Abstract: Disclosed is an improved aluminum base alloy comprising an improved aluminum base alloy comprising 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0 to 1.2 wt. % Cu, 0 to 1.1 wt. % Mn, 0.01 to 0.4 wt. % Cr, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.1 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities. Also disclosed are methods of casting and thermomechanical processing of the alloy.

Abstract: A method of making a pressurized gas cylinder comprises providing an ingot of composition (in wt %); Zn 5.0-7.0; Mg 1.5-3.0; Cu 1.0-2.7; recrystallization inhibitor 0.05-0.40; Fe up to 0.30; Si up to 0.15; other impurities up to 0.05 each and 0.15 in total, balance Al of at least commercial purity, if necessary homogenizing the ingot at a temperature of at least 470.degree. C. and for a time sufficient to reduce the volume fraction of S phase to a value below 1.0%, extruding the ingot preferably by cold backward extrusion, and forming and over-aging the resulting pressurized gas cylinder.

Abstract: An essentially lead-free aluminum alloy is provided for extruded screw machine stock. The alloy consists essentially of from about 4.5% to about 6% copper, a maximum of about 0.4% silicon, a maximum of about 0.7% iron, not more than about 0.3% zinc, from about 0.1% to about 1% bismuth, from about 0.1% to about 0.5% tin, balance aluminum and unavoidable impurities. The screw machine stock is prepared by extruding a homogenized billet to the desired shape, then the shape is subjected to a thermomechanical treatment involving at least one heat-treatment and cold working.

Abstract: A process for casting, thermally transforming and semi-solid forming an aluminum base alloy into an article, the process comprising the steps of: casting a molten body of aluminum base alloy comprising 2 to 7 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.3 to 3 wt. % Cu, 0.05 to 0.4 wt. % Fe, and at least one of the group consisting of 0.01 to 1 wt. % Mn, 0.01 to 0.35 wt. % Cr, max. 0.2 wt. % Ti, max. 0.3 wt. % V to provide a solidified body, the molten aluminum base alloy being solidified at a rate between liquidus and solidus temperatures of the aluminum base alloy to provide a solidified body having a dendritic microstructure. Thereafter, heat is applied to the solidified body to bring the body to a superheated temperature of 3.degree. to 50.degree. C. above the solidus temperature of the aluminum base alloy while maintaining the body in a solid shape and effecting thermal transformation of the body having the dendritic structure when the body is heated to above the solidus temperature.

Abstract: The starting material in a thixotropic forming process for the manufacture of road wheels, fitted ultimately with pneumatic tyres, is an ingot of rheocast metal alloy preheated to the semisolid state: the ingot is injected into a closed die affording a cavity in the shape of the wheel and equipped with independent thermoregulating circuits routed and controlled in such a way as to maintain the wider passages of the cavity at a temperature lower than that of the narrower passages; to ensure the die fills properly, the ingot is injected at a variable and controlled velocity, correlated both to the rate at which the alloy spreads through the cavity and to the geometry of the cavity itself, whereupon a pressure much higher than the injection force is applied to the solid-semisolid interface within the alloy, and sustained until full solidification is achieved.

Abstract: The invention concerns a process for the production of rolled or extruded products of high strength AlSiMgCu aluminium alloy with good intergranular corrosion resistance, comprising the following steps:casting a plate or billet with the following composition (by weight):Si: 0.7-1.3%Mg: 0.6-1.1%Cu: 0.5-1.1%Mn: 0.3-0.8%Zr: <0.20%Fe: <0.30%Zn: <1%Ag: <1%Cr: <0.25%other elements: <0.05% each and <0.15% in total remainder: aluminium; with: Mg/Si<1homogenising in the range 470.degree. C. to 570.degree. C.;hot working, and optionally cold working;solution heat treating in the range 540.degree. C. to 570.degree. C.;quenching;annealing, comprising at least one temperature plateau in the range 150.degree. C. to 250.degree. C., preferably in the range 165.degree. C. to 220.degree. C., the total period measured as the equivalent time at 175.degree. C. being in the range 30 h to 300 h.

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: A process for casting, thermally transforming and semi-solid forming an aluminum base alloy into an article, the process comprising the steps of: casting a molten body of aluminum base alloy comprising 2 to 5 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.3 to 1.2 wt. % Cu, 0.05 to 0.4 wt. % Fe, and at least one of the group consisting of 0.01 to 1 wt. % Mn, 0.01 to 0.35 wt. % Cr, max. 0.2 wt. % Ti, max. 0.3 wt. % V to provide a solidified body, the molten aluminum base alloy being solidified at a rate between liquidus and solidus temperatures of the aluminum base alloy to provide a solidified body having a dendritic microstructure. Thereafter, heat is applied to the solidified body to bring the body to a superheated temperature of 3.degree. to 50.degree. C. above the solidus temperature of the aluminum base alloy while maintaining the body in a solid shape and effecting thermal transformation of the body having the dendritic structure when the body is heated to above the solidus temperature.

Abstract: A method for manufacturing an aluminum alloy conductor for use at ultra low temperature which involves the steps of adding at least one of the metallic and semimetallic effective elements selected from the group consisting of B, Ca, Ce, Ga, Y, Yb and Th, in a total amount of 6 to 200 weight ppm, into a previously prepared molten high purity aluminum having a purity of not less than 99.98 wt % to thereby obtain a molten metal mixture; casting the molten metal mixture to thereby obtain a casting; subjecting the casting to extrusion working at 150.degree. C. to 350.degree. C. in an area reduction ratio of 1:10 to 1:150 whereby an extrusion worked product is formed; and annealing the extrusion worked product at a temperature of 250.degree. C. to 530.degree. C. for 3 to 120 minutes, whereby an aluminum alloy conductor for use at ultra low temperature is obtained.

Abstract: A temperature profile is determined of a metal sample for the metal to be converted to establish a temperature range indicative of a partially solid and partially liquid state of the metal. With this temperature profile, a metal preform is heated at a controlled rate from a temperature below the temperature range to a temperature within the range defined by the temperature profile to achieve a select percent by volume of liquid in the metal. This controlled heating to a desired temperature, which may be at a uniform rate, followed by holding at the desired temperature, thermally converts a dendritic structure of the material into a globular structure. The thermally converted metal preform is then recovered for subsequent use such as shaping into a desired article.

Abstract: A high-strength and high-toughness aluminum-based alloy having a composition represented by the general formula: Al.sub.a Ni.sub.b X.sub.c M.sub.d Q.sub.e, wherein X is at least one element selected from the group consisting of La, Ce, Mm, Ti and Zr; M is at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Y, Nb, Mo, Hf, Ta and W; Q is at least one element selected from the group consisting of Mg, Si, Cu and Zn; and a, b, c, d and e are, in atomic percentage, 83.ltoreq.a.ltoreq.94,3, 5.ltoreq.b.ltoreq.10, 0.5.ltoreq.c.ltoreq.3, 0.1.ltoreq.d.ltoreq.2, and 0.1.ltoreq.e.ltoreq.2. The aluminum-based alloy has a high strength and an excellent toughness and can maintain the excellent characteristics provided by a quench solidification process even when subjected to thermal influence at the time of working. In addition, it can provide an alloy material having a high specific strength by virtue of minimized amounts of elements having a high specific gravity to be added to the alloy.

Abstract: A magnesium or aluminum alloy melt having a composition within maximum solubility limits is poured into a mold at a temperature exceeding the alloy liquidus line, but not higher by more than 30.degree. C., the melt is cooled at a rate of at least 1.0.degree. C./sec to form a billet, the billet is heated at a rate of at least 0.5.degree. C./min in a range bound by the alloy solubility line and the alloy solidus line and further heated to a temperature above the alloy solidus line and is maintained at that temperature for 5 to 60 minutes, thereby spheroidizing primary crystals thereof, the billet is then further heated to a temperature below the alloy liquidus line and the semi-solid billet is shaped under pressure. Alternatively, a hypo-eutectic aluminum alloy melt having a composition at or above maximum solubility limits is poured into a billet-forming mold at a temperature exceeding the alloy liquidus line, but not higher by more than 30.degree. C. and the melt is cooled at a rate of at least 1.0.degree. C.

Abstract: Disclosed is an improved aluminum base alloy comprising an improved aluminum base alloy comprising 0.2 to 2 wt. % Si, 0.3 to 1.7 wt. % Mg, 0 to 1.2 wt. % Cu, 0 to 1.1 wt. % Mn, 0.01 to 0.4 wt. % Cr, and at least one of the elements selected from the group consisting of 0.01 to 0.3 wt. % V, 0.001 to 0.1 wt. % Be and 0.01 to 0.1 wt. % Sr, the remainder comprising aluminum, incidental elements and impurities. Also disclosed are methods of casting and thermomechanical processing of the alloy.

Abstract: A process for casting, thermally transforming and semi-solid forming an aluminum base alloy into an article, the process comprising the steps of: casting a molten body of aluminum base alloy to provide a solidified body, the molten aluminum base alloy being solidified at a rate between liquidus and solidus temperatures of the aluminum base alloy in a range of 5.degree. to 100.degree. C./sec. to provide an entire solidified body having a denditic microstructure. Thereafter, heat is applied to the solidified body to bring the body to a superheated temperature of 3.degree. to 50.degree. C. above the solidus temperature of the aluminum base alloy while maintaining a body in a solid shape and effecting thermal transformation of the body having the dendritic structure when the entire body is uniformly heated to the superheated temperature. The body having a non-dendritic structure is formed in a semi-solid condition into the article.

Abstract: AA 7000 series alloys having high mechanical strength and a process for obtaining them. The alloys contain, by weight, 7 to 13.5% Zn, 1 to 3.8% Mg, 0.6 to 2.7% Cu, 0 to 0.5% Mn, 0 to 0.4% Cr, 0 to 0.2% Zr, others up to 0.05% each and 0.15% total, and remainder Al. Either wrought or cast alloys can be obtained, and the specific energy associated with the DEA melting signal of the product is lower than 3 J/g.

Abstract: An A-rated aluminum alloy suitable for machining, said alloy consisting essentially of: about 0.15-1.0 wt. % copper, about 1.01-1.5 wt. % tin, about 0.65-1.35 wt. % magnesium, about 0.4-1.1 wt. % silicon, about 0.00 2-0.35 wt. % manganese, up to about 0.5 wt. % iron, up to about 0.15 wt. % chromium and up to about 0.15 wt. % titanium, the remainder substantially aluminum. On a preferred basis, this alloy contains about 0.51-0.75 wt. % copper, about 1.1-1.3 wt. % tin, about 0.7-0.9 wt. % magnesium and about 0.45-0.75 wt. % silicon. The alloy is substantially free of lead, bismuth, nickel, zirconium and cadmium. There is further disclosed an improved method for making screw machine stock or wire, rod and bar product from this alloy by casting, preheating, extruding, solution heat treating, cold finishing and thermally processing the aforementioned alloy composition.

Abstract: A composition and method for producing a low density, high stiffness aluminum alloy which is capable of being processed into structural components having a desired combination of tensile strength, fracture toughness and ductility. The method includes the steps of forming, by spray deposition, a solid Al-Li alloy workpiece consisting essentially of the formula Al.sub.bal Li.sub.a Zr.sub.b wherein "a" ranges from greater than about 2.5 to 7 wt %, and "b" ranges from greater than about 0.13 to 0.6 wt %, the balance being aluminum, said alloy having been solidified at a cooling rate of about 10.sup.2 to 10.sup.4 K/sec. The method further includes several variations of selected thermomechanical process steps for: (1) eliminating any residual porosity which may be present in the workpiece as a result of the spray deposition step; and (2) producing components for a wide range of applications.

Abstract: A process for producing an aluminum-based alloy composition having improved combinations of strength and fracture toughness. The process includes casting an ingot consisting essentially of 2.5-5.5 percent copper, 0.10-2.30 percent magnesium, with minor amounts of grain refining elements, dispersoid additions and impurities and the balance aluminum. The amounts of copper and magnesium are controlled such that the solid solubility limit for these elements in aluminum is not exceeded. The alloy composition also includes 0.10-1.00 percent silver for improved mechanical properties. The ingot, in accordance with the inventive process, is homogenized and worked to produce a product. The product is solution heat treated to obtain a saturated solid solution and then aged to develop an improved combination of high strength and fracture toughness.

Abstract: In a method of extruding a 6000-series-type aluminum alloy by casting, homogenizing, extruding and optionally, aging and/or heat treating, an alloy composition is provided having silicon 0.6-1.2 wt. %, magnesium 0.7-1.2 wt. %, copper 0.3-1.1 wt. %, manganese 0.1-0.8 wt. %, zirconium 0.05-0.25 wt. %, up to 0.5 wt. % iron, up to 0.15 wt. % chromium, up to 0.25 wt. % zinc, up to 0.10 wt. % titanium with the balance aluminum and incidental impurities wherein an effective amount of zirconium, in combination with effective amounts of manganese, produces a fibrous grain structure which contributes to a combination of high strength and fracture toughness in the extruded alloy. The fibrous grain structure also permits improvements in forming the extrusion by enabling lower temperatures to be utilized during the homogenization step.

Abstract: An aluminum alloy containing about 0.5 to 1.3% magnesium, about 0.4 to 1.2% silicon, about 0.6 to 1.2% copper, about 0.1 to 1% manganese, the balance substantially being aluminum along with impurities and incidental elements, is made into wrought wire, rod, bar or tube products by extrusion and cold working, preferably drawing, operations. The method includes extrusion within about 300.degree. or 400.degree. up to about 650.degree. or 700.degree. F. and even possibly up to 750.degree. or 800.degree. F. on a less preferred basis. Following extrusion, the product may be cold drawn either before or after, or both before and after, solution heat treatment and quenching. Rapid quenching is preferred. The product can then be artificially aged, for instance by heating to 375.degree. F. The resulting product has a fine grain size and consistent and good properties so as to be useful in a number of applications.

Abstract: The present invention provides a process comprising the steps of forming a cast amorphous alloy from an alloy which exhibits glass transition behavior, heating the amorphous alloy to a temperature between Tg and Tx while subjecting the alloy to drawing to obtain a wire and cooling the wire to (Tg-50 K) or lower. By this process, it is possible to produce an amorphous alloy wire at a low cost and provide an ultrafine wire having high strength and high corrosion resistance as well as flexibility. The amorphous alloy wire can be utilized as a reinforcing wire for a composite material, a variety of reinforcing members, a woven fabric and the like.

Abstract: An aluminum-based alloy composition having improved corrosion resistance and high extrudability consists essentially of about 0.1-0.5% by weight of manganese, about 0.05-0.12% by weight of silicon, about 0.10-0.20% by weight of titanium, about 0.15-0.25% by weight of iron and the balance aluminum, wherein the aluminum alloy is essentially copper free. The inventive alloy is useful in automotive applications, in particular, heat exchanger tubing and finstock, and foil packaging. The process provided by the invention uses a high extrusion ratio and produces a product having high corrosion resistance.

Abstract: A method is disclosed for the preparation of metal reference samples for spectrographic analysis. The method consists of producing a substantially cylindrical preform or blank by spray deposition, followed by the consolidation of the blank in the form of a bar having an appropriate diameter and finally the cutting of the reference samples therefrom. Compared with the prior art methods, the method offers the advantages of an improved chemical homogeneity and low oxygen content.

Abstract: A rapidly solidified, low density aluminum base alloy consists essentially of the formula Al.sub.bal Li.sub.a Cu.sub.b Mg.sub.c Zr.sub.d wherein "a" ranges from about 2.2 to 2.5 wt %, "b" ranges from about 0.8 to 1.2 wt %, "c" ranges from about 0.4 to 0.6 wt % and "d" ranges from about 0.4 to 0.8 wt %, the balance being aluminum plus incidental impurities. The alloy is especially suited to be consolidated to produce a strong, tough, low density aircraft landing wheel.

Abstract: The present invention provides a method for improving aluminum alloy plate product properties by delaying final stretching of the plate product. During processing of the product, a time interval or intentional delay is provided between the final cold rolling step and the final stretching step. By delaying the final stretching procedure, an aluminum alloy plate product is provided with an improved fracture toughness without significant decrease in strength values. The method of intentionally delaying final stretching is particularly adapted for 2000 series aluminum alloys.

Abstract: A compacted and consolidated aluminum-based alloy material is obtained by compacting and consolidating a rapidly-solidified material having a composition represented by the general formula: Al.sub.a Ni.sub.b X.sub.c M.sub.d or Al.sub.a' Ni.sub.b X.sub.c M.sub.d Q.sub.e, where X is one or two elements selected from La and Ce or an Mm; M is Zr or Ti; Q is one or more elements selected from Mg, Si, Cu and Zn, and a, a', b, c, d and e are, in atomic percentages, 84.ltoreq.a.ltoreq.94.8, 82.ltoreq.a'.ltoreq.94.6, 5.ltoreq.b .ltoreq.10, 0.1.ltoreq.c.ltoreq.3, 0.1.ltoreq.d.ltoreq.3, and 0.2.ltoreq.e.ltoreq.2. According to the production process of the invention, powder or flakes obtained by rapidly solidifying are compacted, followed by compressing, forming and consolidating by conventional plastic working operations. The consolidated material has an elongation sufficient to withstand secondary working operations. Moreover, the material retains the excellent properties of its raw material as they are.

Abstract: A method of producing a thixotropic material is provided which consists of deforming a fully solidified metal or metal alloy below its temperature of recrystallization by cold or warm working such as extrusion or rolling. The deformed material is then caused to recrystallize by heating and the temperature is either further raised or subsequently raised above the solidus of the material so that the recrystallized structure partially melts to provide discrete particles which spheroidize in the liquid matrix to provide a material which behaves thixotropically. The flow characteristics of the material are such that lower forming loads are required and weaker non-metallic die materials may be used.

Abstract: In a method for producing an aluminum alloy, for instance to make a billet or ingot for extrusion purposes, and which may consist of a structural hardening Al-Mg-Si-alloy, the production comprises the following steps:casting an ingot or billet,homogenizing the billet,cooling of the homogenized billet,reheating the billet to a temperature in the alloy above the solubility temperature in the precipitated phases in the Al matrix, for instance the solubility temperature for the Mg-Si-phases in a billet made of an Al-Mg-Si-alloy,holding the billet at the temperature above the solubility temperature for the precipitated phases in the Al matrix, for instance the Mg-Si-phases in a billet made of an Al-Mg-Si-alloy, until the phases are dissolved,quick cooling of the billet to the desired extrusion temperature to prevent new precipitation of said phases in the alloy structure, or that the billet is extruded at said solubility temperature.[., until the phases are dissolved.]..