A method and apparatus cast a material with nano-micro duplex grain structure. The apparatus includes module system, heating system casting mold and gating system, multiaxial compound motion system accompanied by the following technological characteristics; alloy smelting; after heat preservation, alloy melt is poured into the casting mold which is put into the centrifugal barrel of the six-axis motion system; then the casting mold carries out composite motion and the alloy melt starts solidification; as a result, casting AlSi alloy block with multi-scale nano-structure includes nano-micro duplex grain group is prepared.

The present invention relates to a method of semi-solid indirect squeeze casting for Mg-based composite material, which aims at improving the mechanical property of the cast by adding magnesium zinc yttrium quasicrystal of high hardness, high elastic modulus and excellent matrix binding property acting as the reinforcement into the magnesium alloy matrix and manufacturing the cast through smelting using a vacuum atmosphere smelting furnace, agitating with ultrasonic wave assisted vibration in the rotating impeller jet agitation furnace and indirect squeeze casting against the problem of poor wettability, easy agglomeration, inhomogeneous distribution between the reinforcement particles and the matrix materials and poor properties of the manufactured cast. The manufacturing method of the present invention has advanced technologies and detailed and accurate data. The cast has excellent microstructure compactness, no shrinkage cavities and shrinkage defects and the primary phase in the metallographic structure consists of spherical and near-spherical crystalline grains, wherein dendritic crystalline grains almost disappear and the size of the crystalline grain is obviously refined. The tensile strength of the Mg-based composite material cast reaches to 225 Mpa, the elongation rate thereof reaches to 6.5% and the hardness thereof reaches to 86 HV. So the manufacturing method of the present invention is an advanced semi-solid indirect squeeze casting method for the Mg-based composite material.

A castable, moldable, or extrudable magnesium-based alloy that includes one or more insoluble additives. The insoluble additives can be used to enhance the mechanical properties of the structure, such as ductility and/or tensile strength. The final structure can be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final structure as compared to the non-enhanced structure. The magnesium-based composite has improved thermal and mechanical properties by the modification of grain boundary properties through the addition of insoluble nanoparticles to the magnesium alloys. The magnesium-based composite can have a thermal conductivity that is greater than 180 W/m-K, and/or ductility exceeding 15-20% elongation to failure.

A method for die casting a metal alloy in a cavity, implementing a mold comprising an induction heater to heat the molding surfaces of the cavity. The cavity is filled with the metal alloy by injection and preheated to a nominal preheating temperature T1. The metal in the cavity is solidified. The mold is opened and the part is ejected therefrom. The molding surfaces of the cavity are heated by induction while the part is no longer in contact with said surfaces. The molding surfaces of the cavity are sprayed, the mold being opened, by a release agent. The mold is closed and the cavity is heated the temperature T1.

Described herein are additive manufacturing methods and products made using such methods. The alloy compositions described herein are specifically selected for the additive manufacturing methods and provide products that exhibit superior mechanical properties as compared to their cast counterparts. Using the compositions and methods described herein, products that do not exhibit substantial coarsening, such as at elevated temperatures, can be obtained. The products further exhibit uniform microstructures along the print axis, thus contributing to improved strength and performance. Additives also can be used in the alloys described herein.

The invention is directed to the interventionless activation of wellbore devices using dissolving and/or degrading and/or expanding structural materials. Engineered response materials, such as those that dissolve and/or degrade or expand upon exposure to specific environment, can be used to centralize a device in a wellbore.

The present invention provides an aluminum-diamond composite which combines high thermal conductivity and a coefficient of thermal expansion close to a semiconductor element, and in which the difference between the thicknesses of both surfaces is reduced so as to be suitable for use as a heat sink etc. for a semiconductor element. Provided is a flat plate-shaped aluminum-diamond composite that has an aluminum-diamond composite part and a surface layer that coats both surfaces of the composite part and includes a metal that has aluminum as a principal component, wherein: the composite part is composed of a composite material that is composed of an aluminum or aluminum alloy matrix and diamond particles dispersed in said matrix; the composite material is composed of a diamond powder in which diamond particles having a particle size of 1-20 m, inclusive, make up 10-40 vol % of the diamond particles and diamond particles having a particle size of 100-250 m, inclusive, make up 50-80 vol %, said powder not containing diamond particles having a particle size of less than 1 m or diamond particles having a particle size of more than 250 m; and the average value for the differences in in-plane thickness per 50 mm50 mm is 100 m or less.

The invention provides magnesium alloys for high temperature applications that combine excellent castability with superior corrosion resistance, and with good creep resistance, ductility, impact strength, and thermal conductivity. The alloys contain mainly Al, La, Ce, and Mn, and are particularly useful for high-pressure die casting process.

A high fatigue strength aluminum alloy comprises in weight percent copper 3.0-3.5%, iron 0-1.3%, magnesium 0.24-0.35%, manganese 0-0.8%, silicon 6.5-12.0%, strontium 0-0.025%, titanium 0.05-0.2%, vanadium 0.20-0.35%, zinc 0-3.0%, zirconium 0.2-0.4%, a maximum of 0.5% other elements and balance aluminum plus impurities. The alloy defines a microstructure having an aluminum matrix with the Zr and the V in solid solution after solidification. The matrix has solid solution Zr of at least 0.16% after heat treatment and solid solution V of at least 0.20% after heat treatment, and both Cu and Mg are dissolved into the aluminum matrix during the heat treatment and subsequently precipitated during the heat treatment. A process for heat treating an AlSiCuMgFeZnMnSr-TMs alloy comprises heat treating the alloy to produce a microstructure having a matrix with Zr and V in solid solution after solidification.

The invention relates to a battery electrode foil comprising an aluminium alloy, wherein the aluminium alloy has the following composition in weight percent: Si: 0.07-0.12% by weight, Fe: 0.18-0.24% by weight, Cu: 0.03-0.08% by weight, Mn: 0.015-0.025% by weight, Zn: 0.01% by weight, Ti: 0.015-0.025% by weight, Zn: 0.01% by weight, Ti: 0.015-0.025% by weight, Mn: 0.015-0.025% by weight, Zn: 0.01% by weight, Ti: 0.015-0.025% by weight, wherein the aluminium alloy can contain impurities up to a maximum of 0.01% in each case, up to a maximum of 0.03% in total, but the proportion of aluminium must be at least 99.5% by weight; wherein the battery electrode foil has intermetallic phases of a diameter length of 0.1 to 1.0 m with a density of 9500 particles/mm.sup.2. The invention further relates to a process for the production of a battery electrode foil, its use for the production of accumulators, and accumulators containing the battery electrode foil.