Volume 14, Issue 4 (3-2025)
مهندسی خوردگی 2025, 14(4): 8-8 |
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Investigation of Corrosive Solution
Concentration on SCC of AA7075-T6 Alloy Using Quantitative Methods and Wavelet Transform of Acoustic Emission Signals. مهندسی خوردگی 2025; 14 (4) :8-8
URL: http://journal.ica.ir/article-1-249-en.html
URL: http://journal.ica.ir/article-1-249-en.html
Abstract: (2 Views)
The evaluation and monitoring of stress corrosion cracking (SCC) in metals, particularly in high-strength aluminum alloys, have become increasingly important across various industries due to the growing use of these materials and the severe consequences of SCC failures. In this study, Acoustic Emission (AE) signals were analyzed using the wavelet packet transform (WPT) technique in combination with quantitative and parametric methods to investigate the influence of corrosive solution concentration on the SCC behavior of AA7075-T6 alloy. Time-domain analysis of AE signals revealed a distinct linear relationship between crack growth rate, signal energy, and cumulative counts. This relationship was more pronounced in a HCl33% solution compared to a HCl9% solution, demonstrating clear variations in the corresponding parameters. Furthermore, WPT-based frequency analysis enabled the identification of dominant frequency bands associated with specific AE sources, including bond rupture, microcrack nucleation, and crack propagation. In higher-concentration environments, a greater proportion of signal energy was concentrated in the lower-frequency components. These findings highlight the capability of AE combined with WPT analysis as an effective tool for real-time monitoring and characterization of SCC processes in high-strength aluminum alloys.
Keywords: Stress corrosion cracking, Aluminum alloy, Acoustic emission, Corrosive solution, Wavelet packet transform
Type of Study: Research |
Subject:
General
Received: 2026/01/27 | Accepted: 2025/03/15 | Published: 2025/03/15
Received: 2026/01/27 | Accepted: 2025/03/15 | Published: 2025/03/15
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