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NDT.net Issue - 2017-03 - Articles
NDT.net Issue: 2017-03
Publication: 7th Conference on Industrial Computed Tomography (iCT) 2017, 7-9 Feb, Leuven, Belgium (iCT 2017)
Session: Materials Characterization
ARTICLE

Multi-modal Talbot-Lau grating interferometer data for the characterization of fibre reinforced polymers with metal components

Christian Gusenbauer132, Michael Reiter129, Bernhard Plank149, Sascha Senck124, Christian Hannesschläger16, Stefanie Renner2, Rolf Kaufmann39, Johann Kastner1124
1Upper Austrian University of Applied Sciences (FH OÖ)172, Wels, Austria
2Fischer Advanced Composite Components (FACC)15, Ried, Austria
3Empa, Swiss Federal Laboratories for Materials Science and Technology96, Dübendorf, Switzerland

Abstract: In this paper we present multi-modal image data acquired by Talbot-Lau grating interferometer µXCT (Talbot-Lau µXCT) and conventional µXCT devices. Samples are made of carbon fibre reinforced polymers (CFRP) with a copper mesh near the surface for lightning conduction. The inspection task includes the detection and characterization of internal defects such as pores. We show that the differential phase contrast (DPC) modality is less prone to metal streak artefacts, thus improving the detection of pores in CFRP located close to metal components. In addition, DPC shows an increased contrast between pores and CFRP matrix. A comparison to a conventional µXCT system with higher spectral energy and to another laboratory Talbot-Lau system with more degrees of freedom is performed. Furthermore, image quality measures are applied to evaluate different spectral data, image fusion concepts are presented for individual inspection tasks and metal artefact corrected data is compared to raw data input as well as DPC reference data.

Keywords: materials characterization (653), Computed Tomography (293), Phase contrast (25), Carbon fibre reinforced polymers (2), Talbot-Lau XCT, grating interferometer (2), multi-modal, metal artefacts,
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.

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