2003 / Solid Freeform Fabrication Proceedings
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Author Andrew Birnbaum, Pruk Aggarangsi and Jack Beuth Department of Mechanical Engineering Carnegie Mellon University Pittsburgh, PA 15213
Source Solid Freeform Fabrication Proceedings, 2003, pp 328-339.
Abstract This modeling research considers two issues related to the control of melt pool size in laser-based additive manufacturing processes. First, the problem of process size scale is considered, with the goal of applying knowledge developed at one processing size scale (e. g. the LENS TM process, using a 500 watt laser) to similar processes operating at larger scales (e. g. a 3 kilowatt system under development at South Dakota School of Mines and Technology) . The second problem considered is the transient behavior of melt pool size due to a step change in laser power or velocity. Its primary application is to dynamic feedback control of melt pool size by thermal imaging techniques, where model results specify power or velocity changes needed to rapidly achieve a desired melt pool size. Both of these issues are addressed via a process map approach developed by the authors and co-workers. This approach collapses results from a large number of simulations over the full range of practical process variables into plots process engineers can easily use. (Auth abstract) [References: 14] XX
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