Ultrasonic guided wave sensing performance of a magnetostrictive transducer using Galfenol flakes-polymer composite patches

• DOI: 10.1063/1.4916811
• Publication Date: 2015-04-06T17:00:18Z
• Authors: Byungseok Yoo; Suok-Min Na; Alison B. Flatau; Darryll J. Pines
• Keywords: Terfenol-D

In this paper, we investigate ultrasonic guided wave (GW) sensing performance of a magnetostrictive composite patch sensor (MCPS) in use structural health monitoring system for metallic plates. A the MCPS consisted powders and binding epoxy, where flake- granular-type Galfenol spherical nickel particles were considered to examine effect particle shape on capability directional sensitivity. flakes with surface parallel (200) crystallographic planes exhibit good field sensitivities magnetic properties when an in-plane is applied. Shape anisotropy disappears conventional shape, accompanying large magnetizing poor The 60-kHz GW was successfully captured by three different MCPSs. Among them, showed best because their excellent magnetization magnetostriction. addition, configured into uniaxial comb promote feature itself. Due unique configuration patch, equivalent presented outstanding sensitivity GWs propagating along orientation fingers.