Journal
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
Volume 48, Issue -, Pages 254-264Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.precisioneng.2016.12.008
Keywords
Metal additive manufacturing; ISO 25178; Areal surface texture; X-ray computed tomography; Metrology; Internal surfaces
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Funding
- EPSRC Centre for Innovative Manufacturing in Advanced Metrology [EP/1033424/1]
- Engineering and Physical Sciences Research Council [EP/K037374/1, EP/P006930/1, EP/I033424/1] Funding Source: researchfish
- EPSRC [EP/P006930/1, EP/K037374/1, EP/I033424/1] Funding Source: UKRI
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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%. (C) 2016 The Authors. Published by Elsevier Inc.
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