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

IF 1.1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Applied Electromagnetics and Mechanics 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

International Journal of Applied Electromagnetics and Mechanics 物理-工程：电子与电气

CiteScore

1.70

自引率

0.00%

发文量

100

审稿时长

4.6 months

期刊介绍： The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are: Physics and mechanics of electromagnetic materials and devices Computational electromagnetics in materials and devices Applications of electromagnetic fields and materials The three interrelated key subjects – electromagnetics, mechanics and materials - include the following aspects: electromagnetic NDE, electromagnetic machines and devices, electromagnetic materials and structures, electromagnetic fluids, magnetoelastic effects and magnetosolid mechanics, magnetic levitations, electromagnetic propulsion, bioelectromagnetics, and inverse problems in electromagnetics. The editorial policy is to combine information and experience from both the latest high technology fields and as well as the well-established technologies within applied electromagnetics.