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Russian Journal of Nondestructive Testing
Erschienen in: Russian Journal of Nondestructive Testing 4/2021

01.04.2021 | ACOUSTIC METHODS

Volume Fraction Detection of Long Period Stacking Ordered Phases in Mg Alloys Based on Dual-Tree Complex Wavelet Packet Transform

verfasst von: Xianghong Wang, Sheng Yang, Xiaojie Zhou, Hongwei Hu

Erschienen in: Russian Journal of Nondestructive Testing | Ausgabe 4/2021

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Abstract

The existence of long period stacking ordered (LPSO) strengthening phases greatly improves the mechanical properties of Mg alloys, such as tensile strength, compressive strength and ductility. Therefore, volume fraction detection of LPSO phases plays an important role in understanding the properties of the alloy. Aiming at the traditional volume fraction detection of LPSO phases in Mg alloys destroys the tested material, a nondestructive testing method based on acoustic attenuation signal is proposed. In order to improve the sensitivity of the signal to the LPSO phases content, the dual-tree complex wavelet packet transform (DTCWPT) is used to extract the feature frequency band. Regarding Mg alloys with different volume fractions of LPSO phases as the research specimens, the feature frequency bands are extracted by DTCWPT. The fitting equation between the energy attenuation coefficient of the feature frequency band signal and the volume fraction of LPSO phases is established, and is used to calculate the LPSO phases content of the testing specimen. The results show that the proposed method is able to reliably calculate the volume fraction of LPSO phases, the absolute error of the phases volume fraction of testing specimens are 2.5 and 3.1%, which are 1.2 and 0.8% less than the absolute error 3.7 and 3.9% calculated by WPT method, and also 2.3 and 1.6% less than the absolute error 4.8 and 4.7% calculated by the original signal. Therefore, the volume fraction detection method of LPSO phases based on DTCWPT is a better method, which opens up a new nondestructive detection method of volume fraction of LPSO phases in Mg alloys.
Vorheriger Artikel Investigation of the Performance of a Piezoelectric Ultrasonic Transducer by Finite Element Modeling
Nächster Artikel One Approach to the Numerical Solution of the Basic Equation of Magnetostatics for a Finite Cylinder in an Arbitrary External Field

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Metadaten
Titel
Volume Fraction Detection of Long Period Stacking Ordered Phases in Mg Alloys Based on Dual-Tree Complex Wavelet Packet Transform
verfasst von
Xianghong Wang
Sheng Yang
Xiaojie Zhou
Hongwei Hu
Publikationsdatum
01.04.2021
Verlag
Pleiades Publishing
Erschienen in
Russian Journal of Nondestructive Testing / Ausgabe 4/2021
Print ISSN: 1061-8309
Elektronische ISSN: 1608-3385
DOI
https://doi.org/10.1134/S1061830921040100

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