Magnesium Containing Patents (Class 148/417)
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Publication number: 20080173377Abstract: An AA7000-series alloy including 3 to 10% Zn, 1 to 3% Mg, at most 2.5% Cu, Fe <0.25%, and Si >0.12 to 0.35%, and a method of manufacturing these aluminum alloy products. More particularly, disclosed are aluminum wrought products in relatively thick gauges, in particular i.e. about 30 to 300 mm thick. While typically practiced on rolled plate product forms, this method may also find use with manufacturing extrusions or forged product shapes. Representative structural component parts made from the alloy product include integral spar members, and the like, which are machined from thick wrought sections, including rolled plate.Type: ApplicationFiled: July 5, 2007Publication date: July 24, 2008Applicant: Aleris Aluminum Koblenz GmBHInventors: Sunil Khosla, Andrew Norman, Hugo Van Schoonevelt
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Publication number: 20080066833Abstract: The present invention provides an Al—Zn—Mg—Cu casting alloy that provides high strength for automotive and aerospace applications and optimized stress corrosion cracking resistance in highly corrosive and tensile environments. The inventive alloy composition includes about 3.5 wt. % to about 5.5 wt. % Zn; about 1.0 wt. % to about 3.0 wt. % Mg; about 0.5 wt. % to about 1.2 wt. % Cu; less than about 1.0 wt. % Si; less than about 0.30 wt. % Mn; less than about 0.30 wt. % Fe; and a balance of Al and incidental impurities.Type: ApplicationFiled: September 17, 2007Publication date: March 20, 2008Inventors: Jen C. Lin, Xinyan Yan, Wenping Zhang, James P. Moran, John M. Newman, Ralph R. Sawtell, Gerald D. Scott, Michael Brandt, Bob R. Fors, Rick A. Borns, Moustapha Mbaye
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Publication number: 20080060723Abstract: A castable aluminum alloy includes, in weight %, about 0.4% to about 2.5% Si, up to about 5% Cu, up to about 1% Mg, up to about 1% Fe, up to about 2% Mn, up to about 0.3% Ti, up to about 2.5% Ni, up to about 3% Zn, and the balance aluminum and provides reduced casting porosity and improved tensile strength and ductility in the cast and the heat treated condition.Type: ApplicationFiled: September 11, 2006Publication date: March 13, 2008Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: Herbert W. Doty
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Publication number: 20080029187Abstract: The invention provides a 2000 series aluminum alloy having enhanced damage tolerance, the alloy consisting essentially of about 3.0-4.0 wt % copper; about 0.4-1.1 wt % magnesium; up to about 0.8 wt % silver; up to about 1.0 wt % Zn; up to about 0.25 wt % Zr; up to about 0.9 wt % Mn; up to about 0.5 wt % Fe; and up to about 0.5 wt % Si, the balance substantially aluminum, incidental impurities and elements, said copper and magnesium present in a ratio of about 3.6-5 parts copper to about 1 part magnesium. The alloy is suitable for use in wrought or cast products including those used in aerospace applications, particularly sheet or plate structural members, extrusions and forgings, and provides an improved combination of strength and damage tolerance.Type: ApplicationFiled: September 7, 2005Publication date: February 7, 2008Inventors: Jen C. Lin, John M. Newman, Paul E. Magnusen, Gary H. Bray
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Patent number: 7323068Abstract: Disclosed is a high damage tolerant Al—Cu alloy of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8-4.7, Mg 1.0-1.6, Zr 0.06-0.18, Cr<0.15, Mn>0-0.50 , Fe?0.15, Si?0.15, and Mn-containing dispersoids, the balance essentially aluminum and incidental elements and impurities, wherein the Mn-containing dispersoids are at least partially replaced by Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant Al—Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.Type: GrantFiled: August 18, 2003Date of Patent: January 29, 2008Assignee: Aleris Aluminum Koblenz GmbHInventors: Rinze Benedictus, Christian Joachim Keidel, Alfred Ludwig Heinz, Alfred Johann Peter Haszler
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Patent number: 7323069Abstract: To cast a part, an injectable form of an aluminum-copper (206) alloy is generated and the aluminum-copper (206) alloy is injected into a mold. This mold corresponds to the part. In addition, the aluminum-copper (206) alloy is solidified to generate the part and the part is ejected from the mold.Type: GrantFiled: March 15, 2005Date of Patent: January 29, 2008Assignees: Contech U.S., LLC, Contech Operating UK, LtdInventors: Rathindra DasGupta, Zach Brown, Mark Musser
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CAST ALUMINUM ALLOY EXCELLENT IN RELAXATION RESISTANCE PROPERTY AND METHOD OF HEAT-TREATING THE SAME
Publication number: 20080000561Abstract: A cast aluminum alloy excellent in the relaxation resistance property, comprising 9 to 17% by mass of Si, 3 to 6% by mass of Cu, 0.2 to 1.2% by mass of Mg, 0.2 to 1.5% by mass of Fe, 0.1 to 1% by mass of Mn, a balance consists of Al and unavoidable impurities, wherein a Ni content is not more than 0.5% by mass. The average hardness is adjusted to HV130 to HV160 by performing, after casting, solution heating by retaining the alloy at a treatment temperature of 450 to 510° C. for 0.5 hour or longer, performing water quenching and, thereafter, performing aging treatment by retaining the alloy at a treatment temperature of 170 to 230° C. for 1 to 24 hours.Type: ApplicationFiled: June 27, 2007Publication date: January 3, 2008Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hajime IKUNO, Akira Yamada, Hiroshi Hohjo, Hiroshi Kawahara, Shoji Hotta, Isamu Ueda -
Patent number: 7294213Abstract: The invention relates to a work-hardened product, particularly a rolled, extruded or forged product, made of an alloy with the following composition (% by weight): Cu 3.8-4.3; Mg 1.25-1.45; Mn 0.2-0.5; Zn 0.4-1.3; Fe<0.15; Si<0.15; Zr?0.05; Ag<0.01, other elements <0.05 each and <0.15 total, remainder Al treated by dissolution, quenching and cold strain-hardening, with a permanent deformation of between 0.5% and 15%, and preferably between 1.5% and 3.5%. Cold strain-hardening can be achieved by controlled tension and/or cold transformation, for example rolling, die forging or drawing. This cladded metal plate type product is a suitable element to be used as aircraft fuselage skin.Type: GrantFiled: July 7, 2003Date of Patent: November 13, 2007Assignee: Pechiney RhenaluInventors: Timothy Warner, Ronan Dif, Bernard Bes, Herve Ribes
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Patent number: 7252723Abstract: New alloys for potential use in applications such as in lower wing skins and fuselage skins are disclosed. Specifically, Mn-free 2×24 alloys potentially suitable for thick plate and thin plate and sheet applications are believed to be novel and to provide unexpectedly superior properties.Type: GrantFiled: July 9, 2003Date of Patent: August 7, 2007Assignee: Pechiney RhenaluInventors: Ronan Dif, Timothy Warner, Bernard Bes
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Patent number: 7229508Abstract: An aluminum alloy having improved strength and ductility, comprising: Cu 3.5–5.8 wt. %, Mg 0.1–1.8 wt. % Mn 0.1–0.8 wt. % Ag 0.2–0.8 wt. % Ti 0.02–0.12 wt. % and optionally one or more selected from the group consisting of Cr 0.1–0.8 wt. %, Hf 0.1–1.0 wt. %, Sc 0.03–0.6 wt. %, and V 0.05–0.15 wt. %. balance aluminum and incidental elements and impurities, and wherein the alloy is substantially zirconium-free.Type: GrantFiled: May 26, 2004Date of Patent: June 12, 2007Assignees: Alcan Rolled Products-Ravenswood, LLC, Alcan RhenaluInventors: Alex Cho, Vic Dangerfield, Bernard Bès, Timothy Warner
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Patent number: 7229509Abstract: An improved aluminum lithium alloy comprising 0.1 to 2.5 wt. % Li, 2.5 to 5.5 wt. % Cu, 0.2 to 1.0 wt. % Mg, 0.2 to 0.8 wt. % Ag, 0.2 to 0.8 wt. % Mn, up to 0.4 wt. % Zr or other grain refiner such as chromium, titanium, hafnium, scandium or vanadium, the balance aluminum. The present alloy exhibits an improved combination of strength and fracture toughness, over any thickness range. The present invention is further directed to methods for preparing and using Al—Li alloys as well as to products comprising the same.Type: GrantFiled: May 26, 2004Date of Patent: June 12, 2007Assignee: Alcan Rolled Products Ravenswood, LLCInventor: Alex Cho
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Patent number: 7214279Abstract: An Al/Cu/Mg/Mn alloy for the production of semi-finished products with high static and dynamic strength properties has the following composition: 0.3–0.7 wt % silicon (Si), max. 0.15 wt. % iron (Fe), 3.5–4.5 wt % copper (Cu), 0.1–0.5 wt. % manganese (Mn), 0.3–0.8 wt. % magnesium (Mg), 0.5–0.15 wt % titanium (Ti), 0.1–0.25 wt % zirconium (Zr), 0.3–0.7 wt. % silver (Ag), max. 0.05 wt. % others individually, max 0.15 wt. % others globally, the remaining wt. % aluminum (Al). The invention further relates to a semi-finished product made for such an alloy and a method of production of a semi-finished product made for such an alloy.Type: GrantFiled: June 29, 2002Date of Patent: May 8, 2007Assignee: Otto Fuchs KGInventors: Gernot Fischer, Dieter Sauer, Gregor Terlinde
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Patent number: 7135077Abstract: The object of the invention is a rolled, forged or extruded aluminum alloy product more than 12 mm thick, heat treated by solutionizing, quenching and artificial aging, with a microstructure characterized by the following parameters: the fraction of recrystallized grains measured between one-quarter thickness and mid-thickness of the final wrought product is smaller than 35% by volume; the characteristic intercept distance between recrystallized areas is greater than 250 ?m, preferably greater than 300 ?m and most preferably greater than 350 ?m.Type: GrantFiled: May 16, 2001Date of Patent: November 14, 2006Assignee: Pechiney RhenaluInventor: Timothy Warner
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Patent number: 7097719Abstract: An alloy product having improved fatigue failure resistance, comprising about, by weight, 7.6 to about 8.4% zinc, about 2.0 to about 2.6% copper, about 1.8 to about 2.3% magnesium, about 0.088 to about 0.25.% Zr, about 0.01 to about 0.09.% Fe, and about 0.01 to about 0.06 w % Si the balance substantially aluminum and incidental elements and impurities The alloy product, suitable for aerospace applications, exhibits improved fatigue failure resistance than its 7055 counterpart of similar size, shape, thickness and temper.Type: GrantFiled: November 17, 2003Date of Patent: August 29, 2006Assignee: Alcoa Inc.Inventors: Gary H. Bray, John Liu, Lynn Eugene Oswald
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Patent number: 7087125Abstract: An aluminum alloy for shaped castings, the alloy having the following composition ranges in weight percent: about 6.0–8.5% silicon, less than 0.4% magnesium, less than 0.1% cerium, less than 0.2% iron, copper in a range from about 0.1% to about 0.5% and/or zinc in a range from about 1% to about 4%, the alloy being particularly suited for T5 heat treatment.Type: GrantFiled: January 28, 2005Date of Patent: August 8, 2006Assignee: Alcoa Inc.Inventors: Jen C. Lin, Cagatay Yanar, Wenping Zhang, Pål S. Jacobsen, Geir Grasmo, Michael K. Brandt, Moustapha Mbaye, Martijn Vos, Michael V. Glazoff, Knut Pettesen, Svein Jorgensen, Terje Johnsen
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Patent number: 7060139Abstract: The present invention provides a high strength aluminum alloy composition and applications of the high strength aluminum alloy composition. The alloy composition exhibits high tensile strength at ambient temperatures and cryogenic temperatures. The alloy composition can exhibit high tensile strength while maintaining a high elongation in ambient temperatures and cryogenic temperatures.Type: GrantFiled: November 8, 2002Date of Patent: June 13, 2006Assignee: UES, Inc.Inventors: Oleg N. Senkov, Svetlana V. Senkova, Madan G. Mendiratta, Daniel B. Miracle, Yuly V. Milman, Dina V. Lotsko, Alexandr I. Sirko
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Aluminum alloy products having improved property combinations and method for artificially aging same
Patent number: 6972110Abstract: Aluminum alloy products, such as plate, forgings and extrusions, suitable for use in making aerospace structural components like integral wing spars, ribs and webs, comprises about: 6 to 10 wt. % Zn; 1.2 to 1.9 wt. % Mg; 1.2 to 2.2 wt. % Cu, with Mg?(Cu+0.3); and 0.05 to 0.4 wt. % Zr, the balance Al, incidental elements and impurities. Preferably, the alloy contains about 6.9 to 8.5 wt. % Zn; 1.2 to 1.7 wt. % Mg; 1.3 to 2 wt. % Cu. This alloy provides improved combinations of strength and fracture toughness in thick gauges. When artificially aged per the three stage method of preferred embodiments, this alloy also achieves superior SCC performance, including under seacoast conditions.Type: GrantFiled: October 4, 2001Date of Patent: December 6, 2005Assignee: Alcoa Inc.Inventors: Dhruba J. Chakrabarti, John Liu, Jay H. Goodman, Gregory B. Venema, Ralph R. Sawtell, Cynthia M. Krist, Robert W. Westerlund -
Patent number: 6939416Abstract: The invention relates to a weldable, high-strength aluminium alloy wrought product, which may be in the form of a rolled, extruded or forged form, containing the elements, in weight percent, Si 0.8 to 1.3, Cu 0.2 to 1.0, Mn 0.5 to 1.1, Mg 0.45 to 1.0, Ce 0.01 to 0.25, and preferably added in the form of a Misch Metal, Fe 0.01 to 0.3, Zr<0.25, Cr<0.25, Zn<1.4, Ti<0.25, V<0.25, others each <0.05 and total <0.15, balance aluminium. The invention relates also to a method of manufacturing such an aluminium alloy product.Type: GrantFiled: July 10, 2002Date of Patent: September 6, 2005Assignee: Corus Aluminium Walzprodukte GmbHInventors: Rinze Benedictus, Guido Weber, Alfred Johann Peter Haszler, Christian Joachim Keidel
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Patent number: 6911099Abstract: A process for improving 6XXX alloys, such as 6013, preferably includes heating, hot rolling, inter-rolling thermal treatment at a very high temperature such as 1020° F. or more, again hot rolling (with or without subsequent continuous hot rolling or cold rolling or both), solution heat treating and artificial aging. The initial heating, inter-rolling, thermal treatment and solution treatment, especially the latter two, are carried out at very high temperatures such as 1030° F. Each aforesaid hot rolling stage produces substantial metal thickness reduction. The improved sheet or plate product has a substantially reduced occurrence of reduced density features revealed in scanning electron microscope examination at 500X and exhibits improved (reduced) fatigue crack growth rate providing an advantage in aerospace applications such as fuselage skin, especially fuselage belly skin.Type: GrantFiled: October 29, 2002Date of Patent: June 28, 2005Assignee: Alcoa Inc.Inventors: Paul E. Magnusen, Dhruba J. Chakrabarti, Anne E. Zemo, Robert W. Westerlund, Anthony Morales, Daniel T. Moulton
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Patent number: 6908590Abstract: All aluminum alloy is disclosed that includes 6.5 to 8.5 percent silicon, 0.6 to 1.0 percent iron, 0.0 to 0.5 percent manganese, 0.35 to 0.65 percent magnesium, 0.0 to 1.0 percent zinc, 0.0 to 0.2 percent titanium, 2.0 to 2.5 percent copper, and aluminum as the remainder with further one or more other elements that are 0.0 to 0.15 percent of the weight of the aluminum alloy. An aluminum alloy of the above composition is high in strength and suitable for use with SSM methods of casting, such as Rheocasting and Thixocasting.Type: GrantFiled: March 19, 2002Date of Patent: June 21, 2005Assignee: SPX CorporationInventor: Rathindra DasGupta
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Patent number: 6866817Abstract: An aluminum based material includes the elements of scandium (Sc), silicon (Si), magnesium (Mg), zirconium (Zr), copper (Cu), and aluminum (Al). Thus, the aluminum based material can be used to make a heatsink plate having a heatsink effect of 20%, so that the aluminum based material has a greater conductivity and heatsink effect. In addition, the aluminum crystal has a fined size smaller than 0.1 nanometer (0.1 nm), thereby facilitating the later working process, so that the aluminum based material can be worked easily and conveniently.Type: GrantFiled: July 14, 2003Date of Patent: March 15, 2005Inventor: Chung-Chih Hsiao
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Patent number: 6846369Abstract: A method for producing a cast aluminum alloy article having high strength and/or toughness is provided. The method includes providing a molten aluminum alloy, centrifugally casting the molten aluminum alloy to form a cast body; and hot isostatically processing the cast body to form a hipped body. The hipped body may optionally be solution heat treated to form a heat treated body, which may subsequently be precipitation hardened to further enhance the properties of the cast product as desired. The method allows the production of cast aluminum alloy articles having physical and mechanical properties similar to those obtained for articles produced from corresponding aluminum alloy chemistries by wrought techniques.Type: GrantFiled: September 7, 2000Date of Patent: January 25, 2005Assignee: Johnson Brass & Machine Foundry, Inc.Inventors: Steven A. Clark, Balathandan S. Pillai
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Patent number: 6843863Abstract: Aluminum alloy compositions are disclosed, which include small amounts of calcium that result in improved surface properties of the cast aluminum. The calcium, and up to 0.25% grain refiners, are added along with alkaline earth metals, transition metals and/or rare earth metals to the aluminum alloy as a melt. The addition results in improved appearance, substantially reduced surface imperfections and reduced surface oxidation in cast ingot aluminum and aluminum alloys. The addition of small amounts of these additives, surprisingly were found to substantially eliminate vertical folds, pits and ingot cracking in more than one ingot casting technique. The additions also improved the appearance of the ingots, including reflectance. As a result, the ingots could be reduced or worked essentially right out of the casting without first conditioning the surface by, for example, scalping.Type: GrantFiled: January 18, 2002Date of Patent: January 18, 2005Assignee: Alcoa Inc.Inventors: David H. DeYoung, William F. McGinnis, Ray T. Richter, Jeffrey J. Wiesner
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Patent number: 6790407Abstract: The present invention relates to high-strength aluminium-based alloy of Al—Zn—Mg—Cu system and the article made thereof. Said alloy can be used as a structural material in aircraft- and rocket engineering, and for fabricating the articles for transportation- and instrument engineering. The advantage of the suggested alloy is its high strength and the required level of service properties combined with sufficient technological effectiveness necessary for fabricating various wrought semiproducts, mainly of large sizes. Said alloy has the following composition (in wt %): zinc 7.6-8.6 magnesium 1.6-2.3 copper 1.4-1.95 zirconium 0.08-0.20 manganese 0.01-0.1 iron 0.02-0.15 silicon 0.01-0.1 chrome 0.01-0.05 nickel 0.0001-0.03 beryllium 0.0001-0.005 bismuth 0.00005-0.0005 hydrogen 0.08 × 10−5-2.Type: GrantFiled: June 25, 2003Date of Patent: September 14, 2004Assignees: Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie “Vserossiisky auchno-Issledovatelsky Institut Aviatsionnykh Materialov”, Otkrytoe Aktsionernoe Obschestvo “Samrsky Metallurgichesky Zavod”Inventors: Iosif Naumovich Fridlyander, Evgeny Nikolaevich Kablov, Olga Grigorievna Senatorova, Svetlana Fedorovna Legoshina, Vladimir Nikolaevich Samonin, Alexandr Juvenarievich Sukhikh, Johannes Koshorst
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Publication number: 20040140018Abstract: A process for producing an aluminum alloy-made forged scroll part includes a step of casting an aluminum alloy material into a round bar having a diameter of 130 mm or less, the aluminum alloy material comprising 8.0-12.5 mass % of Si, 1.0-5.0 mass % of Cu and 0.2-1.3 mass % of Mg; a step of cutting the aluminum alloy round bar into a stock material for forging; a step of subjecting the stock material to upsetting at an upsetting ratio of 20-70% to form a pre-shaped product that is a workpiece; and a forging step of applying pressure onto the workpiece with a punch at a temperature of 300-450° C. to form a scroll wrap in a direction of the punch pressure, and wherein the forging step includes a single step in which a forged scroll part is press-formed while a back pressure smaller than the punch pressure is applied to an end of the scroll wrap in a direction opposite to the punch pressure direction.Type: ApplicationFiled: January 7, 2004Publication date: July 22, 2004Applicant: SHOWA DENKO K.K.Inventors: Masahiro Sato, Fumihiko Ohmi, Yuichi Ogura
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Publication number: 20040112480Abstract: The present invention concerns a balanced Al—Cu—Mg—Si alloy having a high toughness, good strength levels and an improved fatigue crack growth resistance, comprising essentially the following composition (in weight percent) : Cu: 3.6-4.9, Mg: 1.0-1.8, Mn:≦0.50, preferably <0.30, Si: 0.10-0.40, Zr:≦0.15, Cr:≦0.15, Fe:≦0.10, the balance essentially aluminum and incidental elements and impurities. There is also disclosed a method for producing the balanced Al—Cu—Mg—Si alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.Type: ApplicationFiled: August 18, 2003Publication date: June 17, 2004Inventors: Rinze Benedictus, Christian Joachim Keidel, Alfred Ludwig Heinz, Alfred Johann Peter Haszler
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Publication number: 20040115087Abstract: An aluminum-based material and method of manufacturing products from the aluminum-based material formed by a solid solution of zinc, magnesium and copper in aluminum with dispersed phase particles of aluminum, zinc, magnesium and copper essentially evenly distributed in the solution and particles of nickel aluminide being essentially evenly distributed in the matrix of the aluminum-based material that contains particles, essentially evenly distributed in the matrix, of at least one of the aluminides group such as chromium aluminide and zirconium aluminide, with a total content of 0.1-0.5% of the volume with the maximum amount of nickel aluminide particles being 3 &mgr;m and the proportion between the maximum and minimum amount of nickel aluminide particles of no more than 2 and with the maximum amount of chromium aluminide and zirconium aluminide particles is 0.Type: ApplicationFiled: June 9, 2003Publication date: June 17, 2004Inventors: Andrei Anatolyevich Axenov, Nikolay Alexandrovich Belov, Vadim Semenovich Zolotorevskij
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Patent number: 6743308Abstract: The present invention provides an aluminum alloy structural plate excelling in strength and corrosion resistance, in particular, resistance to stress corrosion cracking, and a method of manufacturing the aluminum alloy plate. This aluminum alloy structural plate includes 4.8-7% Zn, 1-3% Mg, 1-2.5% Cu, and 0.05-0.25% Zr, with the remaining portion consisting of Al and impurities, wherein the aluminum alloy structural plate has a structure in which grain boundaries with a ratio of misorientations of 3-10° is 25% or more at the plate surface. The aluminum alloy structural plate is manufactured by: homogenizing an ingot of an aluminum alloy having the above composition; hot rolling the ingot; repeatedly rolling the hot-rolled product at 400-150° C. so that the degree of rolling is 70% or more to produce a plate with a specific thickness, or repeatedly rolling the hot-rolled product at a material temperature of 400-150° C. in a state in which rolls for hot rolling are heated at 40° C.Type: GrantFiled: November 2, 2001Date of Patent: June 1, 2004Assignees: Kabushiki Kaisha Kobe Seiko Sho., Sumitomo Light Metal Industries, Ltd., Nippon Light Metal Co., Ltd., The Furukawa Electric Co., Ltd., Mitsubishi Aluminum Co., Ltd.Inventors: Hiroki Tanaka, Hiroki Esaki, Tadashi Minoda
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Publication number: 20040099352Abstract: An aluminum alloy extrusion product having improved strength and fracture toughness, the aluminum base alloy comprised of 1.95 to 2.5 wt. % Cu, 1.9 to 2.5 wt. % Mg, 8.2 to 10 wt. % Zn, 0.05 to 0.25 wt. % Zr, max. 0.15 wt. % Si, max. 0.15 wt. % Fe, max. 0.1 wt. % Mn, the remainder aluminum and incidental elements and impurities.Type: ApplicationFiled: September 15, 2003Publication date: May 27, 2004Inventors: Iulian Gheorghe, Dean C. Malejan, Rene Machler
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Publication number: 20040099353Abstract: Disclosed is a high damage tolerant Al—Cu alloy of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8-4.7, Mg 1.0-1.6, Zr 0.06-0.18, Cr<0.15, Mn>0-0.50 , Fe≦0.15, Si≦0.15, and Mn-containing dispersoids, the balance essentially aluminum and incidental elements and impurities, wherein the Mn-containing dispersoids are at least partially replaced by Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant Al—Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.Type: ApplicationFiled: August 18, 2003Publication date: May 27, 2004Inventors: Rinze Benedictus, Christian Joachim Keidel, Alfred Ludwig Heinz, Alfred Johann Peter Haszler
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Publication number: 20040089378Abstract: The present invention provides a high strength aluminum alloy composition and applications of the high strength aluminum alloy composition. The alloy composition exhibits high tensile strength at ambient temperatures and cryogenic temperatures. The alloy composition can exhibit high tensile strength while maintaining a high elongation in temperatures and cryogenic temperatures.Type: ApplicationFiled: November 8, 2002Publication date: May 13, 2004Inventors: Oleg N. Senkov, Svetlana V. Senkova, Madan G. Mendiratta, Daniel B. Miracle, Yuly V. Milman, Dina V. Lotsko, Alexandr I. Sirko
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Publication number: 20040079455Abstract: New alloys for potential use in applications such as in lower wing skins and fuselage skins are disclosed. Specifically, Mn-free 2×24 alloys potentially suitable for thick plate and thin plate and sheet applications are believed to be novel and to provide unexpectedly superior properties.Type: ApplicationFiled: July 9, 2003Publication date: April 29, 2004Applicant: PECHINEY RHENALUInventors: Ronan Dif, Timothy Warner, Bernard Bes
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Patent number: 6726878Abstract: The invention relates to high strength aluminium—based alloy of Al—Zn—Mg—Cu system and the articles made thereof. The present alloy is characterized by the combination of improved properties: flowability, technological plasticity, fracture toughness while preserving high levels of strength properties. Said alloy comprises (mass. %): Zn 6.35-8.0 Si 0.01-0.2 Mg 0.5-2.5 Fe 0.06-0.25 Cu 0.8-1.3 Zr 0.07-0.2 Cr 0.001-0.05 Ti 0.03-0.1 Mn 0.001-0.1 Be 0.0001-0.05 and at least one element from the group of alkali-earth metals: K 0.0001-0.01 Na 0.0001-0.01 Ca 0.0001-0.01 Al-balance the sum Zr+2Ti≦0.3%, and the ratio Si:Be≧2.Type: GrantFiled: May 22, 2002Date of Patent: April 27, 2004Assignees: Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie “Vserossiisky Nauchno-Issle-Dovatelsky Institut Aviatsionnykh Materialov”, Otkrytoe Aktsionernoe Obschestvo “Samarsky Metallurgichesky Zavod”Inventors: Iosif Naumovich Flidlyander, Evgeny Nikolaevich Kablov, Evgeniya Anatolievna Tkachenko, Vladimir Nikolaevich Samonin, Viktor Yakovlevich Valkov
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Publication number: 20040060618Abstract: Disclosed is an Al—Cu alloy of the AA2000-series alloys with high toughness and an improved strength, including the following composition (in weight percent) Cu 4.5-5.5, Mg 0.5-1.6, Mn≧0.80, Zr≧0.18, Cr≧0.18, Si≧0.15, Fe≧0.15, the balance essentially aluminum and incidental elements and impurities, and wherein the amount (in weight %) of magnesium is either: (a) in a range of 1.0 to 1.6%, or alternatively (b) in a range of 0.50 to 1.2% when the amount of dispersoid forming elements such as Cr, Zr or Mn is controlled and (in weight %) in a range of 0.10 to 0.70%.Type: ApplicationFiled: August 13, 2003Publication date: April 1, 2004Inventors: Rinze Benedictus, Christian Joachim Keidel, Alfred Ludwig Heinz, Alfred Johann Peter Haszler, Hinrich Johannes Wilhelm Hargarter
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Patent number: 6706242Abstract: Heat resistant Al die cast material having 12.5% to 14.0% of Si, 3.0% to 4.5% of Cu, 1.4% to 2.0% of Mg, and 1.12% to 2.4% of Zn. The die cast metal becomes amenable to age hardening treatment when appropriate amounts of Mg and Zn are added to an Al—Si—Cu alloy for enhancing mechanical strength and seizure characteristics.Type: GrantFiled: March 27, 2002Date of Patent: March 16, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Norimasa Takasaki, Yuuko Yoshimura
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Publication number: 20040045638Abstract: The invention concerns a safety component with high mechanical strength and good ductility, moulded in Al—Si alloy consisting (in wt. %) of: Si: 2-11; Mg: 0.3-0.7; Cu: 0.3 0.9; other elements <1 each and <2 in total, the rest being aluminium, and solution heat treated, tempered and hardened resulting in Brinell hardness of more than 125. The invention also concerns a safety component with high mechanical resistance and good ductility, moulded in Al—Si alloy consisting (in wt. %) of: Si: 2-6; Mg: 0.3-0.7; Fe <0.20; other elements <0.3 each and <1 in total; the rest being aluminium; solution heat treated, hardened and tempered resulting in a quality index Q=Rm+log A>485 MPa.Type: ApplicationFiled: July 22, 2003Publication date: March 11, 2004Inventors: Michel Garat, Francois Cosse
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Patent number: 6696175Abstract: The present invention provides aluminum alloys and layers formed in aluminum alloys as well as methods for their manufacture. Aluminum alloys of the present invention are provided with at least one discrete layer of uncrystallized grains formed therein. Alloys of the present invention can be formed, for example, by a process that includes a final partial anneal that permits softening of the material to essentially an O-temper condition. Processes of the present invention recrystallized substantially the entire material by leave a discrete layer of preferably less than 50 microns of the material unrecrystallized. In preferred embodiments, the aluminum material is a core material that is clad on one or both sides and the discrete unrecrystallized layer forms at the boundary between the clad and the core.Type: GrantFiled: January 16, 2003Date of Patent: February 24, 2004Assignee: Pechiney Rolled ProductsInventors: Scott L. Palmer, Zayna Connor, H. Scott Goodrich
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Patent number: 6685782Abstract: A suitable alloy of the alloy AlMgSi type employed for the manufacture of components having high capacity to absorb kinetic energy by plastic deformation contains, in wt. %, silicon 0.40 to 0.80 magnesium 0.40 to 0.70 iron max. 0.30 copper max. 0.20 manganese max. 0.15 vanadium 0.05 to 0.20 chromium max. 0.10 titanium max. 0.10 zinc max. 0.10 and further elements each individually at most 0.05, in total at most 0.15 and the remainder aluminium.Type: GrantFiled: November 23, 1998Date of Patent: February 3, 2004Assignee: Alcan Technology & Management Ltd.Inventor: Pius Schwellinger
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Patent number: 6679417Abstract: An efficient and effective process for manufacturing of hardened aluminum components is achieved by coordinating the material preparation steps with the forming steps. The resulting product is a hardened aluminum component with desirable strength characteristics. The process includes initial heating of sheet material in order to prepare it for further processing. The sheet material is then quenched to promote appropriate material conditioning. A product forming sub-process is then undertaken in a relatively short period of time following the quenching. The product forming is done while the material is in a relatively ductile condition, thus easing forming operations, and avoiding product spring-back problems. Lastly, the component is naturally aged, to provide the final hardening operations. The resulting product has very desirable strength characteristics, due to the combined forming and hardening process.Type: GrantFiled: June 7, 2001Date of Patent: January 20, 2004Assignee: Tower Automotive Technology Products, Inc.Inventors: Lawrence M. Dziadosz, Clarence W. Fulton
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Publication number: 20030217793Abstract: Rolled, extruded or forged product made of an AlCuMg alloy processed by solution heat treatment, quenching and cold stretching, to be used in the manufacture of aircraft structural elements, with the following composition (% by weight):Type: ApplicationFiled: June 19, 2003Publication date: November 27, 2003Applicant: PECHINEY RHENALUInventors: Timothy Warner, Philippe Lassince, Philippe Lequeu
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Publication number: 20030207141Abstract: The purpose of the invention is a structure element, particularly an lower wing element of an aircraft, manufactured from a rolled, extruded or forged product made of an alloy with composition (% by weight):Type: ApplicationFiled: April 24, 2003Publication date: November 6, 2003Applicant: PECHINEY RHENALUInventors: Timothy Warner, Philippe Lassince, Philippe Lequeu
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Patent number: 6630037Abstract: High strength and high toughness aluminum alloy forgings having, as a whole, a strength at &sgr;0.2 of 315 N/mm2 or more and an impact shock value of 20 J/cm2 or more, wherein the aluminum alloy material contains Mg: 0.6-1.6%, Si: 0.8-1.8%, Cu: 0.1-1.0%, Fe: 0.30% or less, one or more of Mn: 0.15-0.6%, Cr: 0.1-0.2% and Zr: 0.1-0.2%, and the balance of Al and inevitable impurities, wherein the volume fraction of total constituents phase particles (Mg2Si and Al—Fe—Si—(Mn, Cr, Zr) series intermetallic compounds) in the aluminum alloy structure in the forgings is 1.5% or less per unit area.Type: GrantFiled: August 24, 1999Date of Patent: October 7, 2003Assignee: Kobe Steel, Ltd.Inventors: Hiroki Sawada, Takayuki Kitano, Manabu Nakai
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Publication number: 20030155049Abstract: An improved Si—Cu—Mg—Al base alloy suitable for forming in the semi-solid condition into members such as vehicular members having improved properties.Type: ApplicationFiled: February 15, 2002Publication date: August 21, 2003Inventor: S. Craig Bergsma
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Publication number: 20030145912Abstract: Aluminium-magnesium alloy in the form of a rolled product or an extrusion, having the following composition in weight percent: 1 Mg >3.0-4.5 Mn 0.4-1.2 Zn 0.4-1.7 Zr 0.05-0.25 Cr 0.3 max. Ti 0.2 max. V 0.2 max. Li 0.5 max. Sc 0.5 max. Fe 0.5 max. Si 0.5 max. Cu 0.15 max. Ag 0.4 max. others (each) max. 0.05 (total) max. 0.15 balance aluminium.Type: ApplicationFiled: November 20, 2002Publication date: August 7, 2003Inventors: Alfred Johann Peter Haszler, Desikan Sampath, Jean Pierre Jules Baekelandt, Job Anthonius Van Der Hoeven
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Patent number: 6602361Abstract: Rolled product for use in the manufacture of aircraft structural elements, made of an AlCuMg alloy processed by solution heat treatment, quenching and cold stretching. The product has a composition consisting essentially of, in % by weight: Fe<0.15; Si<0.15; Cu:3.8-4.4; Mg:1-1.5; Mn:0.5-0.8; Zr:0.08-0.15; other elements: <0.05 each and <0.15 total. This product has a thickness of between 6 and 60 mm, with an ultimate tensile strength Rm(L) in the quenched and stretched temper >475 MPa and yield stress R0.2(L)>370 MPa, with a ratio Rm(L)/R0.2(L)>1.25.Type: GrantFiled: January 10, 2000Date of Patent: August 5, 2003Assignee: Pechiney RhenaluInventors: Timothy Warner, Philippe Lassince, Philippe Lequeu
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Patent number: 6569542Abstract: The purpose of the invention is a structure element, particularly an lower wing element of an aircraft, manufactured from a rolled, extruded or forged product made of an alloy with composition (% by weight): Cu=4.6-5.3, Mg=0.10-0.50, Mn=0.15-0.45, Si <0.10, Fe<0.15, Zn<0.20, Cr<0.10, other elements <0.05 each and <0.15 total, the remainder being Al treated by solution heat treating, quenching, controlled tension to more than 1.5% permanent deformation and aging.Type: GrantFiled: December 13, 2000Date of Patent: May 27, 2003Assignee: Pechiney RhenaluInventors: Timothy Warner, Philippe Lassince, Philippe Lequeu
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Patent number: 6565679Abstract: A novel extrudable aluminum based alloy is described consisting essentially of 0.60-0.84% magnesium, 0.45-0.58% silicon, 0.15-0.40% copper, 0.04-0.35% chromium, or 0.20-0.80% manganese, less than 0.25% iron, where Si>=(Mg/1.73+(Mn+Cr+Fe)/3−0.04), and the balance essentially aluminum. In the alloy of the present invention, the magnesium content has been reduced to the minimum possible for mechanical properties. In this way, the magnesium silicide content of the alloy has been reduced, providing a very beneficial effect on extrudability.Type: GrantFiled: March 19, 1999Date of Patent: May 20, 2003Assignee: Alcan International LimitedInventors: Paul W. Jeffrey, Christopher W. Jowett, Thiagarajan Ramanan, Nicholas C. Parson
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Patent number: 6562154Abstract: Aluminum sheet products having highly anisotropic grain microstructures and highly textured crystallographic microstructures are disclosed. The products exhibit improved strength and improved resistance to fatigue crack growth, as well as other advantageous properties such as improved combinations of strength and fracture toughness. The sheet products are useful for aerospace and other applications, particularly aircraft fuselages.Type: GrantFiled: June 12, 2000Date of Patent: May 13, 2003Assignee: Aloca Inc.Inventors: Roberto J. Rioja, Robert W. Westerlund, Anne E. Roberts, Dhruba J. Chakrabarti, Diana K. Denzer, Anthony Morales, Paul E. Magnusen, Gregory B. Venema
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Publication number: 20030087122Abstract: The invention relates to a weldable, high-strength aluminum alloy rolled product containing the elements, in weight percent, Si 0.8 to 1.3, Cu 0.2 to 0.45, Mn 0.5 to 1.1, Mg 0.45 to 1.0, Fe 0.01 to 0.3, Zr<0.25, Cr<0.25, Zn<0.35, Ti<0.25, V<0.25, others each <0.05 and total <0.15, balance aluminum, and further with the proviso that the weight percent of “available Si” is in the range of 0.86 to 1.15, preferably in the range of 0.86 to 1.05. The weight percentage (“wt.Type: ApplicationFiled: July 5, 2002Publication date: May 8, 2003Inventors: Rinze Benedictus, Guido Weber, Alfred Johann Peter Haszler, Christian Joachim Keidel
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Publication number: 20030087123Abstract: The invention relates to a weldable, high-strength aluminium alloy wrought product, which may be in the form of a rolled, extruded or forged form, containing the elements, in weight percent, Si 0.8 to 1.3, Cu 0.2 to 1.0, Mn 0.5 to 1.1, Mg 0.45 to 1.0, Ce 0.01 to 0.25, and preferably added in the form of a Misch Metal, Fe 0.01 to 0.3, Zr <0.25, Cr <0.25, Zn <1.4, Ti <0.25, V <0.25, others each <0.05 and total <0.15, balance aluminium. The invention relates also to a method of manufacturing such an aluminium alloy product.Type: ApplicationFiled: July 10, 2002Publication date: May 8, 2003Inventors: Rinze Benedictus, Guido Weber, Alfred Johann Peter Haszler, Christian Joachim Keidel