Nondestructive evaluation of spheroidization grades based on entropy characteristic parameters method

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-02-18 DOI:10.1016/j.apacoust.2025.110599

Jinlong Li , Zenghua Liu , Zongjian Zhang , Yang Zheng , Cunfu He

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引用次数: 0

Abstract

Due to its excellent mechanical properties, 15CrMo steel is widely used in critical components exposed for high-temperature and high-pressure conditions. Long term high-temperature will increase the spheroidization possibility and even cause serious safety accidents. However, characterization of the spheroidization grades is a very difficult problem. To quantitatively evaluate the spheroidization grades of 15CrMo steel, destructive testing methods are used to determine spheroidization grades. This study uses the ultrasonic backscattering method to detect the spheroidization grades. The ultrasonic testing platform collects the backscattering signals, and the typical characteristic parameters and entropy characteristic parameters of the backscattering signals are extracted. New entropy characteristic parameters, including the information entropy, conditional entropy, sample entropy, fuzzy entropy, permutation entropy, approximate entropy, power spectral entropy, and singular spectrum entropy, are introduced to evaluate the spheroidization grades of 15CrMo steel. It is found that the proposed entropy characteristic parameters can reflect the changes in the microstructure under different spheroidization grades. Therefore, the entropy characteristic parameters of ultrasonic backscattering signals are advantageous for evaluating the spheroidization grades of 15CrMo steel.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.