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Residual Stresses Induced by Laser FreeForm Fabrication

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Abstract:

In this paper we report our attempts to use the neutron and X-ray diffraction techniques to characterize residual stresses in specimens manufactured by laser FreeForm technique. The aim of our work has been to understand how residua stresses develop during forming and their possible correlation with the microstructure, in particular the pore density which varies with the laser scan speed. The specimens under investigation were built by layer-sintering a ferritic-steel powder with a Cu-based-alloy powder as the binder material. Limited results have been obtained for the ferrite steel phase and are presented in the paper.

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Periodical:

Materials Science Forum (Volumes 490-491)

Pages:

334-339

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.490-491.334

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Online since:

July 2005

Authors:

Ru Lin Peng, Sten Å.H. Johansson, Torsten Ericsson, Lena Thorsson

Keywords:

Neutron Diffraction, Residual Stress, Selective Laser Sintering (SLS), Steel, X-Ray Diffraction (XRD)

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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