Abstract

Ferromagnetic Fe-Cr alloys can be used to reduce unwanted noise and vibrations because of their high damping capacity which is attributed to the irreversible magnetic domain-wall movement. However, excessive annealing usually causes an obvious drop of damping capacity of the alloys. In the present study, the magnetomechanical hysteresis effect (MMHE) is investigated by measuring magnetostriction coefficients of the annealed Fe-16Cr-2.5 ∼ 3.5Mo alloys. It is found that the annealing more than 1 h at 900℃ causes the attenuation of MMHE. The higher Mo concentration restrains the MMHE attenuation and the damping decline due to the MMHE attenuation. The research could help us to better understand the alloying role in the damping mechanism of Fe-Cr based alloys.

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