High resolution pore size analysis in metallic powders by X-ray tomography

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DOIResolve DOI: http://doi.org/10.1016/j.csndt.2016.09.002
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TypeArticle
Journal titleCase Studies in Nondestructive Testing and Evaluation
ISSN2214-6571
Volume6
IssuePart A
Pages4552
AbstractThe deployment of additive manufacturing processes relies on part quality, specifically the absence of internal defects. Some of those defects have been associated with porosities in the powder feedstock. Since the level of porosity in the powder is generally very low, standard characterisation techniques such as pycnometry and metallography are not suitable for quantification. However, the quantification of such micro sized porosity in metallic powders is crucial to better understand the potential source of internal defects in final components and for quality control purposes. X-ray tomography with a 3 μm resolution offers the possibility to visualise pores in large volume of powder and to quantify their geometrical features and volume fraction using image analysis routines. This combination is unique and demonstrates the power of the approach in comparison to standard powder characterisation techniques. Results presented show the prospects and limits of this technique depending on the imaging device, material and image analysis procedure.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationAutomotive and Surface Transportation; National Research Council Canada
Peer reviewedYes
NPARC number23001724
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Record identifier845e6463-4911-4a0d-83fd-ff5f959ea80d
Record created2017-03-21
Record modified2017-03-24
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