Low-frequency damping behavior of (Fe83Ga17)97.25Cr2B0.75 sheets

The damping behavior of heat-treated (Fe83Ga17)97.25Cr2B0.75 sheets was studied using a computer-controlled automatic inverted torsion pendulum instruments. The experiments were performed at low frequencies (0.1–11 Hz) and over a wide temperature range (from room temperature to 700 °C). The results show that damping behavior of (Fe83Ga17)97.25Cr2B0.75 alloys is little affected by cooling rate but strongly depends on temperature and frequency. High temperature damping peak, whose value is in the order of 10−2, is observed in all annealed alloys and shifts with frequency. In addition, (Fe83Ga17)97.25Cr2B0.75 alloys show abnormal modulus behavior during the heating process but behave normally during the cooling process. Thus, the damping capacity of Fe–Ga alloys is promising and worth paying close attention to enhance this property so as to achieve access in the field of unwanted noise and vibration reduction applications.