number: 4908183Abstract: Nickel base superalloys having properties equal to or better than alloys currently used in gas turbine engines are described. Preferably, the alloys of the present invention are cast into single crystals.Type: GrantFiled: March 9, 1988Date of Patent: March 13, 1990Assignee: United Technologies CorporationInventors: Stephen Chin, David N. Duhl
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Patent number: 4900511Abstract: A low density superalloy having good resistance to oxidation has the following composition by weight:Co: 5.0 to 6.0%W: 4.8 to 5.2%Cr: 7.8 to 8.3%Al: 5.8 to 6.1%Ta: 3.3 to 3.7%Mo: 2.1 to 2.4%Ti: 1.8 to 2.2%B: .ltoreq.10 ppmZr: .ltoreq.50 ppmNi: balance to 100%.Type: GrantFiled: December 6, 1988Date of Patent: February 13, 1990Assignee: Office National d'Etudes et de Recherche AerospatialesInventors: Tasadduq Khan, Pierre Caron, Jean-Louis Raffestin
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Patent number: 4894089Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 4 Ti 3.55 Ta 7.0 Nb 1.10 Zr 0.06 V 1 C 0.05 B 0.Type: GrantFiled: October 2, 1987Date of Patent: January 16, 1990Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 4871512Abstract: An alloy for use in an exhaust valve of an automotive vehicle is disclosed, which consists of C: 0.01-0.15%, Si.ltoreq.2.0%, Mn.ltoreq.0.5%; Cr: 15-25%, Mo: 0.4-3.1% and W: 0.2-3.8% so that (Mo+1/2W) is 0.5 to 5.0%, Nb+Ta: 0.3-3.0%, Ti: 1.5-3.5%, Al: 0.5-2.5%, B: 0.001-0.02%, Fe.ltoreq.5% and the balance of Ni or Ni+Co.Type: GrantFiled: October 2, 1986Date of Patent: October 3, 1989Assignees: Daido Tokushuko K.K., Honda Giken Kogyo K.K.Inventors: Yoshiaki Takagi, Susumu Isobe, Kenkichi Matsunaga
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Patent number: 4853044Abstract: An alloy suitable for making single crystal castings consists essentially of the following constituents by weight percent:______________________________________ Chromium 8-15% Aluminum 5-7% Titanium 2-5% Niobium 0.1-2% Molybdenum 0-7% Tantalum 1-8% Tungsten 0-7% Cobalt 5-15% Vanadium 0.5-2% Carbon 0-0.05% Balance Nickel plus impurities. ______________________________________The combined weight of Tungsten, Molybdenum and Tantalum is from 2.5 to 8.0 percent by weight of the total alloy weight and the combinations of Aluminium, Titanium, Niobium, Tantalum and Vanadium are balanced such as to give an alloy volume fraction of between 60 and 75% of gamma prime (Ni.sub.3 (M)) where M is Aluminium, Titanium, Niobium, Tantalum, Vanadium and also minimum gamma/gamma prime lattice mismatch. The alloy has good high strength characteristics, impact resistance, corrosion and oxidation resistance and has a wide heat treatment window.Type: GrantFiled: January 13, 1988Date of Patent: August 1, 1989Assignee: Rolls-Royce plcInventors: David A. Ford, Anthony D. Hill, Ian R. Pashby
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Patent number: 4844864Abstract: A precipitation hardenable, nickel-base alloy having improved intergranular stress corrosion cracking resistance in water environments at temperatures up to about 700.degree. F. is disclosed containing in weight percent about:______________________________________ w/o ______________________________________ Carbon up to 0.25 Manganese up to 1.0 Silicon up to 0.80 Phosphorus up to 0.025 Sulfur up to 0.010 Chromium 10-25 Molybdenum up to 1 Aluminum 0.2-1.5 Titanium 1.5-3 Niobium 0.10-3 Iron 0.1-20 Boron 0.0005-0.004 Copper up to 2.0 Cobalt up to 25 Zirconium up to 0.07 ______________________________________the balance being essentially nickel. The unique properties of the alloy are provided within the stated ranges when: (a) at least about 0.30% molybdenum is present when the allow contains more than about 0.003% boron and more than about 0.001% zirconium; (b) no more than about 0.002% boron is present when the alloy contains more than about 0.05% zirconium; and (c) not more than about 0.Type: GrantFiled: April 27, 1988Date of Patent: July 4, 1989Assignee: Carpenter Technology CorporationInventor: Richard B. Frank
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Patent number: 4810466Abstract: An Ni--Cr--W--Al--Ti--Ta alloy exhibiting an improved high creep rupture strength and a corrosion resistance contains by weight, 12 to 20% of Cr, 18 to 25% of W, 1 to 3% of Al, 0.2 to 1.5% of Ti, 0.2 to 1.5% of Ta, 0.02 to 0.3% of C, less than 0.1% of B, less than 0.2% of Zr and the balance being substantially Ni.Type: GrantFiled: October 23, 1987Date of Patent: March 7, 1989Assignee: Korea Advanced Institute of Science and TechnologyInventors: Ju Choi, Chong K. Lee
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Patent number: 4810467Abstract: A high temperature-resistant nickel-base alloy adapted for use in turbine nozzle components contains carefully balanced amounts of aluminum and titanium to render the alloy repair weldable. The levels of carbon and zirconium are also carefully controlled to improve the castability of the alloy so that large turbine components may be cast without hot tearing or microshrinkage.Type: GrantFiled: August 6, 1987Date of Patent: March 7, 1989Assignee: General Electric CompanyInventors: John H. Wood, John S. Haydon
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Patent number: 4788036Abstract: Nickel-base alloys containing special and correlated percentages of chromium, iron, molybdenum, titanium, columbium, aluminum etc. (i) provide an attractive combination of strength, ductility, resistance to environmental media and other desirable characteristics, (ii) can be processed by cold working and age hardening to achieve yield strengths of 150,000 psi (1034 MPa) to 200,000 psi (1379 MPa) together with tensile elongations of 10% to 20%, (iii) are resistant to such corrosive media as hydrogen sulphide and acid chloride solutions, and to hydrogen embittlement, and (iv) are useful for, inter alia, petroleum production tubing and sulfur dioxide gas scrubber applications.Type: GrantFiled: October 1, 1986Date of Patent: November 29, 1988Assignee: INCO Alloys International, Inc.Inventors: Herbert L. Eiselstein, Jerry A. Harris, Darrell F. Smith, Jr., Edward F. Clatworthy, Stephen Floreen, Jeffrey M. Davidson
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Patent number: 4784830Abstract: An oxidation resistant nickel-chromium based alloy possessing good stress rupture characteristics at elevated temperature and, in addition to nickel and chromium, containing correlated percentages of aluminum, titanium, nitrogen, carbon, etc.Type: GrantFiled: June 8, 1987Date of Patent: November 15, 1988Assignee: Inco Alloys International, Inc.Inventors: Pasupathy Ganesan, Gaylord D. Smith, Curtis S. Tassen, Jack M. Wheeler
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Patent number: 4777017Abstract: A low density nickel based superalloy having good creep characteristics w hot, and intended in particular for making turbomachine parts by monocrystalline solidification, wherein the composition of the alloy in percentages by weight is as follows:______________________________________ Co: 5% to 7% Cr: 5% to 10% Mo: 0.5% to 2.5% W: 3% to 5% Al: 6% to 7.5% Ti: 1.5% to 2.25% Nb: 0% to 0.5% Ta: 2% to 4% V: 0.3% to 0.6% Ni: balance to 100%. ______________________________________Parts, e.g. turbomachine blades, made from the alloy.Type: GrantFiled: June 20, 1986Date of Patent: October 11, 1988Assignee: Office National D'Etudes et de Recherches Aerospatiales (ONERA)Inventors: Tasadduq Khan, Pierre Caron, Jean-Louis Raffestin
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Patent number: 4767597Abstract: A heat-resistant alloy having excellent properties at high temperatures and useful for producing exhaust valves, comprises, in weight %, not more than 0.10% C, not more than 2.0% Si, not more than 2.0% Mn, from 35 to 50% Ni, from 17 to 25% Cr, from 3.2 to 5% Mo, from 2.0 to 3.2% Ti, from 0.5 to 1.5% Al, with the balance consisting essentially of Fe, wherein the weight ratio of Ti/Al is not more than 5/1. The alloy may further comprise at least one of B, Ca, and Mg, and/or at least one of Nb and Ta.Type: GrantFiled: May 2, 1985Date of Patent: August 30, 1988Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Kazuaki Nishino, Takuo Ito, Satosi Kato, Hidenori Yamaoka