EFFECT OF MAGNETIC FIELD ON Fe-Si-Al ALLOY PROPERTIES WITH ZERO MAGNETOSTRICTION

A method and results for a study of the effect of permanent and variable (up to about 1.5 kHz) magnetic fields with intensity H = 0 - 1050 A/m on internal friction Q - 1 and Young's modulus defect Delta E/E in magnetically-soft alloy of the system Fe - Si - Al (sendast type) with mechanical vibration frequency about 10(5) Hz are provided. The range of strain rate amplitudes epsilon(0) within which Q(-1) and Delta E/E are independent of H, and the range where they increase linearly with an increase in epsilon(0) over the whole range of change in H are determined. Results obtained are analyzed within the framework of existing relaxation theory and hysteresis mechanism of elastic vibration damping within magnetically soft materials.