Chromium Containing Patents (Class 420/545)
  • Patent number: 11986904
    Abstract: Disclosed herein are embodiments of an Al—Ce—Ni alloy for use in additive manufacturing. The disclosed alloy embodiments provide fabricated objects, such as bulk components, comprising a heterogeneous microstructure and having good mechanical properties even when exposed to conditions used during the additive manufacturing process. Methods for making and using alloy embodiments also are disclosed herein.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: May 21, 2024
    Assignees: UT-Battelle, LLC, University of Tennessee Research Foundation, Iowa State University Research Foundation, Inc.
    Inventors: Ryan R. Dehoff, Hunter B. Henderson, Scott McCall, Richard Michi, Peeyush Nandwana, Ryan Ott, Alexander J. Plotkowski, Orlando Rios, Amit Shyam, Zachary C. Sims, Kevin D. Sisco, David Weiss, Ying Yang
  • Publication number: 20130199680
    Abstract: Aluminum die casting alloy comprising 2 to 6% by weight nickel, 0.1 to 0.4% by weight zirconium, 0.1 to 0.4% by weight vanadium, optionally up to 5% by weight manganese, optionally up to 2% by weight iron, optionally up to 1% by weight titanium, optionally total max. 5% by weight transition elements including scandium, lanthanum, yttrium, hafnium, niobium, tantalum, chromium and/or molybdenum, and aluminum as the remainder with further elements and impurities due to production total max. 1% by weight.
    Type: Application
    Filed: April 6, 2011
    Publication date: August 8, 2013
    Applicant: RHEINFELDEN ALLOYS GMBH & CO. KG
    Inventors: Diran Apelian, Makhlouf M. Makhlouf
  • Publication number: 20130022301
    Abstract: With regard to an Al—Cr—Zr based alloy having annealing temper, a high temperature strength at 180 to 200 degrees C. is ensured. An aluminum alloy for a plain bearing having improved fatigue resistance is to be provided. An aluminum alloy for a plain bearing solving the problems has a composition of 3 to 7 mass % Mg, 0.1 to 0.3 mass % Cr, and 0.1 to 0.3 mass % Zr, with the balance being Al and inevitable impurities. A principal structure of the aluminum alloy consist of an Al matrix containing solute Mg, minute particles of Cr, and Zr.
    Type: Application
    Filed: December 22, 2010
    Publication date: January 24, 2013
    Applicant: TAIHO KOGYO CO., LTD.
    Inventors: Takashi Tomikawa, Shinichiro Sakamoto, Katsumi Yamamoto
  • Patent number: 8337644
    Abstract: An aluminum alloy, comprising magnesium 4.5 to 6.5% by weight, silicon 1.0 to 3.0% by weight, manganese 0.3 to 1.0% by weight, chromium 0.02 to 0.3% by weight, titanium 0.02 to 0.2 % by weight, zirconium 0.02 to 0.2% by weight, one or more rare earth metals 0.0050 to 1.6% by weight, iron max. 0.2% by weight, and the remainder aluminum.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: December 25, 2012
    Assignee: Aluminium Lend Gesellschaft m.b.H.
    Inventors: Günther Trenda, Andreas Kraly
  • Publication number: 20120103476
    Abstract: Improved 5xxx aluminum alloys having an improved combination of properties are disclosed. The new 5xxx aluminum alloys generally contain 0.50 to 3.25 wt. % Mg, 0.05 to 0.20 wt. % Sc, 0.05 to 0.20 wt. % Zr, up to 0.50 wt. % in total of Cu and Ag, less than 0.10 wt. % Mn, up to 0.30 wt. % in total of Cr, V and Ti, up to 0.50 wt. % in total of Ni and Co, up to 0.25 wt. % Fe, up to 0.25 wt. % Si, up to 0.50 wt. % Zn, and up to 0.10 wt. % of any other element, with the total of these other elements not exceeding 0.35 wt. %, the balance being aluminum. The new 5xxx aluminum alloys may be used in high strength electrical conductor products, among others.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: Alcoa Inc.
    Inventors: John M. Newman, Francine S. Bovard, Ralph R. Sawtell
  • Patent number: 8021500
    Abstract: Provided are an aluminum alloy for die casting that has excellent die-castability, a molding with high hardness, and a molded article with excellent sheen. The aluminum alloy for die casting includes 0.5 to 2.5 wt. % Mn, 0.2 to 1.0 wt. % Cr, 0.1 to 0.5 wt. % Ti, 0.1 to less than 0.5 wt. % Mg, and Al. The molding is obtained by die-casting the aluminum alloy for die casting. The molding obtained by die-casting the aluminum alloy has excellent die-castability and high hardness. By performing the alumite treatment on the surface of the molding, a molded article having excellent sheen is obtained.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: September 20, 2011
    Assignee: Tanaka Sangyo Co., Ltd.
    Inventors: Kenji Tanaka, Takao Asami, Kiyoto Takeuchi, Yutaka Fujiwara, Koukiti Takahashi, Tadanori Manome
  • Patent number: 7998402
    Abstract: An aluminium alloy product having high strength, excellent corrosion resistance and weldability, having the following composition in wt. %: Mg 3.5 to 6.0, Mn 0.4 to 1.2, Fe<0.5, Si<0.5, Cu<0.15, Zr<0.5, Cr<0.3, Ti 0.03 to 0.2, Sc<0.5, Zn<1.7, Li<0.5, Ag<0.4, optionally one or more of the following dispersoid forming elements selected from the group consisting of erbium, yttrium, hafnium, vanadium, each <0.5 wt. %, and impurities or incidental elements each <0.05, total <0.15, and the balance being aluminium.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: August 16, 2011
    Assignee: Aleris Aluminum Koblenz, GmbH
    Inventors: Nadia Telioui, Steven Dirk Meijers, Andrew Norman, Achim Buerger, Sabine Maria Spangel
  • Publication number: 20100054986
    Abstract: Provided are an aluminum alloy for die casting that has excellent die-castability, a molding with high hardness, and a molded article with excellent sheen. The aluminum alloy for die casting includes 0.5 to 2.5 wt. % Mn, 0.2 to 1.0 wt. % Cr, 0.1 to 0.5 wt. % Ti, 0.1 to less than 0.5 wt. % Mg, and Al. The molding is obtained by die-casting the aluminum alloy for die casting. The molding obtained by die-casting the aluminum alloy has excellent die-castability and high hardness. By performing the alumite treatment on the surface of the molding, a molded article having excellent sheen is obtained.
    Type: Application
    Filed: March 23, 2007
    Publication date: March 4, 2010
    Applicant: TANAKA SANGYO CO., LTD.
    Inventors: Kenji Tanaka, Takao Asami, Kiyoto Takeuchi, Yutaka Fujiwara, Koukiti Takahashi, Tadanori Manome
  • Publication number: 20080219882
    Abstract: The invention relates to a method for producing a wear-resistant aluminum alloy, to an aluminum alloy produced according to the method, and to the use thereof. The method comprises the steps of: (i) providing an aluminum alloy having the composition Fe: 3-10; X: 3-10; Y: 0-1.5; Z: 0-10; wherein X represents an element or combination of elements (a) V and Si; (b) Cr and Ti; (c) Ce; or (d) Mn; each time with the proviso that the proportion of the individual elements in the combinations of elements (a) and (b) is at least 0.
    Type: Application
    Filed: August 11, 2006
    Publication date: September 11, 2008
    Inventor: Mathias Woydt
  • Patent number: 6743396
    Abstract: The present invention relates to a method for producing AlMn strips or sheets for producing components by soldering, wherein a precursor material is produced from a melt which contains (in weight-percent) Si: 0.3-1.2%, Fe: ≦0.5%, Cu: ≦0.1%, Mn: 1.0-1.8%, Mg: ≦0.3%, Cr+Zr: 0.05-0.4%, Zn: ≦0.1% , Ti: ≦0.1% , Sn: ≦0.15%, and unavoidable companion elements, whose individual amounts are at most 0.05% and whose sum is at most 0.15%, as well as aluminum as the remainder, wherein the precursor material is preheated at a preheating temperature of less than 520° C. over a dwell time of at most 12 hours, wherein the preheated precursor material is hot rolled into a hot strip using a final hot rolling temperature of at least 250° C., wherein the hot strip is cold rolled into a cold strip without intermediate annealing.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: June 1, 2004
    Assignee: Hydro Aluminium Deutschland GmbH
    Inventors: Pascal Wagner, Wolf-Dieter Finkelnburg, Dietrich Wieser, Manfred Mrotzek
  • Patent number: 6716390
    Abstract: An aluminum alloy extruded material for automotive structural members, which contains 2.6 to 5 wt % of Si, 0.15 to 0.3 wt % of Mg, 0.3 to 2 wt % of Cu, 0.05 to 1 wt % of Mn, 0.2 to 1.5 wt % of Fe, 0.2 to 2.5 wt % of Zn, 0.005 to 0.1 wt % of Cr, and 0.005 to 0.05 wt % of Ti, and satisfies relationship of the following expression (I), (Content of Mn (wt %))+0.32×(content of Fe (wt %))+0.097×(content of Si (wt %))+3.5×(content of Cr (wt %))+2.9×(content of Ti (wt %))≦1.36 (I) with the balance being made of aluminum and unavoidable impurities. A method of producing the aluminum alloy extruded material for automotive structural members, which comprises cooling with a refrigerant from outside of a die-exit side, at the time of extrusion.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: April 6, 2004
    Assignees: The Furukawa Electric Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoichiro Bekki, Noboru Hayashi
  • Patent number: 6682609
    Abstract: A hydrogen-absorbing alloy which is excellent in stability in an aqueous solution and in mechanical pulverizability is disclosed. This hydrogen-absorbing alloy contains an alloy represented by the following general formula (I): Mg2M1y  (I) wherein M1 is at least one element selected (excluding Mg, elements which are capable of causing an exothermic reaction with hydrogen, Al and B) from elements which are incapable of causing an exothermic reaction with hydrogen; and y is defined as 1<y≦1.5.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: January 27, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Tsuruta, Tatsuoki Kohno, Motoya Kanda
  • Patent number: 6596412
    Abstract: The invention relates to an aluminum alloy, to a plain bearing and to a method of manufacturing a layer, particularly for a plain bearing, to which there is added as a main alloy component tin (14) and a hard material (15) from at least one first element group containing iron, manganese, nickel, chromium, cobalt, copper or platinum, magnesium, or antimony. Added to the aluminum alloy from the first elementary group is a quantity of elements for forming inter-metallic phases, e.g. aluminide formation, in the boundary areas of the matrix, and further at least one further element from a second element group containing manganese, antimony, chromium, tungsten, niobium, vanadium, cobalt, silver, molybdenum of zirconium, for substituting a portion at least of a hard material of the first element group in order to form approximately spherical or cuboid aluminides (7).
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: July 22, 2003
    Assignee: Miba Gleitlager Aktiengesellschaft
    Inventor: Robert Mergen
  • Patent number: 6461566
    Abstract: An aluminum-based alloy having the following composition, % w/w: Lithium 1.5-1.9 Magnesium 4.1-6.0 Zinc 0.1-1.5 Zirconium 0.05-0.3  Manganese 0.01-0.8  Hydrogen 0.9 × 10−5-4.5 × 10−5 and at least one element selected from the following group: Beryllium 0.001-0.2  Yttrium 0.01-0.5 Scandium 0.01-0.3 Aluminum Remainder The process of heat treating the alloy includes the steps of quenching the alloy from a temperature of 400-500° C. in cold water or air, stretched-adjusting it to increase ductility up to 0 2 %, and a three stage heat treatment, in which in stage 1 the alloy is heated at 80-90° C. over the course of 3-12 h, in stage 2 it is heated at 110-185° C. over the course of 10-58 h, and in stage 3 it is heated at 90-110° C. for 14 h, or at a cooling rate of 2-8° C. C/h.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: October 8, 2002
    Assignees: Eads Deutschland GmbH, Viam (All Russian Institute of Aviation Materials)
    Inventors: Thomas Pfannenmüller, Erwin Loechelt, Peter-Jürgen Winkler, Sergej Mikhajlovich Mozharovskij, Dmitrij Sergejevich Galkin, Elena Glebovna Tolchennikova, Vladimir Mikhajlovich Chertovikov, Valentin Georgijevich Davydov, Evgenij Nikolajevich Kablov, Larisa Bagratovna Khokhlatova, Nikolay Ivanovich Kolobnev, Iosif Naumovich Fridlyander
  • Patent number: 6440581
    Abstract: An improved performance welding bar placed in a welding machine for the welding of thermoplastic material of low and high density, suitable for both the lower welding bar (11) and the upper welding bar (12) among which bars (11, 12) the material is moved along by at least one pair of lower (14) and upper (15) supply rollers, placed on top of each other, the two welding bars (11, 12) moved backwards and forwards between themselves by a control group (20), wherein each welding bar (11, 12) is made from a magnesium-zinc aluminum alloy, within which the percentage of zinc to be found is between 5.0-6.5% and the percentage of magnesium to be found is between 2.0-3.0%. According to the invention the use of a magnesium zinc aluminum alloy is provided for, for a welding bar in a welding machine of thermoplastic material, wherein the bar is continually activated by a forward and/or backward movement with regards to a second similar welding bar.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: August 27, 2002
    Assignee: Elba S.p.A.
    Inventor: Francesco Dragoni
  • Patent number: 6416884
    Abstract: The disclosure relates to an aluminium-base weld filler alloy having the following composition in weight percent: Mg 5.0-6.5, Mn 0.4-1.2, Zn 0.4-<2.0, Zr 0.05-0.3, Cr 0.3 max., Ti 0.2 max., Fe 0.5 max., Si 0.5 max., Cu 0.25 max., balance Al and inevitable impurities. Further, the disclosure relates to a method of manufacturing an aluminium-base weld wire, and to a method of constructing welded constructions.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: July 9, 2002
    Assignee: Corus Aluminium Walzprodukte GmbH
    Inventors: Alfred Johann Peter Haszler, Desikan Sampath
  • Publication number: 20020015658
    Abstract: An aluminum-copper-zinc alloy having ancillary additions of lithium. The alloy composition includes from about 5 to 13 wt % zinc and from about 0.01 to 1.0 wt % lithium.
    Type: Application
    Filed: June 3, 1999
    Publication date: February 7, 2002
    Inventors: ROBERTO J. RIOJA, GARY H. BRAY, JAMES T. STALEY, DIANA K. DENZER
  • Patent number: 6342112
    Abstract: An Al—Mg based alloy sheet product in which the crystallographic texture exhibits a ratio of the volume fraction of grains in the S orientation {123}<634> to the volume fraction of grains in the CUBE orientation {100}<001> (S/Cube) being 1 or more, and is comprised of grains with a volume fraction of about 10% or less in the GOSS orientation {110}<001>, wherein the grain size is in a range of about 20 to 100 &mgr;m demonstrates good formability.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: January 29, 2002
    Assignees: Alcoa Inc., Kobe Steel Ltd.
    Inventors: Frederic Barlat, John C. Brem, Shigeo Hattori, Yasuhiro Havashida, Daniel J. Lege, Kwansoo Chung, Yasushi Maeda, Kuniaki Matsui, Shawn J. Murtha, Masahiro Yanagawa, Narikazu Hashimoto
  • Patent number: 6338817
    Abstract: An aluminum extruded door beam includes an outer flange, an inner flange, and at least one web for connecting the outer flange and the inner flange. The outer corners at the extended ends of the outer flange have a radius R of 2.5 mm or less. The outward corners at the connections between the web and the inner flange and between the web and the outer flange have a radius R of 2 mm to 4 mm. The radius of the outward corners at the connections between the web and the inner flange and between the web and the outer flange is 1.5 to 2 times the width of the web. The length of the extended ends of the outer flange is 1 to 2 times the radius R of the outward corner at the connections between the web and the outer and inner flanges. The aluminum alloy extruded door beam material contains 0.8 to 1.5% by weight (hereinafter the same) of Mg and 4 to 7% of Zn, and the recrystallization surface layer has a thickness of 50 &mgr;m or less.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: January 15, 2002
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Hiroyuki Yamashita, Masakazu Hirano
  • Patent number: 6306342
    Abstract: An aluminum casting alloy contains 0.5 to 2.0 w. % magnesium max. 0.15 w. % silicon 0.5 to 2.0 w. % manganese max. 0.7 w. % iron max. 0.1 w. % copper max. 0.1 w. % zinc max. 0.2 w. % titanium 0.1 to 0.6 w. % cobalt max. 0.8 w. % cerium 0.5 to 0.5 w. % zirconium max. 1.1 w. % chromium max. 1.1 w. % nickel 0.005 to 0.15 w. % vanadium max. 0.5 w. % hafnium and aluminum as the remainder with further contaminants individually at 0.05 w. %, total max. 0.02 w. %. The aluminum casting alloy is particularly suitable for diecasting and thixocasting or thixoforging. One particular application is diecasting for components with high requirements for mechanical properties as these are already present in the casting state and thus no further heat treatment is required.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: October 23, 2001
    Assignee: Aluminium Rheinfelden GmbH
    Inventors: Hubert Koch, Horst Schramm, Peter Krug
  • Patent number: 5939164
    Abstract: The present invention relates to an aluminum alloy for a magnetic disk substrate having a composition consisting of, by percent by weight, 2.0 to 6.0% of Mg, 0.05 to 0.15% of Cu, 0.10 to 0.30% of Zn and 0.05 to 0.12% of Zr, wherein the contents of Cu, Zn and Zr satisfy the relationship: 0.15%.ltoreq.2Cu+6Zr-3Zn.ltoreq.0.32% (wherein Cu, Zr, and Zn respectively represent their contents in terms of percent by weight), and the composition further consists of one or both of 0.01 or more to less than 0.05% of Cr and 0.01 or more to less than 0.05% of Mn, impurities consisting of Si, Fe and Ti, which are respectively regulated to be 0.05% or less, 0.05% or less, and 0.02% or less, and other inevitable impurity elements respectively regulated to be 0.02% or less, with the remainder being Al. The present invention also relates to a clad material for a magnetic disk substrate, in which one or both surfaces of a core material, consisting of at least less than 3.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: August 17, 1999
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yoshinari Kubo, Ken-ichi Ogura, Yoichiro Bekki, Satoru Yamada, Koji Kinoshita
  • Patent number: 5676773
    Abstract: Aluminum-based products are disclosed which contain 0.5 to 4.5 wt % lithium and which further contain no more than 1 ppm of each of the alkali metal impurity elements sodium, potassium, rubidium, and cesium. The products are capable of being aged to a peak-aged condition at which they have a grain boundary region substantially free of liquid phase eutectics comprised of sodium and potassium that form embrittlement phases at room temperature, and have a higher fracture toughness than a similar product containing more than 5 ppm in total of the alkali metal impurity elements.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 14, 1997
    Assignee: Comalco Aluminium Limited
    Inventor: Donald Webster
  • Patent number: 5578144
    Abstract: To provide a high-strength, high-ductility cast aluminum alloy, which enables a near-net shape product to be produced by improving the casting structure of an aluminum alloy, particularly by using specific constituents and controlling the cooling rate, and a process for producing the same. The high-strength, high-ductility cast aluminum alloy of the present invention is characterized in that it has a structure comprising fine grains of .alpha.-Al, having an average grain diameter of not more than 10 .mu.m, surrounded by a network of a compound of Al-lanthanide-base metal, the .alpha.-Al grains forming a domain, that the domain comprises an aggregate of .alpha.-Al grains which have been refined, cleaved, and ordered in a single direction and that it has a composition represented by the general formula Al.sub.a Ln.sub.b M.sub.c wherein a, b, and c are, in terms of by weight, respectively 75%.ltoreq.a.ltoreq.95%, 0.5%.ltoreq.b<15%, and 0.5%.ltoreq.c<15%.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: November 26, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuaki Satou, Yukio Okochi
  • Patent number: 5540791
    Abstract: An aluminum-alloy rolled sheet is cold preformed and then superplastically formed by: providing a composition which consists of from 2.0 to 8.0% of Mg, from 0.0001 to 0.01% of Be, and at least one element selected from the group consisting of from 0.3 to 2.5% of Mn, from 0.1 to 0.5% of Cr, from 0.1 to 0.5% of Zr, and from 0.1 to 0.5% of V, less than 0.2% of Fe as impurities, as well as aluminum and unavoidable impurities in balance; providing an unrecrystallized structure formed by annealing at a temperature of from 150.degree. to 240.degree. C. for 0.5 to 12 hours or at a temperature of from 250.degree. to 340.degree. C. for 0 to 5 minutes; providing draft of final cold-rolling amounting to 50% or more; and, providing 7% or more of elongation at normal temperature.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: July 30, 1996
    Assignee: Sky Aluminum Co., Ltd.
    Inventors: Mamoru Matsuo, Tsutomu Tagata
  • Patent number: 5516382
    Abstract: An aluminum alloy useful for drawing and/or ironing, particularly of drink cans. The alloy consists essentially of, in weight percent, Fe<0.25; Si<0.25; Mn from 1.05 to 1.6; Mg from 0.7 to 2.5; Cu from 0.20 to 0.6; Cr from 0 to 0.35; Ti from 0 to 0.1; V from 0 to 0.1; other elements: each <0.05; total<0.15; and remainder Al.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: May 14, 1996
    Assignee: Pechiney Rhenalu
    Inventor: Guy-Michel Raynaud
  • Patent number: 5455003
    Abstract: A method is disclosed for the production of aluminum-copper-lithium alloys that exhibit improved strength and fracture toughness at cryogenic temperatures. Improved cryogenic properties are achieved by controlling the composition of the alloy, along with processing parameters such as the amount of cold-work and artificial aging. The ability to attain substantially equal or greater strength and fracture toughness at cryogenic temperature in comparison to room temperature allows for use of the alloys in cryogenic tanks for space launch vehicles and the like.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: October 3, 1995
    Assignee: Martin Marietta Corporation
    Inventors: Joseph R. Pickens, William T. Tack
  • Patent number: 5453244
    Abstract: There is disclosed a novel aluminum alloy bearing which exhibits a more excellent fatigue resistance than conventional bearings even under such conditions of use as at a high temperature and under a high load. The aluminum alloy bearing has an aluminum bearing alloy layer containing, by weight, 1 to 10% Zn, 0.1 to 5% Cu, 0.05 to 3% Mg, 0.1 to 2% Mn, 0.1 to 5% Pb, 0.1 to 2% V, and 0.03 to 0.5% in total of Ti--B, and further may optionally contain not more than 8% Si, 0.05 to 0.5% Sr, and Ni, Co and Cr. The alloy may be bonded to a steel metal back sheet, and a surface layer may be formed on the surface of the bearing. By use of the composition of the alloy of the invention, the fatigue resistance of the aluminum alloy bearings has been improved, and such an improved bearing can fully achieve a bearing performance even under severe conditions of use as at high temperature and under a high load.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: September 26, 1995
    Assignee: Daido Metal Company Ltd.
    Inventors: Tadashi Tanaka, Masaaki Sakamoto, Tohru Kato, Yoshiaki Sato
  • Patent number: 5431876
    Abstract: A group of ternary alloys of aluminum-lithium and magnesium or copper further including at least one additive element such as zirconium, chromium and/or manganese. These alloys have an improved combination of properties such as strength, ductility and weldability and in some cases improved tensile properties at cryogenic temperatures.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: July 11, 1995
    Assignee: Comalco Aluminium Ltd.
    Inventors: K. Sharvan Kumar, Joseph R. Pickens
  • Patent number: 5422066
    Abstract: Aluminum-base alloys in a peak-aged condition and magnesium-base alloys in the form of cast products and wrought products capable of having improved combinations of yield strength and fracture toughness are disclosed. The aluminum-base alloy products are comprised of 0.5 to 4.5 wt %. lithium, about 0.01 to 1 ppm Na, about 0.01 to 1 ppm K, less than 0.1 ppm Rb, less than 0.1 ppm Cs, and the remainder comprising aluminum. Aluminum-base alloy products in a peak-aged condition have: (i) a grain boundary region substantially free of liquid phase eutectics comprised of Na and K that form embrittlement phases at room temperature; and (ii) an increase in fracture toughness compared to an aluminum-lithium alloy having greater than 5 ppm aggregate alkali metal.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: June 6, 1995
    Assignee: Comalco Aluminium Limited
    Inventor: Donald Webster
  • Patent number: 5380376
    Abstract: An improved aluminum alloy armoured cable wrap has been produced which permits the use of less aluminum alloy in the cable wrap thereby achieving lighter construction, while meeting or exceeding strength and flexibility requirements. The armoured cable wrap is made from aluminum alloy strip material formed of an aluminum alloy containing about 2.8-3.5 percent by weight Mg, about 0.25-0.70 percent by weight Mn and about 0.15-0.35 percent by weight Cr. Up to 0.5 percent by weight of Cu may also be added. The strip material is heat treated preferably to an Ultimate Tensile Strength of at least 265 MPa.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: January 10, 1995
    Assignee: Alcan International Limited
    Inventors: Paul E. Fortin, Pierre-Henri Marois
  • Patent number: 5354351
    Abstract: An article comprises a Cr-bearing, predominantly gamma titanium aluminide matrix including second phase dispersoids, such as TiB.sub.2, in an amount effective to increase both the strength and the ductility of the matrix.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: October 11, 1994
    Assignees: Howmet Corporation, Martin Marietta Corporation
    Inventors: Stephen L. Kampe, Leontios Christodoulou, Donald E. Larsen, Jr.
  • Patent number: 5211910
    Abstract: Aluminum-base alloys containing Cu, Li, Zn, Mg and Ag are disclosed which possess highly desirable properties, such as relatively low density, high modulus, high strength/ductility combinations, strong natural aging response with and without prior cold work, and high artificially aged strength with and without prior cold work. In addition, the alloys possess good weldability, corrosion resistance, cryogenic properties, and elevated temperature properties. The alloys may comprise from about 1 to about 7 weight percent Cu, from about 0.1 to about 4 weight percent Li, from about 0.01 to about 4 weight percent Zn, from about 0.05 to about 3 weight percent Mg, from about 0.01 to about 2 weight percent Ag, from about 0.01 to about 2 weight percent grain refiner selected from Zr, Cr, Mn, Ti, Hf, V, Nb, B and TiB.sub.2, and the balance Al along with incidental impurities. Preferred alloys comprise from about 3.0-6.5 weight percent Cu, from about 0.5-2.6 weight percent Li, from about 0.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: May 18, 1993
    Assignee: Martin Marietta Corporation
    Inventors: Joseph R. Pickens, Timothy J. Langan, Frank H. Heubaum, Lawrence S. Kramer, Alex Cho
  • Patent number: 5181969
    Abstract: Provided is a superplastic forming aluminum alloy in rolled form which exhibits superplasticity and has improved corrosion resistance, weldability, and strength and fatigue property after superplastic forming, eliminating a need for heat treatment after superplastic forming. Preferred alloys have an excellent outer appearance of grey to black color after anodization. The alloy consists essentially of, in % by weight, 2.0-8.0% of Mg, 0.3-1.5% of Mn, 0.0001-0.01% of Be, an optional element selected from C, V, and Zr, an optional grain refining agent of Ti or Ti and B, less than 0.2% of Fe and less than 0.1% of Si as impurities, and the balance of Al, wherein intermetallic compounds have a size of up to 20 .mu.m, and the content of hydrogen present is up to 0.35 cc/100 grams. Particularly when a minor amount of Ti or Ti and B grain refining agent is contained, Mn precipitates have a size of 0.05 .mu.m or larger, and the Si content in entire precipitates is less than 0.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: January 26, 1993
    Assignee: Sky Aluminum Co., Ltd.
    Inventors: Toshio Komatsubara, Tsutomu Tagata, Mamoru Matsuo
  • Patent number: 5032359
    Abstract: A family of alloys based upon aluminum-copper-magnesium-silver alloys to which lithium has been added, within specified ranges, exhibits superior ambient- and elevated-temperature strength, superior ductility at ambient and elevated temperatures, extrudability, forgeability, weldability, and an unexpected natural aging response.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: July 16, 1991
    Assignee: Martin Marietta Corporation
    Inventors: Joseph R. Pickens, Frank H. Heubaum, Lawrence S. Kramer, K. Sharvan Kumar
  • Patent number: 4929421
    Abstract: A new family of medium and high strength, thermally stable aluminum based alloys are described having the following composition: 0.4 to 1.2% by weight chromium, 0.3 to 0.8% by weight zirconium, 1.5 to 2.5% by weight manganese, 0 to 2.0% by weight magnesium and the balance essentially aluminum. These alloys can be produced on a twin-roll caster preferably at a thickness of no more than 4 mm and a casting temperature of at least 820.degree. C.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: May 29, 1990
    Assignee: Alcan International Limited
    Inventors: Iljoon Jin, David J. Lloyd
  • Patent number: 4851192
    Abstract: An aluminum alloy for structures with increased electrical resistivity, consisting essentially of: 1.0-5.0% by weight of Li; one or a plurality of members selected from the group consisting of not more than 0.20% by weight of Ti, 0.05-0.40% by weight of Cr, 0.05-0.30% by weight of Zr, 0.05-0.35% by weight of V and 0.05-0.30% by weight of W; and the balance being aluminum, and impurities which would inevitably be included in the alloy. The aluminum alloy may further include (a) not more than 5.0% by weight of Mn, and/or (b) 0.05-5.0% by weight of Cu and/or 0.05-8.0% by weight of Mg.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: July 25, 1989
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Yoshio Baba, Teruo Uno, Hideo Yoshida
  • Patent number: 4620961
    Abstract: A high electrical resistance, superior formability aluminum alloy useful as structural materials used in structures suffering the action of high magnetic field, nuclear fusion reactor or the like, said aluminum alloy consisting essentially of, by weight, 1.0 to 8.0% of Mg, 0.05 to less than 1.0% of Li, at least one element selected from the group consisting of 0.05 to 0.20% of Ti, 0.05 to 0.40% of Cr, 0.05 to 0.30% of Zr, 0.05 to 0.35% of V, 0.05 to 0.30% of W and 0.05 to 2.0% of Mn, and the balance being aluminum and incidental impurities. Further, Bi in the range of 0.05 to 0.50 wt. % may be contained in said alloy.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: November 4, 1986
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Yoshio Baba, Teruo Uno, Hideo Yoshida, Yoshifusa Shoji
  • Patent number: 4469537
    Abstract: Aluminum-magnesium-manganese alloy cold rolled to produce armor plate with improved ballistic properties.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: September 4, 1984
    Assignee: Reynolds Metals Company
    Inventors: Richard F. Ashton, David S. Thompson
  • Patent number: 4375500
    Abstract: An aluminum-tin (Al-Sn) base bearing alloy and a bearing material which is made by applying the Al-Sn base bearing alloy to a backing steel sheet by pressure welding. The Al-Sn base bearing alloy of the invention is characterized in that the coarsening of tin particles and the lowering of the hardness under high temperature conditions are quite small so that the wear resistance as well as the fatigue strength of the alloy are quite excellent. The Al-Sn base bearing alloy comprises 3.0-35 wt. % of Sn; at least 0.1 wt. % of Cr; at least 1.0 wt. % of Zr, with the proviso that the total amount of Cr and Zr is not more than 10 wt. %; and the remainder of aluminum. The Al-Sn base bearing alloy of the invention can further contain 3 wt. % or less in total of Cu and/or Mg and 9 wt. % or less in total of one or more members of Pb, Bi, In, Tl and Cd, thereby improving the bearing characteristics.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: March 1, 1983
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Tamotsu Nara, Soji Kamiya