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 8 of 8 for “"direct energy deposition"”.
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Wire Direct Energy Deposition of Cobalt Iron Alloy
The presented research explores the Wire-Laser Direct Energy Deposition of Fe17Co alloy for soft magnetic applications. Process parameters starting from power, feed speed, and feed/scan ratios were optimized where a high confidence multi-factor regression model was developed correlating the …
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Layer-to-Layer Feedback Control for Direct Energy Deposition Additive Manufacturing
… quality parts repeatably. More specifically, direct energy deposition (DED) of metal powders is a process capable of producing and repairing parts with complex geometries; however, it is not widely used in industry due to challenges with quality control. In this process, metal powder is …
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Impact and melting dynamics of micron-sized particles on a liquid pool
… and controlling the workpiece quality during direct energy deposition, a form of metal additive manufacturing. In this work, an organic transparent model system was designed, in which impact and subsequent melting of paraffin wax particles (melting point: ≈60°C, diameter: 200-800 μm, impact …
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Multi-scale investigations of the Resistance to helium embrittlement with Direct Energy Deposited Inconel 718
… and fusion reactors, in an economical manner, Direct Energy Deposition (DED) was utilized with the existing alloy, Inconel 718. Based on previous works with DED and laser welding, it was hypothesized that nano-sized pores could be engineered within the matrix of the sample to maximize the …
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Energy loss and equilibration of a highly energetic parton in QCD plasmas
… or quark) traverses the medium, it loses its energy as a result of interactions with the medium. In this thesis, we describe the full in-medium kinetic and chemical equilibration of hard particles, using a linearized effective kinetic description of QCD at leading order. Since we include …
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Thermoelectric Energy Harvesting in Harsh Environments and Laser Additive Manufacturing for Thermoelectric and Electromagnetic Materials
… in sensor powering for extreme environments, energy harvesting, and materials fabrication. The research is divided into three key areas, each contributing to advancements in its respective domain. First, a self-powered wireless through-wall data communication system was developed for …
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Supportless Fabrication, Experimental, and Numerical Analysis of the Physical Properties for a Thin-Walled Hemisphere
Although multi-axis bead deposition-based additive manufacturing processes have been investigated in many aspects in the literature, a general process planning approach to address collision detection and prevention still needs to be developed to fabricate complex thin-wall geometries in a …
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Recycling of worn-out vehicular brake pads and discs
… discs by coating with metallic powders through direct energy deposition. For refurbishing worn-out brake discs, laser deposition technique I indicated to be a promising option as it is feasible to deposit a wide range of coating materials providing a good metallurgical bonding with GCI …