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Main Title: High resolution pore size analysis in metallic powders by X-ray tomography
Author(s): Heim, Korbinian
Bernier, F.
Pelletier, R.
Lefebvre, L.-P.
Type: Article
Language Code: en
Abstract: The 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.
Issue Date: 2016
Date Available: 19-Apr-2018
DDC Class: 670 Industrielle Fertigung
Journal Title: Case Studies in Nondestructive Testing and Evaluation
Publisher: Elsevier BV
Publisher Place: Amsterdam [u.a.]
Volume: 6
Publisher DOI: 10.1016/j.csndt.2016.09.002
Page Start: 45
Page End: 52
ISSN: 2214-6571
Appears in Collections:Inst. Werkstoffwissenschaften und -technologien » Publications

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