Nowadays, porosity evaluation is a very important part of the production process in the automotive industry and engineering production. The methods used for internal structure evaluation are destructive and non – destructive. One of the most useful non – destructive methods is industrial computed tomography which is based on the application of the X – ray beam in the process of getting data. This method allows evaluation of the external and internal structure from the same data. However, the accuracy of the scan used for porosity evaluation is still in the process of researching. There are not many possibilities for verification of the results because all the analyses are virtual. One of the methods used for results comparison is destructive metallographic cut but it is possible to compare defects only in 2D. Therefore, the idea of creation of the reference sample for porosity evaluation for CT scanning became the aim of this paper.
The milled aluminium alloy sample was created from 4 identical parts with hemispherical artificially created defects. Individual parts, that is parts in disassembled state, were measured using focus variation microscopy. The assembly of 4 pieces in one part was followed by a CT scanning process. Comparison shown that the highest relative differences up to 26% were achieved in evaluation of the smallest pore volumes. The smallest relative differences, approximately 2%, were achieved in evaluation of the biggest defects.
- Computed tomography
- Reference sample for porosity evaluation
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Pokorny, P., Vaclav, S., Petru, J., Kritikos, M.: Porosity Analysis of Additive Manufactured Parts Using CAQ Technology. In Materials, MDPI. Switzerland (2021)
De Chiffre, L., Carmignato, S., Kruth, J.-P., Schmitt, R., Weckenmann, A.: Industrial applications of computed tomography. CIRP Ann. 63(2), 655–677 (2014). https://doi.org/10.1016/j.cirp.2014.05.011
Müller, P., Cantatore, A., Andreasen, J.L., Hiller, J., De Chiffre, L.: Computed tomography as a tool for tolerance verification of industrial parts. In: 12th CIRP Conference on Computer Aided Tolerancing, pp. 125–)132. Elsevier (2013)
Kritikos, M.: Effect of the voxel size on the final scan accuracy in computed tomography. In: Durakbasa, N.M., Gençyılmaz, M.G. (eds.) ISPR -2019. LNME, pp. 422–431. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-31343-2_37
Kritikos, M., Urminsky, J., Buransky, I.: Comparison of optical scanner and computed tomography scan accuracy. In: Durakbasa, N.M., Gençyılmaz, M.G. (eds.) Digitizing Production Systems. LNME, pp. 521–530. Springer, Cham (2022). https://doi.org/10.1007/978-3-030-90421-0_44
Kritikos, M., Kusá, M., Kusý, M.: Evaluation of aluminium alloy (AlSi9Cu3(Fe)) porosity by destructive and non-destructive method (computed tomography). In: Durakbasa, N.M., Gençyılmaz, M.G. (eds.) Digitizing Production Systems. LNME, pp. 181–191. Springer, Cham (2022). https://doi.org/10.1007/978-3-030-90421-0_15
Nicoletto, G., Anzelotti, G., Konečná, R.: X-ray computed tomography vs. metallography for pore sizing and fatigue of cast al-alloys. Procedia Eng. 2(1), 547–554 (2010). https://doi.org/10.1016/j.proeng.2010.03.059
Hermanek, P., Carmignato, S.: PorositymeasurementsbyX-ray computed tomography: Accuracy evaluation using a calibrated object. In: Materials Science Precision Engineering-journal of The International Societies for Precision Engineering and Nanotechnology (2017)
Helmli, F.: Focus variation instruments. In: Optical Measurement of Surface Topography, pp. 146–181. Springer (2011). ISBN 978-3-642-12011-4
Kapłonek, W., Nadolny, K., Królczyk, G.M.: The use of focus-variation microscopy for the assessment of active surfaces of a new generation of coated abrasive tools. Meas. Sci. Rev. 16(2), 42–53 (2016). https://doi.org/10.1515/msr-2016-0007
Alicona: Bruker alicona homepage. https://www.alicona.com/ (2022)
This article was written within the project VEGA 1/0747/19: “Optimization of geometry of cutting tools produced by foundry technology and powder metallurgy to increase durability”.
Acknowledgments also belong to the company Advantage-fl for borrowing the Alicona InfinteFocus SL equipment.
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Kritikos, M., Kusa, M. (2023). Reference Sample for Porosity Evaluation by Non – Destructive Method – Industrial Computed Tomography. In: Durakbasa, N.M., Gençyılmaz, M.G. (eds) Towards Industry 5.0. ISPR 2022. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-24457-5_14
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