Aspects of the disclosure are directed to additively manufacturing a three-dimensional structure. As may be implemented in accordance with one or more embodiments, a plurality of stacked layers are deposited, and for one or more respective layers of the plurality of stacked layers, pores are formed within the layer by applying pulsed energy to the layer. The pulsed energy is used to create a space sealed within the layer and having an inner surface defined by material of the layer.

An apparatus for manufacturing a composite article from a composite material. The apparatus comprising: a pulsed broadband radiation source comprising a flashlamp and a light guide adapted to guide light emitted by the pulsed broadband radiation source to a target area. The light guide comprises at least a portion ahead of the pulsed broadband radiation source, relative to the target area, comprising a light transmitting material.

An interchangeable chamber is provided for a 3D printing device, wherein the interchangeable chamber includes a building space for receiving a building platform on which a three-dimensional object can be produced, which building space is designed to be temporarily open in the direction of a top of the interchangeable chamber, as well as optionally a storage container for storing building material and wherein the interchangeable chamber comprises a side wall and a cover, wherein the cover is adapted to close the interchangeable chamber at the top such that building material cannot get through the cover out of nor into the interchangeable chamber and the cover is coupled with the side wall.

A method of selecting a scanning sequence of a laser beam in a selective laser solidification process, in which one or more objects are formed layer-by-layer by, repeatedly, depositing a layer of powder on a powder bed and scanning a plurality of laser beams over the deposited powder to selectively solidify the powder layers, wherein a gas flow is passed over the powder bed in a gas flow direction. The method including selecting a scanning sequence for the plurality of laser beams to include the simultaneous exposure of an upstream point together with a downstream point located downstream of a flow of debris carried from the upstream point by the gas flow, the downstream and upstream points selected for simultaneous exposure based upon the downstream point being within a maximum separation distance from the upstream point.

A system and method of monitoring a powder-bed additive manufacturing process is provided where a layer of additive powder is fused using an energy source and electromagnetic emission signals are measured by a melt pool monitoring system to monitor the print process. The measured emission signals are analyzed to identify outlier emissions and clusters of outliers are identified by assessing the spatial proximity of the outlier emissions, e.g., using clustering algorithms, spatial control charts, etc. An alert may be provided or a process adjustment may be made when a cluster is identified or when a magnitude of a cluster exceeds a predetermined cluster threshold.

The invention relates to a method for controlling an irradiation system (20), the irradiation system (20) being used in a device (10) for the additive manufacturing of three-dimensional workpieces and comprising at least three irradiation units (22a-d, 50), the method comprising the following steps: a) defining an irradiation region (30a-d) for each of the irradiation units (22a-d, 50), the irradiation regions (30a-d) each comprising a portion of an irradiation plane (28) which extends parallel to a carrier (16) of the device (10), and the irradiation regions (30a-d) being defined such that they overlap in a common overlap region (34); b) irradiating a raw material powder layer on the carrier (16) to produce a workpiece layer; c) arranging a further raw material powder layer on the already jetted raw material powder layer to produce a further workpiece layer. d) The invention also relates to a device for performing this method.

A method for manufacturing a target material is provided and includes installing a substrate, providing a raw material powder to the substrate, melting the raw material powder on the substrate by a laser, and repeating the step of providing the raw material powder to the substrate to melting the raw material powder on the substrate by the laser to form a target material and rapidly cooling the formed target material. As such, the target material is produced by the method of lamination manufacturing via the rapid cooling property, so as to avoid the problems of high cost, long man-hours and poor quality of the target material in the conventional techniques.

A method for manufacturing a target material is provided and includes installing a substrate, providing a raw material powder to the substrate, melting the raw material powder on the substrate by a laser, and repeating the step of providing the raw material powder to the substrate to melting the raw material powder on the substrate by the laser to form a target material and rapidly cooling the formed target material. As such, the target material is produced by the method of lamination manufacturing via the rapid cooling property, so as to avoid the problems of high cost, long man-hours and poor quality of the target material in the conventional techniques.

A method for producing a three-dimensional component by means of a laser melting process, in which the component is produced by consecutively solidifying individual layers made of building material by melting the building material, wherein said building material can be solidified by the action of radiation, wherein the melting area produced by a punctiform and/or linear energy input is detected by a sensor device and sensor values are derived therefrom in order to evaluate the component quality. The sensor values detected in order to evaluate the component quality are stored together with the coordinate values that locate the sensor values in the component and are displayed by means of a visualization unit in two- and/or multi-dimensional representation with respect to the detection location of the sensor values in the component.

An additive manufacturing system including a two-dimensional energy patterning system for imaging a powder bed is disclosed. The two-dimensional energy patterning system may be used to control the rate of cooling experienced by each successive additive layer. Accordingly, the system may be used to heat treat the various additive layers.