Title: Assessing and comparing influencing factors of residual stresses in Selective Laser Melting using a novel analysis method
Authors: Kruth, Jean-Pierre
Deckers, Jan ×
Yasa, Evren
Wauthlé, Ruben #
Issue Date: Jun-2012
Publisher: Mechanical Engineering Publications Ltd.
Series Title: Proceedings of the Institution of Mechanical Engineers B, Journal of Engineering Manufacture vol:226 issue:6 pages:980-991
Abstract: During Selective Laser Melting, the irradiated material experiences large temperature fluctuations in a short time which causes unwanted thermal stresses. In order to assess thermal stresses in a simple and fast way a new pragmatic method is developed, namely the Bridge Curvature Method (BCM). The BCM is used to assess and qualitatively compare the influence of different laser scan patterns, laser parameter settings and more fundamental process changes on residual stresses. The results from the experiments as well as the findings from literature lead to two general conclusions: changes which reduce the high temperature gradient, like using short scan vectors and preheating of the base plate, reduce the thermal stresses. And, thermal stresses in a particular direction can be reduced by optimal choice of the orientation of scan vectors. The experiments indicate the reliability of the Bridge Curvature Method. Statistical analysis is used to check the repeatability of the method and to quantify the uncertainties during measurement.
ISSN: 0954-4054
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
Orthopaedics Section (-)
× corresponding author
# (joint) last author

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