Provided is an aluminum alloy material with high strength and low thermal expansion coefficient even under high temperature environments. An aluminum alloy material according to the present invention has a composition consisting of: Si: 13 mass % to 15 mass %, Cu: 2.0 mass % to 6.0 mass %, Mg: 0.2 mass % to 1.5 mass %, Fe: 0.4 mass % to 0.8 mass %, Ni: 0.2 mass % to 0.8 mass %, P: 0.005 mass % to 0.015 mass %, and the balance being Al and inevitable impurities.

An aluminum alloy casting excellent in high temperature strength and thermal conductivity, a method of producing the same, and an aluminum alloy piston for internal combustion engine using this casting. An aluminum alloy casting having a chemical composition comprising Si: 12.0 to 13.5 mass % Cu: 4.5 to 5.5 mass % Mg: 0.6 to 1.0 mass % Ni: 0.7 to 1.3 mass % Fe: 1.15 to 1.25 mass % Ti: 0.10 to 0.2 mass % P: 0.004 to 0.02 mass % and a balance of Al and unavoidable impurities, wherein
in an observed field of view of 0.2 mm.sup.2, the major axis length of the AlFeSi based crystallites is 100 m or less by average length of 10 crystallites from the largest down. The method for producing the casting comprising casting a melt of aluminum alloy having the above chemical composition at cooling rate of 100 C./sec or more, then performing aging treatment.

Provided are a method for preparing a microfluidic device, a microfluidic device and a microfluidic system. The method includes: providing a mold having a groove; injecting a liquid metal into the groove of the mold, and solidifying the liquid metal to obtain a solid metal; separating the solid metal from the mold; providing the solid metal with an electrode; providing a cladding layer on a surface of the solid metal provided with the electrode, such that the solid metal is wrapped by the cladding layer, and at least a part of the electrode extends outside the cladding layer, so as to obtain a preform; and fixing the preform in a substrate, melting the solid metal and extending at least a part of the electrode outside the substrate, to obtain the microfluidic device.

A process for manufacturing an aluminum alloy wheel includes: casting, de-flashing, soaking, spinning, thermal treatment, de-gating, X-ray and machining. During the casting, a casting mold is cooled with water, and a cast blank is produced from carrying out the casting. The de-flashing includes removing flashes of the cast blank at a rim of the cast blank with a de-flashing device. The soaking includes reheating on the cast blank that has been de-flashed. The spinning includes an adaptive spinning mold. The thermal treatment includes direct solution treatment and aging on the cast blank in a thermal treatment furnace after spinning.

An aluminum alloy consisting essentially of from greater than 6 wt % to about 12.5 wt % silicon; iron present in an amount up to 0.15 wt %; from about 0.1 wt % to about 0.4 wt % chromium; from about 0.1 wt % to about 3 wt % copper; from about 0.1 wt % to about 0.5 wt % magnesium; from about 0.05 wt % to about 0.1 wt % titanium; less than 0.01 wt % of strontium; and a balance of aluminum and inevitable impurities. The aluminum alloy contains no vanadium. A method for increasing ductility and strength of an aluminum alloy without using vacuum and a T7 heat treatment, the method comprising: casting the molten aluminum alloy by a high pressure die-cast process to form a cast structure. The structural castings formed of the aluminum alloy composition disclosed herein exhibit desirable mechanical properties, such as high strength and high ductility/elongation.

A method for producing a component from an aluminum alloy using a semisolid method is provided. The alloy contains less than 1.3% by weight of iron and no more than 0.2% by weight of silicon, and the component has sufficient ductility such that the component can be joined to other components by self-piercing riveting, flow drilling, high-speed tack setting, friction welding and/or weld riveting.

Systems and methods for making aluminum alloy products are described including those that decrease the tendency for hot tearing or shrinkage porosity to occur during casting by introducing forced convection during the casting process. The forced convection may result in formation of high circularity grains during the solidification process, thereby increasing the permeability of the liquid aluminum alloy and decreasing the tendency for hot tearing or shrinkage porosity to occur.

An aluminum alloy for casting into a component, such as a vehicle component, is provided. The aluminum alloy includes 2 to 5 wt. % silicon, which is a lower amount of silicon compared to other aluminum alloys used for casting. The aluminum alloy further includes 1.0 to 2.0 wt. % zinc, less than 0.5 wt. % iron, and not greater than 0.6 wt. % manganese, based on the total weight of the aluminum alloy. The aluminum alloy can further include 0.01 to 0.07 wt. % strontium, 0.05 to 0.6 wt. % magnesium, not greater than 0.2 wt. % titanium, and less than 0.02 wt. % copper, based on the total weight of the aluminum alloy. After the casting step, the cast aluminum alloy has a yield strength of at least 110 MPa, ultimate tensile strength (UTS) of 220 to 230 MPa, and an elongation of 10 to 20%.

The present invention relates to a preparation method of a lithium-containing magnesium/aluminum matrix composite. The preparation method is performed according to the following steps: (1) preparing magnesium ingots or aluminum ingots, preparing lithium metal, and preparing flux and reinforcements; (2) heating the flux to prepare flux melt, and adding the reinforcements to the flux melt to prepare a liquid-solid mixture; (3) pouring the liquid-solid mixture in a normal-temperature crucible, and performing cooling to obtain a precursor; (4) preheating a crucible, adding raw materials, and performing melting to form a raw material melt; (5) controlling a temperature of the raw material melt to 973-993K, adding the lithium metal, performing stirring, adding the precursor, performing stirring and mixing, raising temperature to 993-1013K, and performing standing; and (6) scumming operation should be carried out, and performing temperature casting on composite melt.

There is provided a method of producing a casing configured such that adjacent surfaces of the casing are maintained to be perpendicular to each other. A method of producing a casing includes: a first part forming step of forming a first part by pouring molten metal into a cavity formed inside a first die including a first die portion and a second die portion, the cavity corresponding to the first part, the first part including two plate portions connected to each other such that an angle between main surfaces of the two plate portions of the first part becomes 90, the two main surfaces of the two plate portions of the first part being formed by only one of the first die portion and the second die portion; and a second part forming step of forming a second part by pouring the molten metal into a cavity formed inside a second die including a third die portion and a fourth die portion, the cavity corresponding to the second part, the second part including two plate portions connected to each other such that an angle between main surfaces of the two plate portions of the second part becomes 90, the two main surfaces of the two plate portions of the second part being formed by only one of the third die portion and the fourth die portion.