1998 / Solid Freeform Fabrication Proceedings
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Author N. P. Karapatis, Y. Guidoux, P. E. Gygax, R. Glardon, Swiss Federal Institute of Technology
Source Solid Freeform Fabrication Proceedings, 1998, pp 79-88
Abstract The Direct Metal Laser Sintering (DMLS) manufacturing technique induces thermal stresses in parts. When such parts are used at elevated temperatures, residual stresses are relaxed and the part can suffer significant distortion. This study presents values of geometrical distortion for two laser exposure strategies and for different heat treatment temperatures and durations. Surface and bulk hardness data are provided as well as porosity measurements. At temperatures above 300 deg C, the geometrical changes become important. A stabilization treatment at 600 deg C can help reduce distortions. (Auth abstract) [References: 3]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
or contact:
The University of Texas at Austin
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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