A Process Map for Consistent Build Conditions in the Solid Freeform Fabrication of Thin-Walled Structures

[+] Author and Article Information
Aditad Vasinonta, Jack L. Beuth

Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213

Michelle L. Griffith

Mechanical Process Engineering, Sandia National Laboratories, P.O. Box 5800, MS 0958, Albuquerque, NM 87185

J. Manuf. Sci. Eng 123(4), 615-622 (Aug 01, 2000) (8 pages) doi:10.1115/1.1370497 History: Received December 01, 1999; Revised August 01, 2000
Copyright © 2001 by ASME
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Thin-walled geometry considered in this study
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2-D thermal model and boundary conditions
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Geometry for the analytical model of Rosenthal 26
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Process map assuming temperature-independent properties
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Comparison of normalized results from temperature-dependent simulations for three laser velocities with the Rosenthal solution
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Comparison of results from numerical simulations with a preheated substrate and V=7.62 mm/sec with the Rosenthal solution
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Temperature-dependent results of l̄ vs. h̄ for various values of T̄m for deposition of SS304
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Predicted and measured melt pool lengths as a function of laser power and velocity for no base plate preheating




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