1999 International Solid Freeform Fabrication Symposium
Recent Submissions
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Direct Fabrication of Polymer Composite Structures with Curved LOM
(1999)This report describes the application of Curved LOM to the direct fabrication of polymer matrix composites (PMCs). The overall methodology of directly fabricating PMC parts involved the use of the Curved LOM machine to ... -
Coated Feedstock for Fabrication of Ceramic Parts by CAM-LEM
(1999)In laminated object manufacturing of ceramic components, lamination is one of the most important materials issues. Good lamination ensures monolithic component after firing. Otherwise, lamination defects that inevitably ... -
Process Maps for Laser Deposition of Thin-Walled Structures
(1999)In solid freeform fabrication (SFF) processes involving thermal deposition, thermal control of the process is critical for obtaining consistent deposition conditions and in limiting residual stress-induced warping of ... -
Microstructure and Property Optimization of LENS Deposited H13 TooFSteel
(1999)Direct laser metal deposition is a means of near net shape processing that offers a number of advantages including rapid prototyping and small lot production. With the LENS (Laser Engineered Net Shape) process [Ref 1], ... -
Process Variable Effects on Laser Deposited Ti-6Al-4V
(1999)An initial study ofthe processing parameters affecting deposition quality ofTi-6AI-4V was conducted using the LENSTM direct laser deposition system. The significant number ofprocess variables presents a problem in determining ... -
Novel Ceramics and Metal-Ceramic Composites via Fused Deposition Process
(1999)Indirect fused·· deposition process is utilized.·.. to ·fabricate controlled porosity ceramic structures using alumina, mullite, zirconia, LSCF-perovskite, tricalcium phosphate and hydroxyapatite, where pore size, pore ... -
Mechanical and Rheological Properties of Feedstock Material for Fused Deposition of Ceramics and Metals (FDC and FDMet) and their Relationship to Process Performance
(1999)Fused deposition of ceramics (FDC) is a solid freeform fabrication technique based on extrusion of a highly loaded thermoplastic binder system. The present FDC process uses filament feedstock of 1.780 mm ± 0.025 mm ... -
Thermo-mechanical Analysis of Parts Fabricated via Fused Deposition Modeling (FDM)
(1999)The quality of Fused Deposition Modeling parts that are built using the standard parallel road approach depends significantly on the orientation of the slices. In this study the expansion coefficient, tensile strength ... -
Maximizing the Strength of Fused-Deposition ABS Plastic Parts
(1999)Fused-Deposition (FD) creates parts using robotic extrusion of set.D.i-liquid .polymer fiber, which molecularly bonds with neighboring fibers via thermal-dlffuslo.n bonding. T~e strength ofthe. part depends on the bulk ... -
Extrusion Freeform Fabrication of Functional Ceramic PrototypeS
(1999)Extrusion Freeforming (EFF) and Fused Deposition Modeling (FDM) processes are established freeforming techniques capable of fabricating complex shaped ceramic prototypes by the sequential deposition and solidification ... -
Processing, Characterization and Modeling of Non-Random Porous Ceramic Structures
(1999)Processing of non-random porous ceramic structures via fused deposition process is discussed. structures are characterized experimentally and statistically based on their compressive strength. Finite element modeling is ... -
Cryogenic Mechanical Alloying of Poly (ether ether ketone) - Polycarbonate Composite Powders for Selective Laser Sintering
(1999)Mechanical alloying is a solid state processing technique traditionally used in the metallurgical industry to extend solubility limits in alloy systems. Mechanical alloying can also be used to blend polymer systems at ... -
Measurement of the Sintering Dynamics of polymeric powders at Near SLS Conditions
(1999)The sintering dynamics of materials used in the Selective Laser Sintering process impact greatly the thermal conditions of the powder bed. An experimental setup was developed to obtain sintering rate information at ... -
Selective Laser Sintering of Zirconia with Micro-Scale Features
(1999)Recent work in Selective Laser Sintering of ceramics at the University of Texas at Austin demonstrates the capability to produce zirconia parts with fine features. Zirconia powder was pre-processed into spherical particles, ... -
Si/SiC-Ceramtc Prototypes via LS2 1 -Process (Liquid Silicon Infiltration of Laser Sintered C-SiC Parts)
(1998)The liquid silicon infiltration of laser sinteredC-~iC parts (LS2 I) is solidfreeform fabrication technique which allows the production of complexshapedSi/SiC prototypes. A mixture of SiC powder and reactive polymer ... -
Direct Laser Fabrication of High Performance Metal Components Via SLS/HIP
(1999)Recent research in the area of direct freeform fabrication of components via selective laser sintering/hot isostatic pressing (SLS/HIP) has focused on the processing of Alloy 625. Alloy 625 is a nickel-based superalloy ... -
Thermal Effects of In-Bed Rapid Prototyping Metastructures
(1999)Iuan effort. t.o produce higher quality Selective Laser Sint.ering (SLS) parts, a number of approaches have been taken. One such approach is t.he use of in-bed·metastructures, such as tortillas and canist.ers. In past. ... -
Residual Stresses in Layered ·Manufacturing
(1999)Layered Manufacturing processes accumulate residual stresses during materialbuildup. These stresses may cause part warping and layer delamination. This paper presents work done on investigating residual stress accumulation ... -
Fractal Growth Modeling of Electrochemical Deposition in Solid Freeform Fabrication
(1999)A new rapid tooling technique ElectroChemical Liquid Deposition Based Solid Freeform Fabrication (ECLD-SFF) was introduced in this paper. In the ECLD-SFF a substrate made of or coated with conductive materials is connected ... -
An Ejection Mechanism Design Method for AIM Tools
(1999)One of the key advantages of AIM tooling is time savings when producing small batch production quality parts. However, designing suitable ejection mechanisms is becoming a bottleneck. There are two goals of this paper. ...
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