The alloy has the highest magnetostriction of any alloy, up to 0.001 m/m at saturation; it expands and contracts in magnetic field. It sees application in magnetomechanical sensors, actuators, and acoustic and ultrasonic transducers, eg. in the SoundBug device (its first commercial application), or in naval sonar systems.
PRC Espionage Leads to `Terf' War: Investigators Say China Placed Students in American Universities to Gain Secret Information about an Exotic Material with Valuable Industrial and Military Uses. (Nation: Military Technology)
Oct 29, 2002; The U.S. Navy spent millions of dollars to develop Terfenol-D in the early 1980s, and intelligence experts estimate that...