A methodology to evaluate the influence of part geometry on residual stresses in selective laser melting

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dc.contributor.authorMugwagwa, L.en_ZA
dc.contributor.authorDimitrov, D.en_ZA
dc.contributor.authorMatope, S.en_ZA
dc.contributor.authorBecker, T. H.en_ZA
dc.date.accessioned2016-07-18T14:21:06Z
dc.date.available2016-07-18T14:21:06Z
dc.date.issued2016
dc.descriptionCITATION: Mugwagwa, L., et al. 2016. A methodology to evaluate the influence of part geometry on residual stresses in selective laser melting. In Competitive Manufacturing, International Conference on Competitive Manufacturing (COMA '16), 27-29 January 2016, Stellenbosch, Stellenbosch University, South Africa.
dc.descriptionThe original publication is available at http://conferences.sun.ac.za/index.php/doie/coma16
dc.description.abstractENGLISH ABSTRACT: The subject of residual stresses induced by the Selective Laser Melting (SLM) process has been one of the main focus areas in literature over the past decade. It has been reported that residual stresses can be responsible for shape and dimensional distortions, cracking and compromised mechanical properties (reduced yield and fatigue strength). These shortfalls limit the applicability of SLM components in industry, particularly for the aerospace industry where part lifetime and hence fatigue life is of utmost concern. High temperature gradients have been reported to be responsible for the residual stress build up. A key aspect that has not been considered in literature is part geometry and orientation and its influence on residual stress levels. Thus, this study proposes a methodology for investigating this influence for different geometric features. In this work, samples were built from tool steel powders. The Hole Drilling Method (HDM) and X-Ray Diffraction (XRD) techniques are proposed for measuring residual stresses. Preliminary results show that the geometry of a part influences residual stress magnitudes and distributions, with sharper ends exhibiting higher stresses than less sharp specimen ends.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Geen opsomming beskikbaaraf_ZA
dc.description.versionPublishers version
dc.format.extent7 pagesen_ZA
dc.identifier.citationMugwagwa, L., et al. 2016. A methodology to evaluate the influence of part geometry on residual stresses in selective laser melting. In Competitive Manufacturing, International Conference on Competitive Manufacturing (COMA '16), 27-29 January 2016, Stellenbosch, Stellenbosch University, South Africa
dc.identifier.issn978-0-7972-1602-0
dc.identifier.urihttp://hdl.handle.net/10019.1/99209
dc.language.isoen_ZAen_ZA
dc.publisherFaculty of Engineering, Department of Industrial Engineering, Stellenbosch Universityen_ZA
dc.rights.holderStellenbosch Universityen_ZA
dc.subjectSelective laser meltingen_ZA
dc.subjectResidual stressesen_ZA
dc.subjectGeometrical constructionsen_ZA
dc.subjectResidual stress measurementen_ZA
dc.titleA methodology to evaluate the influence of part geometry on residual stresses in selective laser meltingen_ZA
dc.typeConference Paperen_ZA
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