Browsing 2018 International Solid Freeform Fabrication Symposium by Title
Now showing items 88-107 of 200
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Hybrid Manufacturing with FDM Technology for Enabling Power Electronics Component Fabrication
(University of Texas at Austin, 2018)The introduction of Kapton coated wires within a printed substrate presents the opportunity to design and fabricate power electronics components. Preventing dielectric breakdown of the printed substrate, the ultrasonic ... -
Immiscible-Interface Assisted Direct Metal Drawing
(University of Texas at Austin, 2018)State-of-the-art metal additive manufacturing (AM) techniques construct a three-dimensional (3D) structure through sintering or melting dry metal powders in a layer-by-layer fashion, which consequently results in some ... -
Impact Testing of 3D Printed Kevlar-Reinforced Onyx Material
(University of Texas at Austin, 2018)Kevlar is a common reinforcement used in composites for applications requiring impact resistance. This research evaluated the impact performance of 3D printed continuously reinforced Kevlar fiber on 3D printed nylon ... -
An Improved Vat Photopolymerization Cure Model Demonstrates Photobleaching Effects
(University of Texas at Austin, 2018)An improved high-fidelity simulation model for a grayscale projection micro-stereolithography process has been developed. The modeling purpose is to accurately predict cured part shapes and dimensions, given a radiation ... -
In-Situ Optical Emission Spectroscopy during SLM of 304L Stainless Steel
(University of Texas at Austin, 2018)This paper demonstrates the potential of in-situ Optical Emission Spectroscopy (OES) to monitor the Selective Laser Melting (SLM) process. A spectrometer is split into the beam path of a home-built SLM system to collect ... -
Incorporation of Automated Ball Indentation Methodology for Studying Powder Bed Fabricated 304L Stainless Steel
(University of Texas at Austin, 2018)Automated Ball Indentation (ABI) is a viable method for estimating the ductility, yield stress, and ultimate stress, among other metrics, in different metallic materials. Currently, ABI data analysis utilizes Holloman’s ... -
Increasing Interlaminar Strength in Large Scale Additive Manufacturing
(University of Texas at Austin, 2018)Interlaminar strength of extrusion-based additively manufactured parts is known to be weaker than the strength seen in the printed directions (X and Y). With Big Area Additive Manufacturing (BAAM), large parts lead to ... -
Individual and Coupled Contributions of Laser Power and Scanning Speed Towards Process-Induced Porosity in Selective Laser Melting
(University of Texas at Austin, 2018)Porosity is an undesirable characteristic of selective laser melting (SLM) process and keyhole pores are formed when the energy density is very high which leads to deep penetration melting. In this study, single-track ... -
The Influence of Build Parameters on the Compressive Properties of Selective Laser Melted 304L Stainless Steel
(University of Texas at Austin, 2018)Process parameters used during Selective Laser Melting (SLM) process have significant effects on the mechanical properties of the manufactured parts. In this study, the influence of two build parameters (build orientation ... -
The Influence of Contour Scanning Parameters and Strategy on Selective Laser Sintering PA613 Build Part Properties
(University of Texas at Austin, 2018)Qualification of new materials for the laser sintering (SLS) process includes development of suitable parameters in terms of optimal part properties. Especially laser scanning parameters influence part porosity and ... -
Influence of Grain Size and Shape of Mechanical Properties of Metal AM Materials
(University of Texas at Austin, 2018)Metal powder-based additive manufacturing (PAM) typically results in microstructures with a texture and columnar grain structure. The columnar grains can vary greatly in size and shape throughout the microstructure, which ... -
Influences of Printing Parameters on Semi-Crystalline Microstructure of Fused Filament Fabrication Polyvinylidene Fluoride (PVDF) Components
(University of Texas at Austin, 2018)Piezoelectric polymers have garnered wide interest for sensing, actuation, and energy harvesting applications due to their unique combination of high strain tolerance and electro-mechanical coupling. Compared to other ... -
Insights into Powder Flow Characterization Methods for Directed Energy Distribution Additive Manufacturing Systems
(University of Texas at Austin, 2018)Powder-blown Directed Energy Distribution Additive Manufacturing systems often feed powdered metal into a melt pool generated by a laser. As the laser is moved, the melt pool solidifies, leaving behind a deposit. Such ... -
An Investigation into Metallic Powder Thermal Conductivity in Laser Powder Bed Fusion Additive Manufacturing
(University of Texas at Austin, 2018)This study investigates the thermal conductivity of metallic powder in laser powder-bed fusion (LPBF) additive manufacturing. The intent is to utilize a methodology combining laser flash testing, finite element (FE) heat ... -
Investigation into the Crystalline Structure and sub-Tpm Exotherm of Selective Laser Sintered Polyamide 6
(University of Texas at Austin, 2018)Selective Laser Sintering (SLS) has achieved a wide acceptance for direct manufacture of complex functional components. However, the performance of SLS part still needs to be improved, in which the crystalline structure ... -
An Investigation of the Fatigue Strength of Multiple Cellular Structures Fabricated by Electron Beam Powder Bed Fusion Additive Manufacturing Process
(University of Texas at Austin, 2018)In this study multiple cellular structures, including the re-entrant auxetic, the octet-truss, and the BCC lattice, were evaluated for their relative performance of fatigue strength under compression-compression cyclic ... -
Knowledge-Based Material Production in the Additive Manufacturing Lifecycle of Fused Deposition Modeling
(University of Texas at Austin, 2018)The additive manufacturing (AM) lifecycle starts with the material production. This phase has an impact on the AM process and its quality. Nowadays, information concerning material production is not connected to the ... -
Laser Heated Electron Beam Gun Optimization to Improve Additive Manufacturing
(University of Texas at Austin, 2018)Electron Beam Additive Manufacturing requires to improve electron gun characteristics to become a highly competitive manufacturing process. Our work targets the optimization of beam focusing to reduce the beam spot size, ... -
Laser Metal Additive Manufacturing on Graphite
(University of Texas at Austin, 2018)Metal powders are typically directly fused to a metal substrate of similar composition in metal powder-bed fusion additive manufacturing. This work presents a process for printing a metal alloy directly on graphite, ... -
Laser Sintering of PA12/PA4,6 Polymer Composites
(University of Texas at Austin, 2018)This work investigates the laser sintering (LS) processing of polyamide-12/polyamide-4,6 composites and the performance of resulting parts. The coalescence and consolidation of the PA12/PA4,6 powder mixture are characterized. ...
