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Structural Engineering and Mechanics Volume 75, Number 6, September25 2020 , pages 723-736 DOI: https://doi.org/10.12989/sem.2020.75.6.723 |
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Acoustic emission technique to identify stress corrosion cracking damage |
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V. Soltangharaei, J.W. Hill, Li Ai, R. Anay, B. Greer, M. Bayat and P. Ziehl
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| Abstract | ||
| In this paper, acoustic emission (AE) and pattern recognition are utilized to identify the AE signal signatures caused by propagation of stress corrosion cracking (SCC) in a 304 stainless steel plate. The surface of the plate is under almost uniform tensile stress at a notch. A corrosive environment is provided by exposing the notch to a solution of 1% Potassium Tetrathionate by weight. The Global b-value indicated an occurrence of the first visible crack and damage stages during the SCC. Furthermore, a method based on linear regression has been developed for damage identification using AE data. | ||
| Key Words | ||
| acoustic emission; damage identification; global b-value; pattern recognition; stress corrosion cracking | ||
| Address | ||
| V. Soltangharaei, J.W. Hill, Li Ai, R. Anay, M. Bayat and P. Ziehl: Department of Civil and Environmental Engineering, University of South Carolina, Columbia, SC, USA B. Greer: Senior Technical Leader, Electrical Power Research Institute, USA | ||