固溶温度对Cu-Zn-Al-Zr合金低频阻尼性能的影响

Effect of Solution Temperature on Damping Capacity of Cu-Zn-Al-Zr Alloy at Low-Frequency

研究了固溶温度（650～900℃）对Cu-Zn-Al-Zr合金低频阻尼性能的影响。结果表明，随固溶温度升高，合金的阻尼性能提高，在800℃达到最大值，对数衰减率6约为0．12；继续升高温度，合金的阻尼性能下降。随应变振幅γmax增大，当γmax〈1．5×10^-4时，阻尼迅速增加；当1．5×10^-4〈γmax〈3×10^-4时，阻尼增加缓慢；当γmax〉3×10^-4时，阻尼趋于稳定。

The effects of solution temperature （650 -900℃ ） on Cu-Zn-Al-Zr alloy damping capacity at low-frequency were studied. The results show that with the increase of solution temperature, the damping capacity of the alloy increases and reaches maximum （logarithmic decrement δ≈0. 12） at 800 ℃, and then decreases. With the increase of strain amplitude γmax, the damping capacity increases sharply when γmax is below 1.5 × 10^-4, then increases slightly when γmax is between 1.5 × 10^-4 and 3 × 10^-4, and becomes stable when γmax is above 3 × 10^-4