Contact and Non-Contact Acoustic Methods to Assess Volumetric Porosity in Metal 3D Printed Parts
Research and Review Journal of Nondestructive Testing. Vol.1: Papers of the ECNDT 2023 (ECNDT 2023) 2023
Aleksejs Tatarinovs, Alexey Nikolas, Vladimir Nikulenkov, Vjačeslavs Zemčenkovs, Jekaterina Ņikitina, Viktors Mironovs

Volumetric porosity as a common defect in metal 3D printing (3DP) that can significantly impede the mechanical properties of products. Traditional methods of porosity control (microscopy) and non-destructive testing (computed tomography) usually are not applicable at the production site. In this study, sensitivity of three examined testing modalities based on acoustic methods and vibration analysis to changes in the volumetric porosity of 3DP parts was examined. Test objects were cylindrical specimens made of AlMg powder by 3DP with a gradually dosed porosity from 0.5 to 4.0%. Ultrasonic testing by through transmission showed the best accuracy using ultrasound velocity and pulse intensity parameters. Shifts of resonant frequency and spectral density and appearance of side harmonics were the manifestations of increased porosity using vibration approaches. The method comprising a loudspeaker as a vibration exciter and an optoelectronic device for remote sensing of vibration is the most attractive from the point of view of application to objects of complex geometry.


Keywords
porosity, vibration analysis
DOI
10.58286/28102
Hyperlink
https://www.ndt.net/search/docs.php3?id=28102

Tatarinovs, A., Nikolas, A., Nikulenkov, V., Zemčenkovs, V., Kuzmina, J., Mironovs, V. Contact and Non-Contact Acoustic Methods to Assess Volumetric Porosity in Metal 3D Printed Parts. Research and Review Journal of Nondestructive Testing, 2023, Vol. 1, pp.1-6. ISSN 2941-4989. Available from: doi:10.58286/28102

Publication language
English (en)
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