Evaluation of Microstructure and Material Properties by Nondestructive Testing Methods Using Eddy Currents

Abstract

Electromagnetic nondestructive testing, especially eddy current testing (ECT), has been extensively used to detect and evaluate damage such as surface defects in materials. Recently, ECT has attracted attention as a method for nondestructively analyzing the microstructures and properties of materials based on the fact that the obtained signal is dependent on the material properties and the presence of defects. Therefore, this review focuses on research mainly conducted by our group on nondestructive testing using eddy currents.