Mapping the material microstructure of safety critical components using ultrasonic phased arrays
Tant, Katherine M. M. and Galetti, Erica and Mulholland, Anthony J. and Curtis, Andrew and Gachagan, Anthony; (2016) Mapping the material microstructure of safety critical components using ultrasonic phased arrays. In: 2016 IEEE International Ultrasonics Symposium (IUS). IEEE, FRA. ISBN 9781467398978 (https://doi.org/10.1109/ULTSYM.2016.7728756)
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Abstract
Traditional imaging algorithms within the ultrasonic NDE community typically assume that the material being inspected is homogeneous. Obviously, when the medium is of a heterogeneous or anisotropic nature this assumption can contribute to the poor detection, sizing and characterisation of defects. Knowledge of the internal structure and properties of the material would allow corrective measures to be taken. The work presented here endeavours to reconstruct coarsened maps of the locally anisotropic grain structure of industrially representative samples from ultrasonic phased array data. This is achieved via application of the reversible-jump Markov Chain Monte Carlo (rj-MCMC) method: an ensemble approach within a Bayesian framework. The resulting maps are used in conjunction with the total focussing method and the reconstructed flaws are used as a quantitative measure of the success of this methodology. Using full matrix capture data arising from a finite element simulation of a phased array inspection of an austenitic weld, a 71% improvement in flaw location and an 11dB improvement in SNR is achieved using no a priori knowledge of the material's internal structure.
ORCID iDs
Tant, Katherine M. M. ORCID: https://orcid.org/0000-0003-4345-7054, Galetti, Erica, Mulholland, Anthony J. ORCID: https://orcid.org/0000-0002-3626-4556, Curtis, Andrew and Gachagan, Anthony ORCID: https://orcid.org/0000-0002-9728-4120;-
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Item type: Book Section ID code: 58005 Dates: DateEvent18 September 2016Published9 September 2016Accepted4 September 2016SubmittedNotes: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Subjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Science > Mathematics and Statistics
Faculty of Engineering > Electronic and Electrical EngineeringDepositing user: Pure Administrator Date deposited: 03 Oct 2016 10:09 Last modified: 11 Nov 2024 15:06 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/58005