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Using laser ultrasound to detect sub-surface defects in metal laser powder bed fusion components

Everton, Sarah K.; Dickens, Phill; Tuck, Christopher; Dutton, Ben

Authors

Sarah K. Everton sarah.everton@nottingham.ac.uk

Phill Dickens

Christopher Tuck

Ben Dutton



Abstract

Laser powder bed fusion offers many advantages over conventional manufacturing methods, such as the integration of multiple parts which can result in significant weight-savings. The increased design freedom that layer-wise manufacture allows has also been seen to enhance component performance at little or no added cost. However, for such benefits to be realised, the material quality must first be assured. Laser ultrasonic testing is a non-contact inspection technique which has been proposed as suitable for in-situ monitoring of metal additive manufacturing processes. This paper explores the current capability of this technique to detect manufactured, sub-surface defects in Ti-6Al-4V samples, ex-situ. The results are compared with x-ray computed tomography reconstructions and focus variation microscopy. Whilst laser ultrasound has been used to identify material discontinuities, further work is required before this technique could be implemented in-situ.

Journal Article Type Article
Journal JOM: the Journal of The Minerals, Metals & Materials Society
Print ISSN 1047-4838
Electronic ISSN 1543-1851
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
APA6 Citation Everton, S. K., Dickens, P., Tuck, C., & Dutton, B. (in press). Using laser ultrasound to detect sub-surface defects in metal laser powder bed fusion components. JOM Journal of the Minerals, Metals and Materials Society, https://doi.org/10.1007/s11837-017-2661-7
DOI https://doi.org/10.1007/s11837-017-2661-7
Publisher URL https://link.springer.com/article/10.1007%2Fs11837-017-2661-7
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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s11837-017-2661-7.pdf (994 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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