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Characterisation of the topography of metal additive surface features with different measurement technologies

Senin, Nicola; Thompson, Adam; Leach, Richard K.

Authors

Nicola Senin

Adam Thompson

Richard K. Leach



Abstract

© 2017 IOP Publishing Ltd. The challenges of measuring the surface topography of metallic surfaces produced by additive manufacturing are investigated. The differences between measurements made using various optical and non-optical technologies, including confocal and focus-variation microscopy, coherence scanning interferometry and x-ray computed tomography, are examined. As opposed to concentrating on differences which may arise through computing surface texture parameters from measured topography datasets, a comparative analysis is performed focussing on investigation of the quality of the topographic reconstruction of a series of surface features. The investigation is carried out by considering the typical surface features of a metal powder-bed fusion process: weld tracks, weld ripples, attached particles and surface recesses. Results show that no single measurement technology provides a completely reliable rendition of the topographic features that characterise the metal powder-bed fusion process. However, through analysis of measurement discrepancies, light can be shed on where instruments are more susceptible to error, and why differences between measurements occur. The results presented in this work increase the understanding of the behaviour and performance of areal topography measurement, and thus promote the development of improved surface characterisation pipelines.

Journal Article Type Article
Publication Date Aug 16, 2017
Journal Measurement Science and Technology
Print ISSN 0957-0233
Electronic ISSN 1361-6501
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 28
Issue 9
Article Number 095003
APA6 Citation Leach, R. K., Senin, N., Thompson, A., & Leach, R. K. (2017). Characterisation of the topography of metal additive surface features with different measurement technologies. Measurement Science and Technology, 28(9), https://doi.org/10.1088/1361-6501/aa7ce2
DOI https://doi.org/10.1088/1361-6501/aa7ce2
Keywords Surface metrology; Three dimensional topographic features; Additive manufacturing; Metal powder-bed fusion
Publisher URL https://doi.org/10.1088/1361-6501/aa7ce2
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Journal title: Measurement Science and Technology; Article type: paper; Article title: Characterisation of the topography of metal additive surface features with different measurement technologies; Copyright information: © 2017 IOP Publishing Ltd; Date received: 2017-05-11; Date accepted: 2017-06-30; Online publication date: 2017-08-16

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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