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laser directed-energy deposition

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Published: 30 June 2023
Fig. 7 Schematics of (a) laser directed-energy deposition, and (b) laser powder-bed fusion processes. Reprinted from Ref 46 with permission from Elsevier (c) binder jetting process. Reprinted from Ref 51 under the CC-BY-SA-4.0 International license More
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Published: 30 June 2023
Fig. 11 Frame from a high-speed video of the laser directed-energy deposition with powder feedstock (DED-L/P) process, with a magnified view of the melt pool showing different elements observed for a laser power of 5 kW, cladding speed of 0.5 m/min (1.6 ft/min), and a powder feed rate of 30 g More
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Published: 30 June 2023
Fig. 2 Typical powder-blown, laser directed-energy deposition system. AM, additive manufacturing. Source: Ref 1 More
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Published: 15 June 2020
Fig. 4 Examples of deposition process. (a) Laser-based directed-energy deposition (DED). Courtesy of Center for Innovative Materials Processing through Direct Digital Deposition, Pennsylvania State University. (b) Electron-beam-based DED. Courtesy of NASA Langley Research Center More
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Published: 15 June 2020
Fig. 5 Schematic of laser-based directed-energy deposition head. A transmissive focusing optic focuses an incoming collimated beam for processing. More
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Published: 15 June 2020
Fig. 11 Illustration of the laser-based directed-energy deposition process showing important processing parameters. P , power; V , velocity; M , mass feed rate; d spot , spot size of the energy source; S , spacing between adjacent deposition beads, or hatch spacing More
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Published: 15 June 2020
Fig. 12 Schematic of a laser-based directed-energy deposition process for two adjacent deposits produced by using constant power ( P 1 and P 2 ), velocity, and spot size ( d spot ) with a spacing ( S ) that provides sufficient overlap. H dep , deposit height; H layer , layer height More
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Published: 15 June 2020
Fig. 15 (a) Image of powder feeding within a laser-based directed-energy deposition system using four feeding nozzles. (b) Schematic depicting beam and powder characteristics in the energy interaction area. Courtesy of the Center for Innovative Materials Processing through Direct Digital More
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Published: 15 June 2020
Fig. 20 Measured temperatures during laser-based directed-energy deposition of Ti-6Al-4V alloy during production of a single-track, five-layer build. Source: Ref 18 More
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Published: 15 June 2020
Fig. 24 Image of laser-based directed-energy deposition process for selectively adding features to a cylindrical component. Courtesy of Synergy Additive Manufacturing LLC More
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Published: 15 June 2020
Fig. 25 Image of laser-based directed-energy deposition process for depositing a wear-resistant material onto the surface of a large die. Courtesy of Alabama Laser More
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Published: 15 June 2020
Fig. 26 Image of laser-based directed-energy deposition process used to restore geometric dimensions on a titanium shaft. Courtesy of the Center for Innovative Materials Processing through Direct Digital Deposition, Pennsylvania State University More
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Published: 15 June 2020
Fig. 27 Images of laser-based directed-energy deposition system applied to produce a complex IN-718 alloy casing, which is also shown in the completed near-net form. Courtesy of RPM Innovations More
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Published: 12 September 2022
Fig. 4 Schematics of two types of directed energy deposition systems. (a) Laser as the energy source with a powder feedstock. (b) Electron beam as the energy source with a wire feedstock More
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006564
EISBN: 978-1-62708-290-7
... Abstract This article covers in-line process monitoring of the metal additive manufacturing (AM) methods of laser and electron beam (e-beam) powder-bed fusion (PBF) and directed-energy deposition (DED). It focuses on methods that monitor the component directly throughout the build process...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006972
EISBN: 978-1-62708-439-0
... Abstract This article presents a general understanding of causes and possible solutions for defects in the most common metal additive manufacturing (AM) processes: laser powder-bed fusion (L-PBF), laser directed-energy deposition (DED-L), and binder jetting (BJ). additive manufacturing...
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Published: 30 June 2023
Fig. 8 Percent contribution of various pore-formation mechanisms during laser directed-energy deposition with powder feedstock. Source: Ref 91 More
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Published: 30 June 2023
Fig. 7 Powder-fed melt pool and surrounding layers/zones during laser directed-energy deposition with powder feedstock. Source: Ref 78 More
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Published: 30 June 2023
Fig. 9 X-ray imaging system at the Diamond Light Source, performed on a laser directed-energy deposition process. Adapted from Ref 24 More
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Published: 15 June 2020
Fig. 15 Schematic of spectrometer system that monitors element emission lines in the plasma generated by a laser directed-energy deposition system. Adapted from Ref 27 More