A Study of Electromagnetic Acoustic Emission Technology in Non-destructive Testing

Electromagnetic acoustic emission (EMAE), an emerging and highly promising technology, has gained prominence for its ability to provide profound insights into material integrity evaluation while preserving the specimen integrity. Certain scholars have achieved successful detection of defect in aluminum specimens through the utilization of EMAE technology. However, a comprehensive exploration encompassing the principles, developments, advantages, and limitations pertaining to EMAE remains conspicuously absent within the extant literature. To address aforementioned concern, this paper presents a detailed study on the application of EMAE technology in non-destructive testing (NDT). It categorizes the findings on EMAE based on the distinct electromagnetic interaction mechanisms in ferromagnetic and non-ferromagnetic materials. Additionally, it elucidates the potential of EMAE technology in the detection and identification of rail defects.