MAGNETOMECHANICAL SENSOR ATTACHMENT METHOD

Abstract

A method of measuring strain in material by (1) selecting a metallic glass ribbon of the composition Fe.sub.w B.sub.x Si.sub.y C.sub.z wherein 0.70≦w≦0.83, 0.10≦x≦0.20, 0.03≦y≦0.10, 0≦z≦0.03, and w+x+y+z=1.00 wherein the metallic glass ribbon is essentially strain free and has easyxes of magnetization which are in the plane of the ribbon transverse (at 90°) to the long axis of the ribbon; (2) bonding the metallic glass ribbon to material to be measured by means of a homogeneous viscous organic liquid having a viscosity greater than 105 cp at 25° C.; (3) allowing the viscous liquid to relax until the metallic glass ribbon is not stressed by the viscous liquid and is in a state of constant strain within it magnetostrictive dynamic range; and (4) measuring the susceptibility of the metallic glass ribbon which is directly proportional to strain within the material being measured.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1ARTHUR E. CLARK