A ducted heat exchanger system for a gas turbine engine includes an additive manufactured heat exchanger core with a contoured external and/or internal geometry. A method of additively manufacturing a heat exchanger for a gas turbine engine includes additively manufacturing a core of a heat exchanger to set a ratio of local surface area to flow area to control a pressure drop per unit length along the core.

One embodiment of the present invention provides a polymeric ammunition having a metal injection molded primer insert.

One embodiment of the present invention provides a polymeric ammunition having a metal injection molded primer insert.

Provided are an article and a method of forming an article. The method includes providing a metallic powder, heating the metallic powder to a temperature sufficient to joint at least a portion of the metallic powder to form an initial layer, sequentially forming additional layers in a build direction by providing a distributed layer of the metallic powder over the initial layer and heating the distributed layer of the metallic powder, repeating the steps of sequentially forming the additional layers in the build direction to form a portion of the article having a hollow space formed in the build direction, and forming an overhang feature extending into the hollow space. The article includes an article formed by the method described herein.

A mold part of a modular concrete block mold has an additively manufactured region or is an additively manufactured mold part. The additively manufactured region may be a 3D metal printing region or the additively manufactured mold part may be a 3D metal printing mold part. The mold part may have a milled or cast region and the additively manufactured region.

A method can include blending materials to form a blend where the materials include a first particulate material and a second particulate material and where the first particulate material is water reactive and includes aluminum and one or more metals selected from a group consisting of metals, alkaline earth metals, group 12 transition metals, and basic having an atomic number equal to or greater than 31; and forming a degradable object from the blend.

In a method for producing a material sheet, in particular a metallic material sheet, a green body containing solid-state particles is sintered at a sintering temperature by heating the green body during sintering at least partly using microwave energy in accordance with a defined temperature profile having a heating phase and an essentially isothermal hold phase. A temperature of the green body is ascertained contactlessly with a sensor, and a supply of heat energy is controlled as a function of the temperature of the green body. During the heating phase an average microwave power is supplied and during the hold phase another average microwave power is supplied which is less than the one average microwave power.

Piece comprising a first metal part and a second part in organic matrix composite material, wherein the first part has a first connecting portion and the second part has a second connecting portion, the second connecting portion having at least one through-hole, the second connecting portion being totally or partially sandwiched between the first connecting portion and a metal fastening element, the fastening element being fastened on the first part both onto the first connecting portion via the through-hole of the second connecting portion and onto a portion other than the first connecting portion, whereby the first part and the second part are fastened to each other.

In a method of manufacturing open-cell bodies, individual parts of an open pore plastic in a size which corresponds to the size of the bodies to be manufactured while taking account of the shrinkage on a sintering or an open pore plastic element having predetermined break points which take account of the size and geometrical design of bodies to be manufactured are/is in filtrated and coated with a suspension in which at least one powdery material is contained. Organic components are expelled after a first heat treatment. Subsequently, a sintering is carried out. Parts of porous plastic provided with the suspension are separated before the first heat treatment or wherein, afterwards the open-cell element which is obtained from the plastic element from the material with which the bodies are formed is cut by forces and thereby separated bodies can be obtained.

An assembly can include a first radial compressor wheel that has a rotational axis and that includes a hub surface; a second radial compressor wheel that comprises a hub surface; and an annular baffle disposed at least in part between the hub surfaces wherein the annular baffle an outer edge and a substantially parabolic portion that extends to a tip portion, where the tip portion includes opposing sides that converge radially inwardly to a blunt end.