Abstract: The invention relates to a product comprising an aluminum base alloy consisting of (in weight %): Cu 3.8-4.9, Mg 1.2-1.8, Mn 0.1-0.9, Fe max. 0.12, Si max. 0.10, Ti max. 0.15, Zn max. 0.20, Cr max. 0.10, impurities each max. 0.05, total max. 0.15, balance aluminum. The product having a minimum L-0.2% yield strength of 300 MPa or more, a minimum LT-0.2% yield strength of 270 MPa, a minimum T-L fracture toughness KC(ao) of 100 MPa. {square root}m or more for a 700 mm wide CCT-panel, and has in both L/ST- and LT/ST-sections an average grain size of at least 6 according to ASTM4 E-112. Further the invention relates to a method for the manufacturing of such a product.

Abstract: There is claimed an aerospace alloy having improved corrosion resistance performance, particularly intergranular corrosion resistance. The alloy consisting essentially of: about 0.6-1.15 wt. % silicon, about 0.6-1.0 wt. % copper, about 0.8-1.2 wt. % magnesium, about 0.55-0.86 wt. % zinc, less than about 0.1 wt. % manganese, about 0.2-0.3 wt. % chromium, the balance aluminum, incidental elements and impurities. While it is preferably made into sheet or plate product forms, it can also be extruded. Products made from this alloy exhibit at least about 5% greater yield strength and about 45% or greater resistance to intergranular corrosion attack than their 6013-T6 counterparts, as measured by average depth of corrosion after 24 hours exposure to an aqueous NaCl—H2O2 solution per ASTM Standard G110 (1992).

Abstract: 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.

Abstract: An Al-Mg-Si based aluminum alloy extrusion having large strength, absorbable impact energy and resistance against compressing cracking, wherein the average size of Mg2Si precipitation in the [1 0 0] and [0 1 0] directions of the (1 0 0) plane inside grains is 20 nm or more, the distribution density of the Mg2Si precipitation in the [0 0 1] direction of the (1 0 0 ) plane is 100 or more per &mgr;m2, and the size of precipitations on grain boundaries is 1000 nm or less. Alternatively, in the Al-Mg-Si based aluminum alloy extrusion, a tensile strength obtained from a tensile test performed at a strain rate of 1000 per second is from 150 to 400 N/mm2 (both inclusive).

Abstract: The present invention relates to a cylinder head and motor block casting and a method of making the same, including an aluminum alloy having the following composition: Si 6.80-7.20, Fe 0.35-0.45, Cu 0.30-0.40, Mn 0.25-0.30, Mg 0.35-0.45, Ni 0.45-0.55 Zn 0.10-0.15, Ti 0.11-0.15 with the remainder being aluminum as well as unavoidable impurities with a maximum content of 0.05 each, but not more than a maximum of 0.15 impurities in all.

Abstract: An aluminum alloy sheet material, containing 2.6% by mass or more and less than 3.5% by mass (% by mass is simply denoted by % hereinafter) of Si, 0.05 to 0.5% of Mg, 0.5% or more and less than 1.2% of Cu, 0.6 to 1.5% of Mn, 0.5 to 1.6% of Zn, and 0.3 to 2.0% of Fe, and containing, if necessary, at least one of 0.01 to 0.2% of Cr, 0.01 to 0.2% of Zr, 0.01 to 0.2% of V, and 0.01 to 0.2% of Ti, with the balance of Al and unavoidable impurities. A method of producing the aluminum alloy sheet material, which method contains carrying out specific workings.

Abstract: An Al—Mg—Si—Cu aluminum alloy plate excelling in strength and formability and exhibiting improved filiform corrosion resistance which is suitably used for automotive body panels. The aluminum alloy plate contains 0.25-0.6% of Mg (mass %, hereinafter the same), 0.9-1.1% of Si, 0.6-1.0% of Cu, and at least one of 0.20% or less of Mn and 0.10% or less of Cr, with the balance consisting of Al and impurities, wherein the number of Q phases (Cu—Mg—Si—Al phases) with a size of 2 &mgr;m or more in diameter present in a matrix is 150 per mm2 or more. The aluminum alloy plate is fabricated by homogenizing an ingot of an aluminum alloy having the above composition at 530° C. or more, cooling the ingot to 450° C. or less at a cooling rate of 30° C./hour or less, hot-rolling the ingot, cold-rolling the hot-rolled product, and providing the cold-rolled product with a solution heat treatment.

Abstract: An aluminum alloy plate for an automobile has a chemical composition containing 0.8 to 1.5% by mass of Si, 0.4 to 0.7% by mass of Mg and 0.5 to 0.8% by mass of Cu. The crystal grain size is 10 to 40 &mgr;m. Cu content obtained by analyzing the outermost surface of the aluminum alloy with an oxide film according to X-ray photoelectron spectroscopy (XPS) is {fraction (1/10)} to ½ of the Cu content of the bulk of the aluminum alloy plate.

Abstract: 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.

Abstract: An alloy of composition in wt. % (see table (I)) and incidental impurities up to 0.05 each 0.15 total, balance A1. The alloy can be extruded at high speed to provide extruded sections which meet T5 or T6 strength requirements.

Abstract: Stress relieving of an age hardenable aluminium alloy product after solution heat treatment and quenching, is carried out by a permanent cold plastic deformation applied by the steps: (a) applying a stress-relieving cold mechanical stretch to said product, and (b) applying a stress-relieving cold compression to said product. This combined treatment gives improved strength and toughness and at least comparable distortion after machining.

Abstract: The present invention relates to a cylinder head and motor block casting and a method of making the same, including an aluminum alloy having the following composition: Si 6.80-7.20, Fe 0.35-0.45, Cu 0.30-0.40, Mn 0.25-0.30, Mg 0.35-0.45, Ni 0.45-0.55 Zn 0.10-0.15, Ti 0.11-0.15 with the remainder being aluminum as well as unavoidable impurities with a maximum content of 0.05 each, but not more than a maximum of 0.15 impurities in all.

Abstract: The invention relates to a product comprising an aluminum base alloy consisting of (in weight %): Cu 3.8-4.9, Mg 1.2-1.8, Mn 0.1-0.9, Fe max. 0.12, Si max. 0.10, Ti max. 0.15, Zn max. 0.20, Cr max. 0.10, impurities each max. 0.05, total max. 0.15, balance aluminum. The product having a minimum L-0.2% yield strength of 300 MPa or more, a minimum LT-0.2% yield strength of 270 MPa, a minimum T-L fracture toughness Kc(ao) of 100 MPa.{square root}m or more for a 700 mm wide CCT-panel, and has in both L/ST- and LT/ST-sections an average grain size of at least 6 according to ASTM E-112. Further the invention relates to a method for the manufacturing of such a product.

Abstract: An Al—Mg—Si based aluminum alloy extrusion having large strength, absorbable impact energy and resistance against compressing cracking, wherein the average size of Mg2Si precipitation in the [1 0 0] and [0 1 0] directions of the (1 0 0) plane inside grains is 20 nm or more, the distribution density of the Mg2Si precipitation in the [0 0 1] direction of the (1 0 0) plane is 100 or more per &mgr;m2, and the size of precipitations on grain boundaries is 1000 nm or less. Alternatively, in the Al—Mg—Si based aluminum alloy extrusion, a tensile strength obtained from a tensile test performed at a strain rate of 1000 per second is from 150 to 400 N/mm2 (both inclusive).

Abstract: 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): 1 Fe<0.15 Si<0.15 Cu:3.8-4.4 Mg:1-1.5 Mn:0.5-0.8 Zr:0.08-0.

Abstract: An energy-absorbing member of extruded aluminum alloy which is composed of Mg (0.5-1.6 wt %), Zn (4.0-7.0 wt %), Ti (0.005-0.3 wt %), Cu (0.05-0.6 wt %), and at least one of the following elements: Mn (0.2-0.7 wt %), Cr (0.03-0.3 wt %), and Zr (0.05-0.25 wt %), with the remainder being Al and inevitable impurities, said energy-absorbing member having a hollow cross-section and fiber structure and being one which has undergone averaging treatment.

Abstract: An Al—Mg—Si—Cu aluminum alloy plate excelling in strength and formability and exhibiting improved filiform corrosion resistance which is suitably used for automotive body panels. The aluminum alloy plate contains 0.25-0.6% of Mg (mass %, hereinafter the same), 0.9-1.1% of Si, 0.6-1.0% of Cu, and at least one of 0.20% or less of Mn and 0.10% or less of Cr, with the balance consisting of Al and impurities, wherein the number of Q phases (Cu—Mg—Si—Al phases) with a size of 2 &mgr;m or more in diameter present in a matrix is 150 per mm2 or more. The aluminum alloy plate is fabricated by homogenizing an ingot of an aluminum alloy having the above composition at 530° C. or more, cooling the ingot to 450° C. or less at a cooling rate of 30° C./hour or less, hot-rolling the ingot, cold-rolling the hot-rolled product, and providing the cold-rolled product with a solution heat treatment.

Abstract: An object of the present invention is to provide an aluminum-alloy-made forged scroll part in which harmful primary Si crystals are not formed and variation in wrap height between the scrolls is low. The present invention also provides a process for producing the forged scroll part. An alloy material including Si: 8.0-12.5%; Cu: 1.0-5.0%; Mg: 0.2-1.3%; and if necessary, Ni: 2.0% or less and/or one or more species selected from among Sr, Ca, Na, and Sb: total 0.5% or less, is cast through continuous casting into a round bar material having a diameter of 130 mm&phgr; or less, and subsequently, the material is subjected to upsetting and hot forging with back pressure to produce a forged scroll part containing substantially no Si particles having a size of 15 &mgr;m or more, the mean size of Si particles in the forged part being 3 &mgr;m or less.

Abstract: The purpose of the invention is a process for manufacturing hollow pressure vessels, particularly compressed gas cylinders, comprising the following steps:

Abstract: A mold for plastics made of a rolled, extruded or forged AlZnMgCu aluminum alloy product >60 mm thick, and having a composition including, in weight %: 5.7 < Zn < 8.7 1.7 < Mg < 2.5 1.2 < Cu < 2.2 Fe < 0.14 Si < 0.11 0.05 < Zr < 0.15 Mn < 0.02 Cr < 0.02 with Cu+Mg<4.1 and Mg>Cu, other elements<0.05 each and<0.10 in total, the product being treated by solution heat treating, quenching and aging to a T6 temper.

Abstract: The present invention is a method for producing an iron-containing hypoeutectic alloy free from primary platelet-shaped beta-phase of the Al5FeSi in the solidified structure by the steps (a) providing an iron-containing aluminum alloy having a composition within the following limits, in weight percent, 6-10% Si, 0.05-1.0% Mn, 0.4-2% Fe, at least one of 1) 0.01-0.8% Ti and/or Zr 2) 0.005-0.5% Sr and/or Na and/or Ba, 0-6.0% Cu, 0-2.0% Cr, 0-2.0% Mg, 0-6.0% Zn, 0-0.

Abstract: The invention relates to a process for producing anodic coatings with superior corrosion resistance and other properties on aluminum and aluminum alloy surfaces by cryogenically treating the aluminum prior to anodizing. The invention also relates to the anodic coatings and to the anodically coated articles produced by the process. The anodized coating has a thickness of 0.001 to 0.5 mm and a time to penetration of at least 5 hours for aqueous solutions of HCl.

Abstract: An aluminum-based alloy useful for driveshaft assemblies and method of manufacturing an extruded tube of such alloy. The alloy includes, in weight %, 0.50 to 0.70% Si, up to 0.30% Fe, 0.20 to 0.40% Cu, up to 0.03% Mn, 0.80 to 1.10% Mg, up to 0.03% Cr, balance Al and impurities. In producing extruded tubing, the alloy is extruded, the extruded billet is water quenched, the quenched tube is drawn in a two-stage drawing operation and the drawn tube is given a precipitation hardening treatment.

Abstract: A free-cutting aluminum alloy without lead as an alloy element, containing: (a) as alloy elements: 0.5 to 1.0 wt. % Mn; 0.4 to 1.8 wt. % Mg; 3.3 to 4.6 wt. % Cu; 0.4 to 1.9 wt. % Sn; 0 to 0.1 wt. % Cr; 0 to 0.2 wt. % Ti; (b) as impurities: up to 0.8 wt. % Si; up to 0.7 wt. % Fe; up to 0.8 wt. % Zn; up to 0.1 wt. % Pb; up to 0.1 wt. % Bi; up to 0.3 wt. % total of other impurities; and (c) the balance being substantially aluminum. The process includes the steps of semicontinuously casting the above alloy composition followed by homogenization annealing, cooling, heating to a working temperature for extrusion, extruding at a maximum temperature of 380° C., followed by press-quenching and aging. The aging may be a natural aging or an artificial aging. A cold working step and/or a tension straightening step also may be conducted after the press-quenching step. The extruding step includes indirectly extruding.

Abstract: A process of producing an aluminum alloy sheet product suitable for forming into automotive parts and exhibiting reduced roping effects. The process involves producing an aluminum alloy sheet product by direct chill casting an aluminum alloy to form a cast ingot, homogenizing the ingot, hot rolling the ingot to form and intermediate gauge product, cold rolling the intermediate gauge product to form a product of final gauge, and subjecting the final gauge product to a solutionizing treatment by heating the product to a solutionizing temperature, followed by a pre-aging step involving cooling the product to a coiling temperature above 50.degree. C., coiling the cooled product at the coiling temperature, and cooling the coiled final gauge product from the coiling temperature above 50.degree. C. to ambient temperature at a rate less than about 10.degree. C. per hour to improve T8X temper characteristics of the product.

Abstract: An aluminum alloy strip useful for can stock having a thickness of less than or equal to about 30 mm, and containing large (Mn,Fe)Al.sub.6 intermetallics as principal intermetallic particles in said strip. The intermetallic particles have an average surface size at a surface of the strip and an average bulk size in a bulk of the strip, the average surface size being greater than the average bulk size. The strip article may be produced by supplying a molten aluminum alloy having a composition consisting, in addition to aluminum, essentially by weight of: Si between 0.05 and 0.15%; Fe between 0.3 and 0.6%; Mn between 0.6 and 1.2%; Mg between 1.1 and 1.8%; Cu between 0.2 and 0.6%; and other elements: less than or equal to 0.05% each element with a maximum of 0.2% for the total of other elements; and casting the molten alloy in a continuous caster having opposed moving mold surfaces to an as-cast thickness of less than or equal to 30 mm.

Abstract: Disclosed is a method of making lithium-containing aluminum base alloy extrusion having at least a section thereof having a low aspect ratio or which is generally axisymmetrical, the extrusions having improved properties in sections thereof having the low aspect ratio or which are axisymmetrical. The method comprises providing a body of a lithium-containing aluminum alloy, pressing a portion of the body which is to form the axisymmetrical or low aspect ratio section through a tortuous path and extruding an axisymmetrical or a low aspect ratio extrusion section. The axisymmetrical or low aspect ratio section of the extrusion has a tensile strength of at least 60 ksi and an ultimate yield strength at least 4.5 ksi greater than the tensile yield strength.

Abstract: A metal sheet with a total thickness >0.5 mm comprising an AlCuMg aluminum alloy consisting essentially of Al and, in percent by weight:______________________________________ 3.5 < Cu < 5.0 1.0 < Mg < 2.0 Si < 0.25 Fe < 0.25 Mn < 0.55 ______________________________________all other elements: <0.25with 0<Mn-2Fe<0.2,optionally plated with another aluminum alloy with the thickness of the plating being no more than 12% of the total thickness of the sheet, the sheet having a recrystallization rate >50% at all points and a deviation in recrystallization rate between surface and mid-thickness <35%, the sheet having in the quenched and stretched state or in the quenched, stretched and annealed state, a deflection after machining to mid-thickness of a bar resting on two distant supports with a length l such that:fe<0.14l.sup.2,where f is the deflection expressed in micrometers, e being the thickness of the sheet in mm and l is the length of the bar in mm.

Abstract: A superplastically formable, aluminum alloy product which consists essentially of about 2-10 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: up to about 1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of at least about 0.0003/sec and a superplastic forming temperature between about 1000-1100.degree. F. due, in part, to the preferred thermomechanical processing steps subsequently applied thereto. A related method of manufacture is also disclosed herein.

Abstract: An aluminum alloy containing Si: 1.5-12% (mass % here and hereinafter), Mg: 0.5-6% and, optionally, at least one of Mn: 0.5-2%, Cu: 0.15-3% and Cr: 0.04-0.35% and, further, containing Ti: 0.01-0.1% and the balance of Al and inevitable impurities, in which the average grain size of crystallized grains of Si system compounds is from 2 to 20 .mu.m and an area ratio thereof is from 2 to 12%. The alloy is melted to obtain a cast ingot having DAS (Dendrite Arm Spacing) of 10 to 50 .mu.m, which is then put to a soaking treatment at 450 to 520.degree. C. and then to extrusion molding. The aluminum alloy has excellent machinability with no addition of low melting metals.

Abstract: The present invention relates to a process for producing a superplastic aluminum alloy capable of being used for plastic working such as extrusion, forging and rolling. An object of the present invention is to provide an ingot-made high speed superplastic aluminum alloy in which superplasticity is developed at a strain rate higher than that of conventional static recrystallization type superplastic aluminum alloys, and a process for producing the same. The superplastic aluminum alloy of the invention has structure which is obtained by adding to a basic alloy containing from at least 4.0 to 15% by weight of Mg and from 0.1 to 1.0% by weight of one or more elements selected from the group consisting of Mm, Zr, V, W, Ti, Ni, Nb, Ca, Co, Mo and Ta, and further selective elements of Sc, Cu. Li, Sn, In and Cd, which contains from 0.1 to 4.0% by volume fraction of spheroidal precipitates of intermetallic compounds having a particle size from 10 to 200 nm, and which has a mean grain size from 0.1 to 10 .mu.m.

Abstract: A heat treatable 7000 series aluminum alloy has a micro-structure with a crystal grain size of 45 .mu.m or less and an aspect ratio (longitudinal/long transverse ratio of crystal grain) of preferably 4 or less, whereby its corrosion resistance is improved outstandingly by applying a solution heat treatment and hardening and subsequently, applying an aging treatment at 100 to 145.degree. C. for 5 to 50 hr, a reversion treatment at 140 to 195.degree. C. for 0.5 to 30 hr. and a re-aging treatment at 100 to 145.degree. C. for 5 to 50 hr. to thereby make an electroconductivity to 38-40 IACS %, and render the micro-structure so as to have a minimum distance for the .eta. phase on the crystal grain boundary of 20 nm or more and a maximum size for the .eta.' phase in the crystal grain of 20 nm or less.

Abstract: A rolled, forged or extruded AlZnMgCu alloy product, used to manufacture structural elements for aircraft, particularly wing spars. The product is greater than 60 mm thick, and has a composition (% by weight):5.7<Zn<8.71.7<Mg<2.51.2<Cu<2.20.07<Fe<0.14Si<0.110.05<Zr<0.15Mn<0.02Cr<0.02with Cu+Mg<4.1, and Mg>Cu,other elements <0.05 each and <0.10 in total. The product is treated by solution heat treating, quenching and possibly aging, and has in the treated T7451 or T7452 temper the following properties:a) a yield strength measured at quarter-thickness>400 MPa in the L and TL directions,b) toughness under plane strain in the S-L direction>26 MPa.sqroot.m and in the L-T direction >74-0.08e-0.07R.sub.0.2L MPa.sqroot.m (e=thickness in mm), andc) a stress corrosion threshold>240 MPa.

Abstract: An aluminum alloy for use in castings, comprising 0.0005-0.01 weight % of Fe, 0.0005-0.01 weight % of Si, 2.5-6.5 weight % of Cu, 0.10-0.50 weight % of Mg, 0.001-0.40 weight % of Mn, 0.10-0.50 weight % of Ti, 0.20-1.2 weight % of Ag, 0.002-0.01 weight % of B, no more than 0.01 weight % of any other individual component aside from Al, and the balance Al. The aluminum alloy is thereby designed to provide improved toughness without detracting from tensile strength, proof stress, and hardness.

Abstract: Spray atomization of molten metal and/or intermetallic matrix composites reinforced with ceramic particles is practiced by atomizing the matrix into micron sized droplets and depositing the semisolid droplets in a bulk deposition upon a temperature controlled substrate. The semiliquid droplets are injected with refinement particles while in a range of 0 to 40% by volume solid phase and deposited on the substrate surface while in a 40 to 90% by volume solid phase. Refined grain morphology, increased solid solubility, nonequilibrium phases, absence of macro segregation, and elimination of the need to handle fine reactive particles are all achieved by performing the spray deposition process under a controlled atmosphere. Materials fabricated by the process exhibit unusual combinations of properties, such as spatially varying properties.

Abstract: An improved method of forming a severe bend or a hem in a sheet of wrought aluminum age-hardened and age-hardenable alloy includes heating the region to be bent or hemmed to a temperature above about 250.degree. C. for a period of seconds and then quenching the heated region to remove the age-hardening effect and thereafter accomplishing the bend or hem before age hardening of the heated region occurs.

Abstract: A product comprising an aluminum base alloy including about 3.8 wt. % copper, about 1.2 wt. % magnesium, about 0.3 to 0.6 wt. % manganese, not more than about 0.15 wt. % silicon, not more than about 0.12 wt. % iron, not more than about 0.1 wt. % titanium, the remainder substantially aluminum, incidental elements and impurities, the product having at least 5% improvement over 2024 alloy in fracture toughness, fatigue crack growth rate, corrosion resistance, and formability properties.

Abstract: The invention relates to a cylinder liner, cast into a reciprocating piston engine, of a highly hypereutectic aluminum/silicon alloy which is free of hard material particles independent of the melt and has such a composition that fine primary silicon crystals and intermetallic phases automatically form from the melt as hard particles. By spray-compacting, a blank of finely sprayed melt droplets is caused to grow, a fine distribution of the hard particles being produced by controlled introduction of small melt droplets. The blank can be transformed by an extrusion step into a form approximating the cylinder liner. After subsequent premachining with chip removal, the running surface is precision-machined and subsequently honed in at least one stage, after which the hard particles located in the running surface are exposed, plateau faces of the particles being formed, which faces protrude from the remaining surface of the matrix structure of the alloy.

Abstract: A method of producing an aluminum product having high formability high fracture toughness, high strength and improved corrosion resistance, the method comprising: (a) providing stock including an aluminum base alloy consisting essentially of about 0.7 to 1.0 wt. % silicon, not more than about 0.3 wt. % iron, not more than about 0.5 wt. % copper, about 0.8 to 1.1 wt. % magnesium, about 0.3 to 0.4 wt. % manganese, and about 0.5 to 0.8 wt. % zinc, the remainder substantially aluminum, incidental elements and impurities; (b) homogenizing the stock at a temperature ranging from about 950.degree. to 1050.degree. F. for a time period ranging from about 2 to 20 hours; (c) hot rolling at a temperature ranging from about 750.degree. to 950.degree. F. will increase; (d) solution heat treating at a temperature ranging from about 1000.degree. to 1080.degree. F. for a time period ranging from about 5 minutes to one hour; (e) cooling by quenching at a rate of about 1000.degree. F./second to a temperature of 100.degree. F.

Abstract: There is claimed a forged structural member suitable for aerospace applications and having improved combinations of strength and toughness. The member is made from a substantially vanadium-free, lithium-free aluminum-based alloy consisting essentially of: about 4.85-5.3 wt. % copper, about 0.5-1.0 wt. % magnesium, about 0.4-0.8 wt. % manganese, about 0.2-0.8 wt. % silver, about 0.05-0.25 wt. % zirconium, up to about 0.1 wt. % silicon, and up to about 0.1 wt. % iron, the balance aluminum, incidental elements and impurities, the Cu:Mg ratio of said alloy being between about 5 and 9, and more preferably between about 6.0 and 7.5. The invention exhibits a typical longitudinal tensile yield strength of about 71 ksi or higher at room temperature and can be forged into aircraft wheels or various brake and other product forms.

Abstract: There is claimed a lower wing structure for a commercial jet aircraft which includes a substantially unrecrystallized rolled plate member made from an aluminum alloy consisting essentially of about 3.6 to 4.0 wt. % copper, about 1.0 to 1.6 wt. % magnesium, about 0.3 to 0.7 wt. % manganese, about 0.05 to 0.25 wt. % zirconium, the balance aluminum and incidental elements and impurities. On a preferred basis, the alloy products of this invention include very low levels of both iron and silicon, typically on the order of less than 0.1 wt. % each, and more preferably about 0.05 wt. % or less iron and about 0.03 wt. % or less silicon. This alloy composition may be rolled to form lower wing skin plates and extruded or rolled to form wing box stringers therefrom.

Abstract: An aluminium alloy in extruded form, consisting of in weight %:______________________________________ Si 11.0-13.5 Mg 0.5-2.0 Fe not more than 1.0 Cu not more than 0.35 Zr not more than 0.1 Ni not more than 0.1 Cr not more than 0.1 Zn ot more thane 0.1 Sr 0.02-0.1 Mn not more than 1.2 Bi not more than 1.0 Pb not more than 1.0 Sn not more than 1.0 ______________________________________balance Al and unavoidable impurities. This alloy has high wear resistance, good corrosion resistance and good machinability. It is particularly suitable for shaped articles used at below 150.degree. C.

Abstract: An improved aluminum alloy containing specific additions of silicon and copper to improve wear resistance and improve solutionizing of the alloying constituents, and a process for forming a wear-resistant component from the alloy. The improved aluminum alloy is also characterized by good strength and sufficient ductility so as to permit forging of a wear-resistant component from the alloy. A preferred composition for the alloy, in weight percent, is about 13.0 to about 15.5 percent silicon; about 0.8 to about 2.0 percent copper; about 0.8 to about 1.3 percent magnesium, and the balance being aluminum and impurities. The aluminum alloy is particularly well suited to form pistons of the type used in compressors of automotive air conditioning systems.

Abstract: A process for making an essentially lead-free screw machine stock alloy, comprising the steps of providing a cast aluminum ingot having a composition consisting essentially of about 0.55 to 0.70 wt. % silicon, about 0.15 to 0.45 wt. % iron, about 0.30 to 0.40 wt. % copper, about 0.8 to 0.15 wt. % manganese, about 0.80 to 1.10 wt. % magnesium, about 0.08 to 0.14 wt. % chromium, nor more than about 0.25 wt. % zinc, about 0.007 to 0.07 wt. % titanium, about 0.20 to 0.8 wt. % bismuth, about 0.15 to 0.25 wt. % tin, balance aluminum and unavoidable impurities; homogenizing the alloy at a temperature ranging from about 900.degree. to 1060.degree. F. for a time period of at least 1 hour; cooling to room temperature; cutting the ingot into billets; heating and extruding the billets into a desired shape; and thermomechanically treating the extruded alloy shape.

Abstract: There is claimed a sheet or plate structural member suitable for aerospace applications and having improved combinations of strength and toughness. The member is made from a substantially vanadium-free, lithium-free, aluminum-based alloy consisting essentially of: about 4.85-5.3 wt. % copper, about 0.5-1.0 wt. % magnesium, about 0.4-0.8 wt. % manganese, about 0.2-0.8 wt. % silver, about 0.05-0.25 wt. % zirconium, up to about 0.1 wt. % silicon, and up to about 0.1 wt. % iron, the balance aluminum, incidental elements and impurities, the Cu:Mg ratio of said alloy being between about 5 and 9, and more preferably between about 6.0 and 7.5. The invention exhibits a typical tensile yield strength of about 77 ksi or higher at room temperature and can be processed into various lower wing members or into the fuselage skin of high speed aircraft.

Abstract: A metal sheet with a total thickness>0.5 mm comprising an AlCuMg aluminum alloy consisting essentially of Al and, in percent by weight:3.5<Cu<5.01.0<Mg<2.0Si<0.25Fe<0.25Mn<0.55all other elements: <0.25with0<Mn-2Fe<0.2,optionally plated with another aluminum alloy with the thickness of the plating being no more than 12% of the total thickness of the sheet, the sheet having a recrystallization rate>50% at all points and a deviation in recrystallization rate between surface and mid-thickness<35%, the sheet having in the quenched and stretched state or in the quenched, stretched and annealed state, a deflection after machining to mid-thickness of a bar resting on two distant supports with a length l such that:fe<0.14 1.sup.2,where f is the deflection expressed in micrometers, e being the thickness of the sheet in mm and l is the length of the bar in mm.

Abstract: An alloy suitable for manufacturing components out of a hollow body by high internal pressure forming contains, in wt. %,______________________________________ Silicon 0.3 to 1.6 Magnesium 0.3 to 1.3 Iron max. 0.5 Copper max. 0.9 Manganese max. 0.5 Vanadium 0.05 to 0.3 Cobalt max. 0.3 Chromium max. 0.3 Nickel max.0.8 Zirconium max. 0.3 ______________________________________and other alloying elements, individually at most 0.05, in total at most 0.15, the remainder aluminum.

Abstract: There is provided Al alloys which have improved and excellent fracture toughness and fatigue characteristic and improved formability, and which can be suitably used for transportation machines, such as aircraft, railway vehicles, general mechanical parts and the like. The Al alloy contains 1 to 8% (% by weight, the same is true for the following) of Cu, containing one or more selected from a group comprising 0.4 to 0.8% of Mn, 0.15 to 0.3% of Cr, 0.05 to 0.1% of Zr and 0.1 to 2.5% of Mg, Fe and Si each being less than 0.1%, a distance between constituents being more than 85 .mu.m, and having a micro-structure fulfilling at least one of the following (a) to (c):(a) the size of Al--Mn dispersoids is 4000 .ANG. or more,(b) the size of Al--Cr dispersoids is 1000 .ANG. or more, and(c) the size of Al--Zr dispersoids is 300 .ANG. or more.

Abstract: A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from aluminum alloy workpieces during heat treatment in furnaces with ambient and/or moisture-laden atmospheres. The method includes exposing the surface of the workpieces to an acidified inorganic salt solution or dispersion, with the inorganic salt of the solution containing a transition metal cation and a sulfate, phosphate or nitrate anion, before being subjected to the heat treatment. The workpieces are next subjected to the heat treatment, and the acidified transition metal sulfate, phosphate or nitrate salt is used to substantially decrease the amount of atomic hydrogen entering the respective bulks of the workpiece during heat treatment and to facilitate removal of atomic and molecular hydrogen from the bulks of the workpieces.

Abstract: An aluminum alloy containing magnesium (Mg) between 3.0 and 4.0 wt. %, manganese (Mn) between 0.5 and 1.0 wt. %, copper (Cu) between 0.2 and 0.6 wt. %, iron (Fe) between 0.05 and 0.4 wt. % and remaining obligatory trace elements, has an electrical conductivity after baking of 30 to 32% IACS, a yield strength of 320 MPa or more and a ratio of decrease in buckling strength after retort-treatment to that immediately after manufacturing the can end of less than 10%. This an aluminum alloy sheet for can ends has an excellent corrosion resistance, complete lack of stress corrosion cracking, or age softening resistance, maintains the a high buckling strength obtained subsequent to the manufacture of a can, even after retort treatment and storage at room temperature. The aluminum alloy sheet of this invention is particularly suitable for use as a can end for non-carbonated beverages and has the potential for even thinner aluminum alloy sheet formation.