There is provided a hollow composite magnetic member obtained by partially reforming a hollow member which is formed of a ferromagnetic material containing Cr of 15 mass % or more and 18 mass % or less, in which the reformed portion includes an alloy containing Cr of 8 mass % or more and 18 mass % and Ni of 6.5 mass % or more and 50 mass % or less. Accordingly, a hollow composite magnetic member having a small width of the nonmagnetic portion and a fuel injection valve having the same can be provided.

A process includes forming a printed article having an external surface and at least one microfeature with an internal surface by additive manufacture, coating the external surface and the internal surface of the printed article with a metallic microlayer to form a coated article, and densifying the coated article to form a component. After formation, the printed article has a porosity such that the printed article is not at full density. A densified component includes a printed article having an external surface and at least one microfeature with an internal surface and a metallic microlayer coating the external surface and the internal surface of the printed article. The printed article is formed by additive manufacture.

A heat exchanger includes a core comprising a single piece continuous boundary having a first surface defining a first labyrinth, and an opposing second surface defining a second labyrinth; a first inlet manifold connected to the first labyrinth and configured to supply a first fluid to the first labyrinth; and a second inlet manifold connected to the second labyrinth and configured to supply a second fluid to the second labyrinth; wherein the core comprises a plurality of identical three dimensional unit cell structures replicated in three orthogonal spatial dimensions.

An additive manufacturing system utilizing an epitaxy process, and method of manufacture, utilizes a heating source and a cooling source to control thermal gradients and a solidification rate of each slice of a workpiece manufactured from a seed having a directional grain microstructure. An energy gun is utilized to melt selected regions of each successive layer of a plurality layers of a powder in a powder bed to successively form each solidified slice of the workpiece.

A feed-through component for a conductor feed-through which passes through a part of a housing, for example a battery housing, is embedded in a glass or glass ceramic material and has at least one conductor, for example an essentially pin-shaped conductor, and a head part. The surface, in particular the cross-sectional surface, of the head part is greater than the surface, in particular the cross-sectional surface, of the conductor, for example of the essentially pin-shaped conductor. The head part is embodied such that is can be joined to an electrode-connecting component, for example an electrode-connecting part, which may be made of copper, a copper alloy CuSiC, an aluminum alloy AlSiC or aluminum, with a mechanically stable and non-detachable connection.

A laser welding method includes preliminarily heating an entire welding path by irradiating the entire welding path with a heating laser beam for a first predetermined time, the welding path being closed loop-shaped and formed at a boundary between two workpieces as welding objects, and performing scanning with a welding laser beam along the welding path while continuously performing the irradiation with the heating laser beam after the preliminary heating and terminating the irradiation with the welding laser beam after the welding laser beam goes around the welding path.

A method includes providing a metallic first powder having a plurality of first particles with a first mean particle diameter. A second powder added to the first powder has a plurality of second particles with a second mean particle diameter less than the first mean particle diameter. Energy is applied to at least the second powder so as to selectively heat the second particles. The first powder is combined with the heated second powder to form a modified powder including modified powder particles. Modified powder particles have an interior portion containing an interior composition, and an outer surface portion with an outer composition different from the interior composition.

A part formed using an metal additive manufacturing process such as a turbine airfoil with an oversized feature such as an oversized hole, where the oversized hole is filled with a preform having a shape of a normal sized hole and secured within the part using a braze or weld material, and where the preform is removed to leave within the part the normal sized hole. The preform is made of a refractory material that can be removed from the part by exposure to oxygen.

A glass, for example a glass solder, includes the following components in mole percent (mol-%): P.sub.2O.sub.5 37-50 mol-%, for example 39-48 mol-%; Al.sub.2O.sub.3 0-14 mol-%, for example 2-12 mol-%; B.sub.2O.sub.3 2-10 mol-%, for example 4-8 mol-%; Na.sub.2O 0-30 mol-%, for example 0-20 mol-%; M.sub.2O 0-20 mol-%, for example 12-20 mol-%, wherein M is, for example, K, Cs or Rb; Li.sub.2O 0-42 mol-%, for example 0-40 mol-% or 17-40 mol-%; BaO 0-20 mol-%, for example 0-20 mol-% or 5-20 mol-%; and Bi.sub.2O.sub.3 0-10 mol-%, for example 1-5 mol-% or 2-5 mol-%.

A method is provided for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article. The method includes: providing at least one electron beam source emitting an electron beam; providing a leakage current detector for sensing a current through the anode and/or the Wehnelt cup; providing a low impedance voltage source connectable to the Wehnelt cup via a switch, where the voltage source is having a more negative potential than a negative potential applied to the cathode; and protecting the cathode against vacuum arc discharge energy currents when forming the three-dimensional article by providing the Wehnelt cup to the low impedance negative voltage by closing the switch when the leakage current detector is sensing a current through the anode and/or the Wehnelt cup which is higher than a predetermined value.