Micro-scale finishing of the surface and form of a Ti-6Al-4V lightweight rotor obtained by laser powder bed fusion used for air bearing

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dc.contributor.authorSanz, Claude
dc.contributor.authorGerard, Romain
dc.contributor.authorMorantz, Paul
dc.contributor.authorChérif, Ahmed
dc.contributor.authorShore, Paul
dc.contributor.authorMainaud-Durand, Hélène
dc.contributor.authorLunt, Alexander J. G.
dc.date.accessioned2018-12-17T10:03:10Z
dc.date.available2018-12-17T10:03:10Z
dc.date.issued2018-07-26
dc.description.abstractThe European Organisation for Nuclear Research, CERN, is in the process of designing and testing parts for the next generation of linear accelerators. In order to operate the experiments, the pre-alignment precision of the components of the two opposing accelerating complexes has placed increased demands on part tolerances, which are now approaching the micrometre. In order to meet these demanding requirements, improvements are necessary to the build processes, machining parameters and post-manufacture characterisation stages. One of the most promising methods for the production of these parts is Laser Powder Bed Fusion, and as such, this paper focuses on the manufacture of the lightweight air bearing rotor component and the micro-scale tolerance machining required by this part. The results demonstrate that despite being able to initially machine the part to a form tolerance approaching 2 μm, subsequent notch cutting and the release of residual stresses from the part obtained by Laser Powder Bed Fusion induces an 18 μm part misalignment which is larger than the tolerance limits of 5 μm required for operation. This demonstrates that further minimisation and understanding of the residual stresses induced during machining are required to facilitate the effective manufacture of high precision components of this type.en_UK
dc.identifier.citationClaude Sanz, Romain Gerard, Paul Morantz, et al., Micro-scale finishing of the surface and form of a Ti-6Al-4V lightweight rotor obtained by laser powder bed fusion used for air bearing. Additive Manufacturing, Volume 23, October 2018, Pages 287-293en_UK
dc.identifier.issn2214-8604
dc.identifier.urihttps://doi.org/10.1016/j.addma.2018.05.033
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13739
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectPrecision machiningen_UK
dc.subjectMicroscale tolerancesen_UK
dc.subjectResidual stressen_UK
dc.subjectSelective laser meltingen_UK
dc.subjectLightweight air bearingen_UK
dc.titleMicro-scale finishing of the surface and form of a Ti-6Al-4V lightweight rotor obtained by laser powder bed fusion used for air bearingen_UK
dc.typeArticleen_UK

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