TORSIONAL AND TENSILE-STRESS DEPENDENCE IN AMORPHOUS MAGNETIC WIRES

In this paper we present results concerning the magnetostrictive delay line (MDL) response for positive magnetostrictive wires as well as th e magneto-inductive (MI) response for negative magnetostrictive wires, on the applied torsion and tensile stress. The obtained results show a non-monotonic dependence of the MDL response and a parabolic magneto -inductive response on applied torsion. The tensile stress dependence in MDLs could be fitted by a linear curve for as-cast wires, and by an exponential curve for annealed wires while the MI response could be f itted by a linear curve. Load cells and torque sensors may be realised by using this technique. (C) 1997 Elsevier Science S.A.