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Article

Mapping Spatial Distribution of Pores in an Additively Manufactured Gold Alloy Using Neutron Microtomography

1
Thermomechanical Metallurgy Laboratory (LMTM)—PX Group Chair, École Polytechnique Fédérale de Lausanne (EPFL), 2002 Neuchâtel, Switzerland
2
Laboratory for Neutron Scattering and Imaging (LNS), Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
*
Authors to whom correspondence should be addressed.
Academic Editor: Wolfgang Treimer
Appl. Sci. 2021, 11(4), 1512; https://doi.org/10.3390/app11041512
Received: 12 January 2021 / Revised: 1 February 2021 / Accepted: 3 February 2021 / Published: 8 February 2021
(This article belongs to the Special Issue Advances in Neutron Imaging)
A crucial criterion for the quality of the additively manufactured parts is the porosity content for achieving an acceptable final relative density. In addition, for jewelry applications, visible pores are unacceptable at or in the vicinity of the surface. In this study, non-destructive 3D neutron microtomography is applied to map the spatial distribution of pores in additively manufactured red-gold samples. The 3D imaging assessment underlines the high relative density of the printed red-gold sample and indicates residual pore sizes are predominantly below the limit of concern for jewelry applications. The 3D maps of pores within printed samples highlight the effect of the scanning strategy on the final quality and location of pores in the printed samples. These results confirm that neutron microtomography is a novel and precise tool to characterize residual porosity in additively manufactured gold alloys and other higher-Z materials where such investigation using other non-destructive methods (such as X-rays) is challenging due to the limited penetration depth. View Full-Text
Keywords: laser powder bed fusion; non-destructive investigations; gold alloy; neutron microtomography; porosity laser powder bed fusion; non-destructive investigations; gold alloy; neutron microtomography; porosity
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MDPI and ACS Style

Ghasemi-Tabasi, H.; Trtik, P.; Jhabvala, J.; Meyer, M.; Carminati, C.; Strobl, M.; Logé, R.E. Mapping Spatial Distribution of Pores in an Additively Manufactured Gold Alloy Using Neutron Microtomography. Appl. Sci. 2021, 11, 1512. https://doi.org/10.3390/app11041512

AMA Style

Ghasemi-Tabasi H, Trtik P, Jhabvala J, Meyer M, Carminati C, Strobl M, Logé RE. Mapping Spatial Distribution of Pores in an Additively Manufactured Gold Alloy Using Neutron Microtomography. Applied Sciences. 2021; 11(4):1512. https://doi.org/10.3390/app11041512

Chicago/Turabian Style

Ghasemi-Tabasi, Hossein, Pavel Trtik, Jamasp Jhabvala, Michael Meyer, Chiara Carminati, Markus Strobl, and Roland E. Logé. 2021. "Mapping Spatial Distribution of Pores in an Additively Manufactured Gold Alloy Using Neutron Microtomography" Applied Sciences 11, no. 4: 1512. https://doi.org/10.3390/app11041512

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