Powder bed
Residual Stress-induced Distortions in Laser Powder Bed Additive Manufacturing of Nickel-based Superalloys
... the powder bed is lowered by one layer of thickness, a new layer of material is spread on top with a re-coater, and the process is repeated until the part is complete ...
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In process measurement and monitoring of a polymer laser sintering powder bed with fringe projection
... the powder bed surface, the viewing angle was roughly 55° from ...the powder recoater blade entering the scanning volume or the powder bed being lowered for the next ...
17
Internal surface measurement of metal powder bed fusion parts
... Abstract. Recent advances in X-ray computed tomography (XCT) have allowed for measurement resolutions approaching the point where XCT can be used for measuring surface topography. These advances make XCT appealing for ...
14
Analytical Modeling of Residual Stress in Laser Powder Bed Fusion
... In this study, the physics-based prediction modeling methodology is implemented in the cased of laser powder bed fusion of maraging steel 350 (18Ni350 or M350) as a material of example. Maraging steel grade ...
20
Particle Transmission through Respirators Fabricated with Fused Filament Fabrication and Powder Bed Fusion Additive Manufacturing
... industrial-scale powder bed fusion processes have insufficient filtration efficiency at the size of the SARS-CoV-2 virus, even while assuming a perfect seal between the respirator and the user’s ...
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Using laser ultrasound to detect sub surface defects in metal laser powder bed fusion components
... Laser powder bed fusion offers many advantages over conventional manu- facturing methods, such as the integration of multiple parts that can result in significant ...
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Electropolishing of Laser Powder Bed-Fused IN625 Components in an Ionic Electrolyte
... Almost all three-dimensional (3D)-printed metal parts require surface finishing to meet performance standards. Efforts to develop surface finish techniques for parts that are manufactured by metal laser powder ...
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Optimisation of blade type spreaders for powder bed preparation in additive manufacturing using DEM simulations
... low-quality bed gen- erated using a blade is essentially a result of its geometry – as was suggested in [1] – it can be rectified purely by geometric modification of the ...the bed quality and then using a ...
11
Feature based characterisation of signature topography in laser powder bed fusion of metals
... Abstract. The use of state-of-the-art areal topography measurement instrumentation allows for a high level of detail in the acquisition of topographic information at micrometric scales. The three-dimensional geometric ...
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Characterization of 316L Spatter Particle Morphologies Produced during Laser Powder Bed Fusion Additive Manufacturing
... Laser powder bed fusion additive manufacturing (PBF AM) uses atomized metal powder as input feedstock for part production by spreading the powder into thin, sequential layers then exposing ...
86
Material interactions in laser polishing powder bed additive manufactured Ti6Al4V components
... metal powder-based additive manufacturing (AM) technologies have stimulated great interest in many industrial ...(EBM) powder bed processes and laser metal deposition (LMD) blown powder ...
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A Simplified Methodology for Estimating Residual Stresses in Powder Bed Electron Beam Additive Manufacturing
... The cooling rate during the creep temperature, e.g. ap- proximately 700–1000C, is generally high. For example in this experimental condition, the average rate at the base plate was 19C/minute from 1000C to 700C. In ...
5
In-situ residual stress reduction, martensitic decomposition and mechanical properties enhancement through high temperature powder bed pre-heating of Selective Laser Melted Ti6Al4V
... Ti6Al4V-ELI powder with a particle size of 15-45µm from Technik Spezialpulver (TLS), was used within this ...100ºC powder bed pre-heat temperature for density optimisation ...for powder ...
28
Automatic quality assessments of laser powder bed fusion builds from photodiode sensor measurements
... This study evaluates whether a combination of photodiode sensor mea- surements, taken during laser powder bed fusion (L-PBF) builds, can be used to predict the resulting build quality via a purely ...
31
Additive manufacturing of glass with laser powder bed fusion
... laser powder bed fusion and postprocessing methods to suit partic- ular applications for example, partially fused powder particles could act as baffles in micro‐fluidic channels; an example of a ...
5
Salt metal feedstocks for the creation of stochastic cellular structures with controlled relative density by powder bed fabrication
... of powder to flow through the ...of powder, which can result in build ...the powder distribution system was able to deliver a visually compact and even powder bed within the salt ...
28
Targeted rework strategies for powder bed additive manufacture
... a powder-bed-fusion additive manufacturing (AM) process that is being increasingly considered as an alternative to current manufacturing methods in a number of high value- added industries ...
11
Benchmarking of Laser Powder Bed Fusion Machines
... Abstract: This paper presents the methodology and results of an extensive benchmarking of laser powder bed fusion (LPBF) machines conducted across five top machine producers and two end users. The objective ...
30
Supply Chain Operations Reference Model for U.S. Based Powder Bed Metal Additive Manufacturing Processes.
... SHOUCHE, SURABHI. Supply Chain Operations Reference Model for U.S. Based Powder Bed Metal Additive Manufacturing Processes. (Under the direction of Dr. Richard A. Wysk). This thesis focuses on modeling the ...
85
Construction of Cellular Substructure in Laser Powder Bed Fusion
... Laser powder bed fusion (LPBF) is a metal additive manufacturing technology. LPBF was developed to directly fabricate metal parts and tools with complex shape [1]. Later, it was found that metal parts ...
9