2012 International Solid Freeform Fabrication Symposium
Proceedings for the 2012 International Solid Freeform Fabrication Symposium. For more information about the symposium, please see the Solid Freeform Fabrication website .
Recent Submissions
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Effects of Processing on Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated using Electron Beam Melting (EBM): Orientation and Location
(2012)Electron beam melted (EBM) titanium alloy (Ti-6Al-4V) samples were built and characterized (qualitative prior-β grain size, quantitative α lath thickness, monotonic tensile, Vickers microhardness) to determine the effect ... -
Controlling the Quality of Laser Sintered Parts Along the Process Chain
(University of Texas at Austin, 2012-08-22)The quality of laser sintered parts, in this work, manufactured by polymer laser sintering by using an EOSINT P395 Laser Sintering system, depends on several steps along the process chain. The first step is the ... -
Characterisation of Metal Deposition During Additive Manufacturing of Ti-6Al-4V by Arc-Wire Methods
(University of Texas at Austin, 2012)This study considers the use of the gas tungsten arc (GTA) welding process in conjunction with ‘cold’ wire addition to give layer-wise build-up of thin walled structures, simulating those commonly found in aerospace ... -
Thermography for Monitoring the Selective Laser Melting Process
(University of Texas at Austin, 2012-08-22)A lot of strategies exist to monitor and control additive layer manufacturing processes. Basically one can distinguish between coaxially monitoring the process zone and monitoring the complete layer currently being built. ... -
An Investigation of the Effects of Quantum Dot Nanoparticles on Photopolymer Resin for Use in PolyJet Direct 3D Printing
(University of Texas at Austin, 2012-08-15)The addition of quantum dot (QD) nanoparticles to additive manufacturing (AM) media provides the opportunity to create artifacts with complex geometry that also have unique optical characteristics. However, the addition ... -
Error Detection in Laser Beam Melting Systems by High Resolution Imaging
(University of Texas at Austin, 2012-08-15)Laser Beam Melting as a member of Additive Manufacturing processes allows the fabrication of three-dimensional metallic parts with almost unlimited geometrical complexity and very good mechanical properties. However, its ... -
Efforts to Reduce Part Bed Thermal Gradients During Laser Sintering Processing
(University of Texas at Austin, 2012-08-15)Part bed surface thermal gradients (x-y plane) are usually present in laser sintering (LS) fabricators. The purpose of this study was to investigate various means to reduce these thermal gradients. Several experiments ... -
Integration of a Thermal Imaging Feedback Control System in Electron Beam Melting
(University of Texas at Austin, 2012-08-15)A thermal imaging system using an infrared (IR) camera was incorporated in the fabrication process of an Arcam A2 Electron Beam Melting system to provide layer-by-layer feedback and ensure quality and defect free products. ... -
Combined Build-Time, Energy Consumption and Cost Estimation for Direct Metal Laser Sintering
(University of Texas at Austin, 2012-08-15)As a single-step process, Additive Manufacturing (AM) affords full measurability with respect to process energy inputs and production cost. However, the parallel character of AM (allowing the contemporaneous production ... -
A Designer's Guide for Dimensioning and Tolerancing SLS Parts
(University of Texas at Austin, 2012)Because additive manufacturing (AM) is a relatively novel industry, with the first commercial machines introduced in the late 1980s, many designers are unaware of the capabilities of AM technologies. Many engineers also ... -
Proposal for a Standardized Test Artifact for Additive Manufacturing Machines and Processes
(University of Texas at Austin, 2012-08-15)Historically, standardized test parts are used to quantitatively evaluate the performance of a machine or process. While several different additive manufacturing (AM) test parts have been developed in the past, there are ... -
First Steps Towards Collaboratively Edited Design for Additive Manufacturing Knowledge
(University of Texas at Austin, 2012-08-18)Despite the broad coverage concerning the technological challenges, little research has been performed on the methods that enable designers to deal with Additive Manufacturing. At present, the challenge is to generate ... -
Examining Variability in the Mechanical Properties of Parts Manufactured via PolyJet Direct 3D Printing
(University of Texas at Austin, 2012-08-15)In Objet’s PolyJet process, part layers are created by selectively inkjetting photopolymers onto a build substrate and then cured with ultraviolet lamps. With an eye towards using PolyJet as a manufacturing process to ... -
Ceramic-Polymer Additive Manufacturing System for Ultrasound Transducers
(University of Texas at Austin, 2012)A modified multi-layer lithography process is used to additively manufacture highresolution netshape ceramic structures by photopolymerizing a ceramic-polymer slurry using structured light patterns. This paper will discuss ... -
Fast Recoating Methods for the Projection-based Stereolithography Process in Micro- and Macro-Scales
(University of Texas at Austin, 2012)The purpose of this paper is to present a recoating method for the development of a direct digital manufacturing (DDM) process that can be an order of magnitude faster than other currently available DDM processes. In the ... -
Fused Deposition Modeling of Metals
(University of Texas at Austin, 2012-08-22)Studies have been conducted to improve previous work performed in developing a Fused Deposition Modeling for metals (FDMm) system used for applications in electronics and fabrication of 3-dimensional metallic structures. ... -
Multi-Material, Multi-Technology FDM System
(University of Texas at Austin, 2012-08-15)A multi-material, multi-technology FDM system was developed and constructed to enable the production of novel thermoplastic parts. Two legacy FDM systems were modified and installed onto a single manufacturing system to ... -
Remanufacture of Turbine Blades by Laser Cladding, Machining and In-Process Scanning in a Single Machine
(University of Texas at Austin, 2012-08-16)Remanufacturing is one of the most efficient ways of recycling worn parts because it consumes only a fraction of the energy, cost, and material required for new parts. Remanufacture of engineering components typically ... -
Observation and Numerical Simulation of Melt Pool Dynamic and Beam Powder Interaction During Selective Electron Beam Melting
(University of Texas at Austin, 2012)Selective electron beam melting (SEBM) is an additive manufacturing method used to produce complex parts in a layer-by-layer process utilizing Ti6Al4V powder. To improve the very good properties of built parts even more ... -
A Review of Thermal Analysis Methods in Laser Sintering and Selective Laser Melting
(University of Texas at Austin, 2012)Thermal analysis of laser processes can be used to predict thermal stresses and microstructures during processing and in a completed part. Thermal analysis is also the basis for feedback control of laser processing ...
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