1995 / Solid Freeform Fabrication Proceedings
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Author Vivek Dave (b), John Matz (a), Thomas Eagar (a), (a) MIT, (b) UTC/Pratt and Whitney
Source Solid Freeform Fabrication Proceedings, 1995, pp 64-71
Abstract A novel method for near-net-shape fabrication of large, complex metal parts without the need for specific tooling is described. Parts are built up in a layer-by-layer fashion by feeding raw material in wire form into a melt pool which is maintained with an electron beam. Several different alloys have been successfully deposited using a low-energy electron beam. A model has been developed which permits determination of the melt depth and vaporization-limited power input as functions of beam energy and travel velocity. Processing parameters obtained from experiments with low-energy electron beams can be used to predict melting behavior under the influence of higher energy beams. The process is being investigated as a possible means for manufacturing compositionally-graded components. (Auth abstract) [References: 2]
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