Abstract: A system includes an enclosed laser powder bed fusion (LPBF) containment volume. A powder drain is included below the containment volume configured to receive powder dropping from the containment volume by force of gravity. A valve below the powder drain is configured to allow passage with the valve in an open state of unfused powder from the drain into a powder collection volume separated from the containment volume by the valve, and prevent passage of powder from the drain into the collection volume with the valve in a closed state. A source of wetting agent is in fluid communication with the powder collection volume for capturing powder in the collection volume by wetting the powder. A moisture trap is operatively connected to the drain above the valve and is configured to capture moisture to prevent moisture from the collection volume migrating into the containment volume.

Abstract: A combustor for a gas turbine engine includes a combustor liner and a dilution chute integral and conformal with the combustor liner to provide an outlet into the combustor for fuel, wherein the dilution chute has at least one wall with a tapered edge extending into an interior of the combustor.

Abstract: A system for depowdering additively manufactured parts includes a deflection plate, a hammer device mounted to a first side of the deflection plate, and a mounting plate operatively connected to a second side of the deflection plate relative to the hammer device, the mounting plate being configured for rotation relative to the deflection plate.

Abstract: A system includes an enclosed laser powder bed fusion (LPBF) containment volume. A powder drain is included below the containment volume configured to receive powder dropping from the containment volume by force of gravity. A valve below the powder drain is configured to allow passage with the valve in an open state of unfused powder from the drain into a powder collection volume separated from the containment volume by the valve, and prevent passage of powder from the drain into the collection volume with the valve in a closed state. A source of wetting agent is in fluid communication with the powder collection volume for capturing powder in the collection volume by wetting the powder. A moisture trap is operatively connected to the drain above the valve and is configured to capture moisture to prevent moisture from the collection volume migrating into the containment volume.

Abstract: Disclosed is a system for depowdering a workpiece formed from a reactive powder by an additive manufacturing process. The system includes a powder removal enclosure, an inert gas source, a sealed ultrasonic transducer, an oxygen sensor, and a controller coupled to the sealed ultrasonic transducer and the oxygen sensor. The controller is configured to perform a plurality of operations including monitoring the oxygen sensor to observe an oxygen level within the powder removal enclosure as an inert gas from the inert gas source displaces a gas environment within the powder removal enclosure, and applying electrical power to the sealed ultrasonic transducer within the powder removal enclosure to ultrasonically remove a residual amount of the reactive powder from the workpiece based on determining that the oxygen level within the powder removal enclosure is below a minimum oxygen level threshold.

Abstract: A system includes an enclosed laser powder bed fusion (LPBF) containment volume. A powder drain is included below the containment volume configured to receive powder dropping from the containment volume by force of gravity. A valve below the powder drain is configured to allow passage with the valve in an open state of unfused powder from the drain into a powder collection volume separated from the containment volume by the valve, and prevent passage of powder from the drain into the collection volume with the valve in a closed state. A source of wetting agent is in fluid communication with the powder collection volume for capturing powder in the collection volume by wetting the powder. A moisture trap is operatively connected to the drain above the valve and is configured to capture moisture to prevent moisture from the collection volume migrating into the containment volume.

Abstract: A combustor for a gas turbine engine includes a combustor liner and a dilution chute integral and conformal with the combustor liner to provide an outlet into the combustor for fuel, wherein the dilution chute has at least one wall with a tapered edge extending into an interior of the combustor.

Abstract: A system includes an enclosed laser powder bed fusion (LPBF) containment volume. A powder drain is included below the containment volume configured to receive powder dropping from the containment volume by force of gravity. A valve below the powder drain is configured to allow passage with the valve in an open state of unfused powder from the drain into a powder collection volume separated from the containment volume by the valve, and prevent passage of powder from the drain into the collection volume with the valve in a closed state. A source of wetting agent is in fluid communication with the powder collection volume for capturing powder in the collection volume by wetting the powder. A moisture trap is operatively connected to the drain above the valve and is configured to capture moisture to prevent moisture from the collection volume migrating into the containment volume.

Abstract: A method for removing a residual powder from an internal compartment of an additively manufactured article includes discharging a first burst of pressurized fluid into the internal compartment through a first end, and vacating at least a portion of the residual powder through a second end valve at a second end.

Abstract: Methods and systems for treating an additively manufactured components are described. The methods include placing the additively manufactured component into a treatment chamber within a treatment vessel, performing a first treatment operation on the additively manufactured component within the treatment vessel, using a first treatment material, and performing a second treatment operation on the additively manufactured component within the treatment vessel, using a second treatment material, wherein the first treatment material is a gaseous treatment material and the second treatment material is a liquid treatment material.