Using acoustic emission and fractography to evaluate defects induced by corrosive environment

Hrairi, Meftah (2009) Using acoustic emission and fractography to evaluate defects induced by corrosive environment. Corrosion Engineering, Science and Technology, 44 (4). pp. 251-260. ISSN 1743-2782 (O), 1478-422X (P)

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Abstract

Acoustic emission (AE) is now a well established technique for damage detection, quantification and location in large structures. It appears in its principle as a technique providing real time information about the origins and the importance of the degradation mechanisms inside the material. This paper demonstrates the use of AE technique to monitor the structural damage using data obtained from a phenomenological study of hydrogen induced cracking of a low alloy steel pressure vessel. In addition to the feature extraction, correlation and clustering procedures applied to the AE signals, data were studied in time and frequency domain to characterise and to find out the relation between AE parameter and damage sources. Moreover, the characterisation of the corrosive mechanisms using the optical microscopy as well as the scanning electron microscopy was carried out. These identified corrosive mechanisms and the sources of generated AE signals were discussed.

Item Type:	Article (Journal)
Additional Information:	4980/6539
Uncontrolled Keywords:	corrosion monitoring, stress corrosion cracking, acoustic emission, hydrogen embrittlement, fractography
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Meftah Hrairi
Date Deposited:	24 Nov 2011 10:09
Last Modified:	24 Nov 2011 10:09
URI:	http://irep.iium.edu.my/id/eprint/6539

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