Numerical simulation and experimental study on nonlinear ultrasonic characterization of graphite size in nodular cast iron

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2024-09-02 DOI:10.1016/j.apacoust.2024.110265

Yan Tang , Hai Gong , Hanling Mao , Tao Zhang , Yang Li , Junlong Jin

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引用次数: 0

Abstract

Graphite morphology has a significant influence on mechanical properties such as tensile strength and hardness in nodular cast iron (NCI). Compared to the detection of graphite nodularity, there is relatively less ultrasonic simulation and detection experiment research on the graphite size. Therefore, it is of great importance to study rapid nondestructive testing methods for the internal graphite size of NCI. This study establishes a simulation model of nonlinear ultrasonic penetration longitudinal wave detection for graphite size. The acoustic nonlinearity parameter (ANP) is used to characterize the graphite size. Nonlinear ultrasonic detection experiments on the internal graphite size are conducted to verify the reliability of the nonlinear ultrasonic simulation model. The simulation and experimental results show that the ANP of penetrating longitudinal waves decreases with the increase of average graphite diameter. The relationship between ANP and internal graphite size is established. Moreover, the experimental results verified the accuracy of the numerical model. The decrease in ANP may be related to the decrease in the number of grain boundaries. Therefore, the nonlinear ultrasonic technique is an effective method for characterizing the internal graphite size. The establishment of a nonlinear ultrasonic simulation model for graphite size in NCI lays the research foundation for nonlinear ultrasonic microstructure characterization experiments.

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球墨铸铁中石墨尺寸的非线性超声表征的数值模拟和实验研究

石墨形态对球墨铸铁（NCI）的抗拉强度和硬度等机械性能有重要影响。与石墨结晶度检测相比，有关石墨尺寸的超声模拟和检测实验研究相对较少。因此，研究 NCI 内部石墨尺寸的快速无损检测方法具有重要意义。本研究建立了非线性超声穿透纵波检测石墨尺寸的模拟模型。声学非线性参数（ANP）用于表征石墨尺寸。为了验证非线性超声模拟模型的可靠性，对石墨内部尺寸进行了非线性超声检测实验。模拟和实验结果表明，穿透纵波的 ANP 随石墨平均直径的增大而减小。建立了 ANP 与内部石墨尺寸之间的关系。此外，实验结果验证了数值模型的准确性。ANP 的降低可能与晶界数量的减少有关。因此，非线性超声技术是表征内部石墨尺寸的有效方法。NCI 中石墨尺寸的非线性超声模拟模型的建立为非线性超声微结构表征实验奠定了研究基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.