Detection mechanism of delamination in thermal barrier coatings of turbine blade using a Rayleigh wave EMAT

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-21 DOI:10.3233/jae-230147

Yuange Zhang, C. Pei, Jie Deng, Tianhao Liu, Hong-en Chen, Zhenmao Chen

引用次数: 0

Abstract

Nondestructive testing (NDT) for damage in thermal barrier coatings (TBCs) is significant for the safety guarantee of gas turbine blades. As a new NDT technology, electromagnetic acoustic transducer (EMAT) is widely applied for NDT of conductive structural components due to its advantages of coupling-free and high adaptability. In this paper, numerical simulations are conducted to study the wave propagation and interaction with delamination defects in TBCs inspected with a Rayleigh wave EMAT of the Lorentz force mechanism. Based on the numerical results, the wave structure in TBC, wave conversion at delamination defect, time domain EMAT signals, and its B-scan images are evaluated and the feasibility of Rayleigh wave EMAT to inspect delamination in TBCs was theoretically clarified.

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利用瑞利波 EMAT 检测涡轮叶片隔热涂层的分层机理

热障涂层（TBC）损伤的无损检测（NDT）对燃气轮机叶片的安全保障意义重大。电磁声换能器（EMAT）作为一种新型无损检测技术，具有无耦合、适应性强等优点，被广泛应用于导电结构部件的无损检测。本文使用洛伦兹力机制的瑞利波电磁声传感器对 TBC 中的波传播以及与分层缺陷的相互作用进行了数值模拟研究。基于数值结果，对 TBC 中的波结构、分层缺陷处的波转换、时域 EMAT 信号及其 B-scan 图像进行了评估，并从理论上阐明了瑞利波 EMAT 检测 TBC 分层的可行性。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.