A method of forming a component having an internal passage defined therein is provided. The method includes positioning a jacketed core with respect to a mold. The jacketed core includes a hollow structure formed at least partially by an additive manufacturing process, and an inner core disposed within the hollow structure. The method also includes introducing a component material in a molten state into a cavity of the mold, and cooling the component material in the cavity to form the component. The inner core is positioned to define the internal passage within the component.

A method of forming a component having an internal passage defined therein is provided. The method includes positioning a jacketed core with respect to a mold. The jacketed core includes a hollow structure formed at least partially by an additive manufacturing process, and an inner core disposed within the hollow structure. The method also includes introducing a component material in a molten state into a cavity of the mold, and cooling the component material in the cavity to form the component. The inner core is positioned to define the internal passage within the component.

Embodiments of a methods for producing gas turbine engine rotors and other powdered metal articles having shaped internal cavities are provided. In one embodiment, the method includes consolidating a powdered metal body utilizing a hot isostatic pressing process to produce a rotor preform in which elongated sacrificial tubes are embedded. Acid or another solvent is directed into solvent inlet channels provided in the elongated sacrificial tubes to chemically dissolving the elongated sacrificial tubes and create shaped cavities within the rotor preform. The rotor preform is subject to further processing, such as machining, prior to or after chemical dissolution of the elongated sacrificial tubes to produce the completed gas turbine engine rotor.

A duct for a turbine engine, such as a gas turbine engine, can be utilized to carry a fluid from one portion of the engine to another. The duct can include a metallic tubular element having one of a varying wall thickness, a varying cross section, or a tight bend. Such a duct can be formed utilizing additive manufacturing or metal deposition on an additively manufactured mandrel.

A duct for a turbine engine, such as a gas turbine engine, can be utilized to carry a fluid from one portion of the engine to another. The duct can include a metallic tubular element having one of a varying wall thickness, a varying cross section, or a tight bend. Such a duct can be formed utilizing additive manufacturing or metal deposition on an additively manufactured mandrel.

A method of forming an article including: contacting a fugitive tool with a powdered parent material; densifying the powdered material; and destructively removing the fugitive tool. A coating of a different material may be formed against the parent material using a similar approach.

Build plates for additive manufacturing systems are disclosed. The build plates of the additive manufacturing systems may include a body including a build surface, and a bottom surface positioned opposite the build surface. The build plates may also include a first conduit formed through the body and extending between the build surface and the bottom surface. The first conduit may be configured to be in fluid communication with a first aperture formed through a surface of a first component that may be built on the build surface of the body of the build plates.

According to one embodiment of this disclosure a core includes a first end and a second end spaced generally opposite from the first end. The core further includes a stacking axis defined between the first end and second end and a first toroidal structure located between the first end and the second end. The first toroidal structure includes a first passage extending through the first toroidal structure in a first direction that is perpendicular to and passes through the stacking axis. The core also includes a second toroidal structure located between the first toroidal structure and the second end. The second toroidal structure includes a second passage extending through the second toroidal structure in a second direction. The first direction and the second direction are oriented along the stacking axis at a non-zero degree angle with respect to each other.

Methods for manufacturing an endovascular stent having channel(s) formed therein for containing a therapeutic material. A molding and sintering process forms a thin-walled tubular component having a tubular core structure encapsulated therein. Portions of the thin-walled tubular component are removed to form at least a portion of the endovascular stent in a pattern corresponding to that of the tubular core structure such that the tubular core structure or corresponding channel(s) left thereby are captured within a wall of the formed stent. The tubular core structure is removed to leave a corresponding channel(s) in its stead. A plurality of holes is formed in the stent wall for filling the stent channel(s) with the therapeutic material and for eluting the therapeutic material therefrom.

A method for manufacturing hard-metal pressed articles includes providing a die that forms a cavity for producing a pressed article with at least one cutting edge and at least one chip breaker groove that is associated with a chip space. The step of providing the die providing a movable mold part and a movable mold body. The mold part has an operative surface, wherein the mold part at least sectionally defines the shape of a pressed article with the operative surface, and wherein the mold part is feedable in a first feed direction. The mold body has a rod-shaped operative section for producing a through-hole in the pressed article, wherein the mold body is feedable in a second feed direction. The first feed direction and the second feed direction are inclined at an angle of at least 45? to each other. The pressed article is formed from a hard-metal powder that is introduced into the cavity and compressed there in at least one main pressing direction. Forming the pressed article comprises feeding the mold part and the mold body such that the mold body is positioned in the cavity with the operative section being disposed in an abutment area on the mold part in a powder-tight relative position. A device enables the manufacture of hard-metal pressed articles.