Investigating the capability of microfocus x-ray computed tomography for areal surface analysis of additively manufactured parts

Andrew Townsend, Liam Blunt, Paul Bills

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The ability to perform non-destructive areal surface analysis, for example of the internal surfaces of additively manufactured (AM) parts has potential advantages during product development and for production process control. This paper reports on the extraction of areal surface information from microfocus x-ray computed tomography (XCT) data. Using this novel technique a range of areal parameter values were generated from a surface section extracted from XCT scan data of an as-built (no post-processing) AlSi10Mg additively manufactured part. This was then compared with the parameter values generated from a focus variation scan of the same surface section. The data comparison method involving normalisation of data format to allow analysis using industry-standard software, such as MountainsMap (Digital Surf, Besançon, France) or SurfStand (The Centre for Precision Technologies UoH) is demonstrated. Importing the extracted surfaces into these powerful software packages allows one-click data filtering per ISO 25178-3 [1] and the generation of a comprehensive suite of areal surface parameter values. These include feature and field parameters, amplitude, spatial, hybrid and functional parameters, as defined in ISO 25178-2 [2]. A method for characterising the capability of XCT for areal surface measurement is demonstrated by comparing results obtained from samples taken from a Rubert comparator test panel, with sample surface Ra values between 0.8 μm and 50 μm.
Original languageEnglish
Title of host publicationProceedings - ASPE/euspen 2016 Summer Topical Meeting: Dimensional Accuracy and Surface Finish in Additive Manufacturing
PublisherAmerican Society for Precision Engineering, ASPE
Pages206-210
Number of pages5
ISBN (Electronic)9781887706711
Publication statusPublished - 2016
EventAmerican Society for Precision Engineering & European Society for Precision Engineering and Nanotechnology: Summer Topical Meeting on Dimensional Accuracy and Surface Finish in Additive Manufacturing - Raleigh, United States
Duration: 27 Jun 201630 Jun 2016
https://www.tib.eu/en/search/id/TIBKAT%3A864328060/ASPE-euspen-2016-Summer-Topical-Meeting-Dimensional/ (Link to Meeting Details )

Conference

ConferenceAmerican Society for Precision Engineering & European Society for Precision Engineering and Nanotechnology
CountryUnited States
CityRaleigh
Period27/06/1630/06/16
Internet address

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    Townsend, A., Blunt, L., & Bills, P. (2016). Investigating the capability of microfocus x-ray computed tomography for areal surface analysis of additively manufactured parts. In Proceedings - ASPE/euspen 2016 Summer Topical Meeting: Dimensional Accuracy and Surface Finish in Additive Manufacturing (pp. 206-210). American Society for Precision Engineering, ASPE.