Residual Stress Measurement of Additively Repaired Ti-6Al-4V Using Fibre Optic Sensing

Residual Stress Measurement of Additively Repaired Ti-6Al-4V Using Fibre Optic Sensing

Matthew Stevens, Kieran Pryor, Suzana Turk

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Abstract. Laser metal deposition (LMD) is a laser-based additive manufacturing (AM) technology that offers significant advantages in the production and repair of bespoke and valuable parts targeting applications in the aerospace, tooling and medical industries. A significant problem with AM is the development of high residual stresses, deformation and cracking. Advanced sensing technologies can be a useful tool for characterising residual stress (RS) and the structural response of AM aerospace components under fatigue loading conditions. This paper reports on a feasibility study assessing the performance of fibre optic (FO) distributed strain measurement technology to measure surface RS in comparison to traditional electrical resistance strain gauges and the contour method. The results from this study will be used to justify further experimental work.

Fibre Optics, Distributed Strain Sensing, Continuous Fibre Gratings, Residual Stress, Laser Metal Deposition

Published online 2/20/2021, 8 pages
Copyright © 2021 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Matthew Stevens, Kieran Pryor, Suzana Turk, Residual Stress Measurement of Additively Repaired Ti-6Al-4V Using Fibre Optic Sensing, Materials Research Proceedings, Vol. 18, pp 37-44, 2021


The article was published as article 5 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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