Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection

Ceramic Matrix Composites (CMC) are promising materials for high-temperature applications where damage tolerant failure behavior is required. Non-destructive testing is essential for process development, monitoring, and quality assessment of CMC parts. Air-coupled ultrasound (ACU) is a fast and cost...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jan Roßdeutscher, Peter Mechnich, Ferdinand Flucht, Yuan Shi, Raouf Jemmali
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	non-destructive testing air-coupled ultrasound testing mechanical testing ceramic-matrix composites Technology T Science Q
Acceso en línea:	https://doaj.org/article/48850bba259a4d6ab65abf149000d115
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:48850bba259a4d6ab65abf149000d115
record_format	dspace
spelling	oai:doaj.org-article:48850bba259a4d6ab65abf149000d1152021-11-25T18:03:09ZMechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection10.3390/jcs51102862504-477Xhttps://doaj.org/article/48850bba259a4d6ab65abf149000d1152021-10-01T00:00:00Zhttps://www.mdpi.com/2504-477X/5/11/286https://doaj.org/toc/2504-477XCeramic Matrix Composites (CMC) are promising materials for high-temperature applications where damage tolerant failure behavior is required. Non-destructive testing is essential for process development, monitoring, and quality assessment of CMC parts. Air-coupled ultrasound (ACU) is a fast and cost-efficient tool for non-destructive inspections of large components with respect to the detection of material inhomogeneities. Even though ACU inspection is usually used for visual inspection, the interpretation of C-scan images is often ambiguous with regard to critical defects and their impact on local material properties. This paper reports on a new approach to link the local acoustic damping of an oxide CMC plate obtained from ACU analysis with subsequent destructive mechanical testing and microstructural analyses. Local damping values of bending bars are extracted from ACU maps and compared with the results of subsequent resonant frequency damping analysis and 3-point bending tests. To support data interpretation, the homogeneous and inhomogeneous CMC areas detected in the ACU map are further analyzed by X-ray computed tomography and scanning electron microscopy. The results provide strong evidence that specific material properties such as Young’s modulus are not predictable from ACU damping maps. However, ACU shows a high, beneficial sensitivity for narrow but large area matrix cracks or delaminations, i.e., local damping is significantly correlated with specific properties such as shear moduli and bending strengths.Jan RoßdeutscherPeter MechnichFerdinand FluchtYuan ShiRaouf JemmaliMDPI AGarticlenon-destructive testingair-coupled ultrasound testingmechanical testingceramic-matrix compositesTechnologyTScienceQENJournal of Composites Science, Vol 5, Iss 286, p 286 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	non-destructive testing air-coupled ultrasound testing mechanical testing ceramic-matrix composites Technology T Science Q
spellingShingle	non-destructive testing air-coupled ultrasound testing mechanical testing ceramic-matrix composites Technology T Science Q Jan Roßdeutscher Peter Mechnich Ferdinand Flucht Yuan Shi Raouf Jemmali Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
description	Ceramic Matrix Composites (CMC) are promising materials for high-temperature applications where damage tolerant failure behavior is required. Non-destructive testing is essential for process development, monitoring, and quality assessment of CMC parts. Air-coupled ultrasound (ACU) is a fast and cost-efficient tool for non-destructive inspections of large components with respect to the detection of material inhomogeneities. Even though ACU inspection is usually used for visual inspection, the interpretation of C-scan images is often ambiguous with regard to critical defects and their impact on local material properties. This paper reports on a new approach to link the local acoustic damping of an oxide CMC plate obtained from ACU analysis with subsequent destructive mechanical testing and microstructural analyses. Local damping values of bending bars are extracted from ACU maps and compared with the results of subsequent resonant frequency damping analysis and 3-point bending tests. To support data interpretation, the homogeneous and inhomogeneous CMC areas detected in the ACU map are further analyzed by X-ray computed tomography and scanning electron microscopy. The results provide strong evidence that specific material properties such as Young’s modulus are not predictable from ACU damping maps. However, ACU shows a high, beneficial sensitivity for narrow but large area matrix cracks or delaminations, i.e., local damping is significantly correlated with specific properties such as shear moduli and bending strengths.
format	article
author	Jan Roßdeutscher Peter Mechnich Ferdinand Flucht Yuan Shi Raouf Jemmali
author_facet	Jan Roßdeutscher Peter Mechnich Ferdinand Flucht Yuan Shi Raouf Jemmali
author_sort	Jan Roßdeutscher
title	Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
title_short	Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
title_full	Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
title_fullStr	Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
title_full_unstemmed	Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection
title_sort	mechanical and microstructural assessment of inhomogeneities in oxide ceramic matrix composites detected by air-coupled ultrasound inspection
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/48850bba259a4d6ab65abf149000d115
work_keys_str_mv	AT janroßdeutscher mechanicalandmicrostructuralassessmentofinhomogeneitiesinoxideceramicmatrixcompositesdetectedbyaircoupledultrasoundinspection AT petermechnich mechanicalandmicrostructuralassessmentofinhomogeneitiesinoxideceramicmatrixcompositesdetectedbyaircoupledultrasoundinspection AT ferdinandflucht mechanicalandmicrostructuralassessmentofinhomogeneitiesinoxideceramicmatrixcompositesdetectedbyaircoupledultrasoundinspection AT yuanshi mechanicalandmicrostructuralassessmentofinhomogeneitiesinoxideceramicmatrixcompositesdetectedbyaircoupledultrasoundinspection AT raoufjemmali mechanicalandmicrostructuralassessmentofinhomogeneitiesinoxideceramicmatrixcompositesdetectedbyaircoupledultrasoundinspection
_version_	1718411676642967552

Mechanical and Microstructural Assessment of Inhomogeneities in Oxide Ceramic Matrix Composites Detected by Air-Coupled Ultrasound Inspection

Ejemplares similares