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Showing 1 to 9 of 9 for “"powder spreading"”.
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Design and Fabrication of an Oscillating Tool for Powder Spreading in Metal Additive Manufacturing
Powder spreading methods for metal additive manufacturing processes, such as laser powder bed fusion and binder jetting, are intended to produce thin, dense, and uniform powder layers in order for finished parts to have satisfactory material and mechanical properties. The spreading of fine powders …
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Testbeds for Advancement of Powder Bed Additive Manufacturing with Application to Reactive Binder Jetting of Ceramics
… in the solid state. The formation of the powder bed is a critical step to ensuring quality parts are produced via binder jetting, but low powder bed densities and a lack of understanding of the effect of recoating parameters have limited the applicability of binder jet components. …
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Three dimensional printing with fine metal powders
… for direct manufacture via the 3DPTM process. Powder size is the limiting factor in the determination of the surface finish of 3DPTM parts. On the micro scale, it determines the roughness due to particle arrangement, and on the macro scale it determines the thinnest layers from which parts may …
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Characterization and Improvement of Powder Properties Through Plasma Spheroidization for use in the Laser Powder Bed Fusion Process
… research was conducted to characterize the powder properties using different characterization techniques to enhance the powder behavior in the Laser Powder Bed Fusion (LPBF) process. One of the shortcomings of LPBF process is the high cost of gas-atomized powder feedstock. To overcome this …
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Computational-Experimental Process Development for Laser Powder Bed Fusion Additive Manufacturing
Laser powder bed fusion (LPBF) additive manufacturing (AM) is instrumental for advances in high-value industries such as aerospace and medical devices. However, widespread adoption is still held back, in part due to challenges with powder handling, identification of process parameters, part …
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Powder Bed Surface Quality and Particle Size Distribution for Metal Additive Manufacturing and Comparison with Discrete Element Model
… overall quality of a part, one of them being the powder bed itself. So far, little investigation has been dedicated to the behavior of the powder in the powder bed during the lasering process. A powder spreading machine that simulates the powder bed fusion process without the laser was designed by …
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A precision blade mechanism for powder recoating in Selective Laser Melting
… wide variety of alloys. In this process, a metal powder is spread onto a build surface in a thin layer, and then the powder is selectively melted to form a cross-sectional slice of the part. This process is repeated until the part is complete. The packing density and uniformity of the powder layer …
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Characterization and recyclability of 304L stainless steel powder for use in the selective laser melting process
"Powder-bed fusion refers to a subset of additive manufacturing (AM) methods which successively melts and solidifies selected regions within a powder bed on a layer-by-layer basis to construct components directly from computer-aided design files. Laser Powder-Bed Fusion (L-PBF) is a process among …
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Tailoring Mechanical Properties and Porosity in Laser Powder Bed Fusion by Spatial Manipulation of Feedstock Composition
… the feedstock for metal AM is a single alloy powder, metal powder, or a stochastic mixture of alloys. The design space of AM can be expanded by techniques for local manipulation of the powder feedstock, thereby enabling the tailoring of composition or microstructure gradients to improve …