New heat treatable aluminum alloys having magnesium and zinc are disclosed. The new aluminum alloys generally contain 3.0-6.0 wt. % Mg, 2.5-5.0 wt. % Zn, where (wt. % Mg)/(wt. % Zn) is from 0.60 to 2.40.

A method for producing an engine component, more particularly a piston for an internal combustion engine, in which an aluminium alloy is cast using the gravity die casting method is provided. The aluminium alloy comprises: 9 to 10.5% by weight silicon, >2.0 to <3.5% by weight nickel, >3.7 to 5.2% by weight copper, <1% by weight cobalt, 0.5 to 1.5% by weight magnesium, 0.1 to 0.7% by weight iron, 0.1 to 0.4% by weight manganese, >0.1 to <0.2% by weight zirconium, >0.1 to <0.2% by weight vanadium, 0.05 to <0.2% by weight titanium, 0.004 to 0.008% by weight phosphorus, with aluminium and unavoidable impurities constituting the rest. An engine component, in particular a piston, wherein the engine component consists, at least partially, of the aluminium alloy, and the use of an aluminium alloy to produce the engine component, is also provided.

The application relates to a cast aluminum alloy, to a method for producing an engine component, in particular a piston for an internal combustion engine, wherein a cast aluminum alloy is cast in the gravity permanent-mold casting method, to an engine component, in particular a piston for an internal combustion engine, at least partially consisting of a cast aluminum alloy, and to the use of a cast aluminum alloy to produce an engine component, in particular a piston for an internal combustion engine. The cast aluminum alloy consists of the following alloying elements: silicon: 9.0 wt % to<10.5 wt %, nickel: 0.8 wt % to<1.9 wt %, copper: 1.8 wt % to<3.6 wt %, magnesium: 0.5 wt % to 1.8 wt %, iron: 0.9 wt % to<1.4 wt %, zirconium and/or vanadium: in each case, 0.05 to<=0.3 or 0.2%, respectively, manganese: up to<=0.4 wt %, titanium: up to<=0.15 wt %, phosphorus: up to<=0.05 wt %, and aluminum and unavoidable impurities as the remainder.

Formable magnesium based wrought alloys include a magnesium based wrought alloy consisting essentially of (wt %): 0.1 to 2.0 of Zn; 0.05 to 1.5 of Ca; 0.1 to 1.0 of Zr; 0 to 1.3 of a rare earth element or mixture of the same of which includes Gd or Y; 0 to 0.3 of Sr, Al: 0 to 0.7; the balance of Mg and other unavoidable impurities.

An aluminum alloy for die casting. The aluminum alloy for die casting of the present disclosure includes, by wt %, 3Si10, 3Mg10, 0.01Fe1.3, 0.01Zn2, 0.01Cu1.5, 0.01Mn0.5, 0.05Ti0.15, 0.01La2, 0.01Sr2, a balance of Al, and unavoidable impurities.

A method for casting a cast part according to the tilt pouring principle includes pouring a molten metal from at least one tiltable casting vessel into a casting mold including a mold cavity which forms the cast part. The molten metal is ladled directly out of a bale-out furnace using the casting vessel, and a metal oxide skin forms in the casting vessel on the surface of the molten metal. The casting vessel containing the molten metal and the metal oxide skin floating thereon is brought to the casting mold. The molten metal is poured from the casting vessel into the casting mold by a common rotation of the casting vessel and casting mold about an axis of rotation. The metal oxide skin rises to the top of the molten metal during the pouring process, floating predominantly on top and on the surface of the molten metal.

Embodiments of surface-hardened aluminum-rare earth alloys and methods of making the alloys are disclosed. In some embodiments, the alloy comprises aluminum and 4 wt % to 60 wt % of a rare earth component X having a maximum solid solubility of 0.5 wt % in aluminum. The surface-hardened alloy component has an alloy bulk portion and a hardened alloy surface portion. At least a portion of the hardened alloy surface portion has a Vickers hardness that is at least 30% greater than a Vickers hardness of the alloy bulk portion.

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.

A method of heat treating high pressure die cast objects using pressure is disclosed. A high pressure die cast object is obtained and solution heat treated to above 700 F. for at least 2 hours at pressures between 0.5 and 35 KSI or at any pressure or range of pressures therebetween. This method of solution heat treatment with pressure reduces and/or eliminates blistered defects on the high pressure die cast object. The method of heat treating by solution heat treatment with pressure also allows an increase of yield strength and corresponding weight reduction upon redesign or substantially larger safety factors for the cast object.

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.