Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Directed energy deposition"”.
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Laser Finishing of Components by Directed Energy Deposition
L'abstract è presente nell'allegato / the abstract is in the attachment
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Laser Directed Energy Deposition for Processing and Repairing Steels
L'abstract è presente nell'allegato / the abstract is in the attachment
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Directed Energy Deposition Additive Manufacturing Supplier Sourcing for Aerospace
… P&W wants to explore the potential of Directed Energy Deposition (DED), an AM technology that could be used for bigger parts and adding features to existing parts. The project objective is to bring on DED suppliers to enable the acquisition of development metal hardware for P&W’s …
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Directed energy deposition of tool steel/copper alloy multi-material structures
… investigates the potential of MMSs fabricated by directed energy deposition (DED) using tool steel and copper alloy. Specifically, AISI H13 hot work tool steel is deposited on copper-beryllium alloy (CuBe) substrate using three deposition strategies: directly depositing H13 on CuBe (H13/CuBe), …
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Feasibility Assessment of Repairing Tools and Dies via Directed Energy Deposition
L'abstract è presente nell'allegato / the abstract is in the attachment
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An Investigation of Polymer Support Structures In Metal Directed Energy Deposition
Metal directed energy deposition (DED) can create complex components and has a high deposition rate compared to other metal additive manufacturing (AM) processes. As a result, DED is of interest to die and mold, energy, and aerospace industries, among others. However, the design space of DED is …
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Solidification behavior and texture of laser-wire directed energy deposition of 316L austenitic stainless steel
… texture of AM 316L produced using a laser-wire directed energy deposition (DED-LB) process was investigated and delta-ferrite morphology was utilized to determine the solidification pathway of AM 316L. Variations in shielding gas set-up and build type, single versus multi-track walls, resulted …
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Laser Directed Energy Deposition of tool steels; Investigating the heat treatment strategies and other potentialities of LDED
… (PLASWeld Ferro55), fabricated through Laser Directed Energy Deposition (LDED). The as-built microstructure of these steels comprises a martensitic matrix with ~10 vol.% retained austenite (RA) as a consequence of microsegregation at cellular\dendrite boundaries. The tempering behavior is …
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ADDITIVE MANUFACTURING OF SUPERHYDROPHOBIC STAINLESS STEEL COMPOSITES
… (BNNT) were mixed and printed via laser powder directed energy deposition (LP-DED). The additively manufactured surfaces were meant to mimic naturally occurring hydrophobic surfaces. Material characterization was conducted using contact angle analysis of water droplet tests, imaging of the …
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Printing on Objects: Curved Layer Fused Filament Fabrication on Scanned Surfaces with a Parallel Deposition Machine
… of technologies like direct write and directed energy deposition which can deposit layers onto uneven surfaces. Replicating these capabilities on consumer 3-axis FFF machines is difficult mainly due to issues with reliability, repeatability, and quality. This thesis proposes, …
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PROCESSING AND CHARACTERIZATION OF TINI-BASED ALLOYS FABRICATED BY LASER AIDED MANUFACTURING
<p>"Laser powder-based directed energy deposition (DED) is a major laser aided additive manufacturing (AM) process for metals. It applies laser energy to deposit metal powders to form 3D metal parts. Apart from manufacturing traditional alloys, DED can also be used to develop advanced alloys with …
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Real-Time Thermography for In Operando Additive Manufacturing Defect Mitigation using a Machine Learning Approach
Directed Energy Deposition (DED), a subset of additive manufacturing, produces materials such as metal–matrix composites and functionally graded coatings by utilizing a concentrated high-power laser as the primary energy source. In spite of its benefits, DED continues to be confronted by …
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Comprehensive modeling of process-molten pool condition-property correlations for wire-feed laser additive manufacturing
… due to its high level of automation, high deposition rates, and good quality of printed parts. The complexity of modeling the directed energy deposition (DED) process, high characterization and printing cost, and the destructive testing of the final build part for quality testing motivates …
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Compositional Optimisation of a Ni-based Superalloy for Additive Repair Applications
… methods are required to control and optimise the deposition of Ni-based superalloys. The commercial superalloy IN718 is currently used for certain AM repair applications. However, due to the limitations on the post-processing that may be tolerated, the complications of an irregular microstructure, …
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Processing-microstructure-property relationships in additively manufactured duplex stainless steels
… of processing parameters in laser powder directed energy deposition (LP-DED) and wire arc additively manufactured (WAAM) DSS alloys. A series of LP-DED samples at varying laser powers and scanning speeds were characterized to elucidate the complex influence processing parameters have on …
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Qualifizierung des Plasma-Pulver-Auftragschweißprozesses für die generative Herstellung von Bauteilen der Legierung 1.4404
Die generative Fertigung stellt eine Schlüsseltechnologie der Zukunft für weite Teile der Wirtschaft dar. Der Prozess des Plasma-Pulver-Auftragschweißens soll eine Lücke im bestehenden Portfolio an generativen Prozessen schließen. Zunächst wurde der klassische Beschichtungsprozess an die …
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Development and evaluation of interfacial structures for hybrid manufacturing
… manufacturing is a combination of additive (deposition) and subtractive (machining) manufacturing in a single machine tool. Such a system can be used for near net shape manufacturing and component repair using either similar or dissimilar materials. This dissertation investigates …
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The effect of the build orientation and heat treatment on the fatigue and fracture properties of a directed energy deposited nickel-based superalloy (Inconel 718)
… by additive manufacturing technique, directed energy deposition (DED). Three different build orientations namely XY, XZ and ZX, in both the as-built and heat-treated conditions were tested through a combination of comparative fatigue crack growth rate (FCGR) and fracture toughness (FT) …
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Towards effective production in DED: linking process parameters to the properties of the deposition
L'abstract è presente nell'allegato / the abstract is in the attachment