Work

Advances in Rayleigh and shear-horizontal EMAT systems for NDT and SHM: A review

Year: 2026

Type: review

Abstract: This review presents a comprehensive overview of the developments and optimizations of electromagnetic acoustic transducer (EMAT) systems for nondestructive testing (NDT) and structural health monitoring (SHM) in the last two decades. Beginning with an early historical overview, it presents the evolution of EMAT technology through practical applications, advanced signal processing, and hardware innovations. Key design improvements in coil and magnet configurations are discussed in detail, along with the coupling mechanisms responsible for ultrasonic wave generation. The review classifies EMAT systems based on wave modes, including Rayleigh and shear-horizontal (SH) wave modes, and examines representative designs, performance enhancements, and application scenarios. Future directions are outlined, emphasizing hybrid excitation, high-order modes, nonlinear sensing, and intelligent data-driven approaches. This review aims to provide a reference framework for researchers and practitioners seeking to enhance EMAT-based inspection systems for diverse industrial applications.

Source: NDT & E International

DOI: 10.1016/j.ndteint.2026.103677

Authors: Tingyuan Yin, Longxin Zheng, Ching Tai Ng, L.R. Francis Rose, Andrei Kotousov

Institutions: Adelaide University, The University of Adelaide, Defence Science and Technology Group

Language: English

Topic: Ultrasonics and Acoustic Wave Propagation

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,440

Funder: Australian Research Council