Magnetostriction and texture relationships in annealed galfenol alloys

Abstract

An investigation into the relationship between the measured bulk magnetostriction in rolled galfenol alloy sheet and the measured texture components was conducted. Galfenol rolled sheet was prepared using different texture annealing parameters such as temperature (1000-1300 °C), cooling rate, and dwell time (1-24 h), with their saturation magnetostrictions measured, followed by electron backscattered diffraction to determine the degree of texture that each sample possessed. The dominate orientation in all samples analyzed was the { 011 } 〈 100 〉, along the desired -fiber. Measurement results indicate that as the -fiber texture improves the bulk magnetostriction increases in a linear fashion with a maximum strain value of 154 ppm measured for sheet samples containing 45 area % -fiber texture. © 2009 American Institute of Physics.