铁磁性形状记忆合金Ni50Ga27Fe17Co6的阻尼性能

铁磁性形状记忆合金Ni₅₀Ga₂₇Fe₁₇Co₆的阻尼性能

摘要: 采用低频扭摆仪研究了铁磁性形状记忆合金Ni50Ga27Fe17Co6的阻尼性能与应变振幅、频率及温度的关系.结果表明:当应变振幅小于7.5×10-5时,Ni50Ga27Fe17Co6合金的阻尼性能主要取决于频率,当应变振幅大于7.5×10-5时,其阻尼性能主要取决于应变振幅;当该合金处于马氏体相和奥氏体相共存时具有高阻尼性能,当应变振幅为5×10-5,频率为0.1 Hz时,合金最大阻尼值为0.11.

Abstract: The correlations between damping capacity and strain amplitude,frequency and temperature of the Ni50Ga27Fe17Co6 ferromagnetic shape memory alloy (FSMA) were investigated using low frequency torsion pendulum.The results show that when the strain amplitude was smaller than 7.5×10-5 the damping capacity of the Ni50Ga27Fe17Co6 alloy was determined by frequency,when the strain amplitude was larger than 7.5×10-5 it was determined by strain amplitude.The prepared alloy had high damping capacity with a maximum value of 0.11 as the two phases of marternsite and austenite coexisting with the strain complitude of 5×10-5 and the frequency of 0.1 Hz.