1999 / Solid Freeform Fabrication Proceedings
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Author Melissa Orme (a), Qingbin Liu (a), Robert Smith (a), Charles Huang (a), John Fischer (b), (a) University of California at Irvine, (b) Boeing Commercial Airplane Group
Source Solid Freeform Fabrication Proceedings, 1999, pp 435-442
Abstract High precision droplet-based net-form manufacturing of structural components is gaining considerable academic and industrial interest due to the promise of improved component quality resulting from rapid solidification processing and the economic benefits associated with fabricating a structural component in one integrated operation. In this work circular cylinders that are 35 mm in diameter and up to 11 cm in height are fabricated in their net-form by depositing molten 2024 aluminum alloy droplets onto a flat-plate substrate and building the cylinder layer by layer in the direction of its long axis. Droplets are generated from capillary stream break-up from 150-micron diameter orifices at rates typically on the order of 18,000 droplets/second depending on stream conditions. The mechanical and microstructural characteristics of the net-formed components are studied and their dependence on the processing parameters such as droplet temperature, substrate temperature and mass flow rate delivered to the substrate is ascertained. (Auth abstract) [References: 14]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
or contact:
The University of Texas at Austin
Laboratory for Freeform Fabrication / Texas Materials Institute
Mechanical Engineering Dept.
c/o The Solid Freeform Fabrication Symposium
MC C2200
Austin, TX 78712-1063 USA
512-471-3026; 512-471-7681 FX; Email: sffsymp@uts.cc.utexas.edu