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Volumetric assessment of fatigue damage in a SiCf/SiC ceramic matrix composite via in situ X-ray computed tomography

Zak Quiney, Eleri Weston, P. Ian Nicholson, Stephen Pattison, Martin Bache

Journal of the European Ceramic Society, Volume: 40, Issue: 11, Pages: 3788 - 3794

Swansea University Authors: Zak Quiney, Martin Bache

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DOI (Published version): 10.1016/j.jeurceramsoc.2020.04.037

Abstract

To enhance the understanding of matrix cracking and damage progression on the macroscopic scale, within a 0/90° fibre reinforced SiCf/SiC ceramic matrix composite (CMC), X-ray computed tomography (XCT) imaging and analysis have been performed in conjunction with a commercially available in-situ mech...

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Published in: Journal of the European Ceramic Society
ISSN: 0955-2219
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa54217
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Abstract: To enhance the understanding of matrix cracking and damage progression on the macroscopic scale, within a 0/90° fibre reinforced SiCf/SiC ceramic matrix composite (CMC), X-ray computed tomography (XCT) imaging and analysis have been performed in conjunction with a commercially available in-situ mechanical loading device. CMC test coupons were subjected to tensile cyclic loads and inspected using XCT without removal from the tensile loading device. Attempts to measure and quantify the resulting damage using volumetric image analysis techniques are presented, by characterising the crack network from XCT images acquired at both the maximum and minimum load condition during selected fatigue cycles. The XCT detection of significant crack development within the first loading half-cycle shows good agreement with cumulative acoustic emission energy data recorded under similar test conditions. The results are seen as an important step towards correlating the damage behaviour detected via different NDE and health monitoring techniques.
Keywords: Ceramic matrix composites; In-situ X-ray computed tomography; Matrix cracking; Damage accumulation; Fatigue
College: Faculty of Science and Engineering
Issue: 11
Start Page: 3788
End Page: 3794

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