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Areal surface texture data extraction from x-ray computed tomography reconstructions of metal additively manufactured parts

Townsend, Andrew, Pagani, Luca, Scott, Paul J. and Blunt, Liam (2017) Areal surface texture data extraction from x-ray computed tomography reconstructions of metal additively manufactured parts. Precision Engineering, 48. pp. 254-264. ISSN 0141-6359

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Abstract

Many applications that exploit the manufacturing flexibility of additive manufacturing (AM) produce surfaces, primarily internal features, which cannot be measured using conventional contact or line-of-sight optical methods. This paper evaluates the capability of a novel technique to extract areal surface data from micro-focus x-ray computed tomography (XCT) from AM components and then generate surface parameter data per ISO 25178-2. This non-destructive evaluation of internal features has potential advantages during AM product research and commercial production. The data extracted from XCT is compared with data extracted using a focus variation instrument. A reference dimensional artefact is included in all XCT measurements to evaluate XCT surface determination performance and dimensional scaling accuracy. Selected areal parameters generated using the extraction technique are compared, including Sa, for which the nominal difference between the value obtained using XCT and used the focus variation method was less than 2.5%.

Item Type: Article
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
School of Computing and Engineering > Centre for Precision Technologies > EPSRC Centre for Innovative Manufacturing in Advanced Metrology
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Depositing User: Sara Taylor
Date Deposited: 03 Jan 2017 13:58
Last Modified: 23 Feb 2017 13:20
URI: http://eprints.hud.ac.uk/id/eprint/30844

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