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NDT.net Issue - 2019-03 - Articles
NDT.net Issue: 2019-03
Publication: 9th Conference on Industrial Computed Tomography (iCT) 2019, 13-15 Feb, Padova, Italy (iCT 2019)
Session: NDT, Materials & Manufacturing
Fri 13:50 Auditorium
ARTICLE

Combining a Computed Laminography Approach with Tomographic Analysis for a Study of Weld Joints

Marius Costin13, Caroline Vienne12, Jérôme Garnier
aLIST/DISC bDEN, DMN/SRMA; Commissariat Energie Atomique (CEA)295, Gif-Sur-Yvette, France

Abstract: The quality of a weld joint is subject to several factors, from material characteristics to environmental conditions. Its mechanical behavior is a broad field of study with specific industrial standards. Within a study of a weld joint, we employed a combination of a computed laminography [1] approach with tomographic analysis in order to extract and analyze specimens that were afterwards tested to assess the welding stress-strain and fracture characteristics. The main objective was to study the effect of surface porosity-type flaws. For this purpose, instead of a blind extraction of specimens from a welded block, we proceeded to a pre-identification of large porosity defects and the specimens were then cut and machined such that the flaws would be situated on the surface of test samples. The positions of these flaws were extracted with the laminography approach and it was crosschecked with measurements with an ultrasound testing technique. Computed tomography was employed as a characterization step before the stress-strain and fracture tests.

Keywords: weld inspection (19), X-ray CT (20), Computed laminography (7),
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.

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