V元素对Fe-16Cr-2.5Mo合金磁机械阻尼的影响

Effect of V Element on the Magnetomechanical Damping of Fe-16Cr-2.5Mo Alloy

本实验制备了四种具有不同V含量(0%、0.05%、0.1%和0.2%,质量分数)的Fe-16Cr-2.5Mo阻尼合金。通过光学显微镜观察其微观结构,并通过倒扭摆内耗仪来测试其阻尼性能。通过XRD在施加饱和磁场条件下测量了Fe-16Cr-2.5Mo合金的饱和磁致伸缩系数,并通过振动样品磁强计测量其磁性能。结果表明,V的添加使Fe-16Cr-2.5Mo基合金的晶胞收缩。同时,V造成的固溶强化和细晶强化使合金的强度和韧性逐渐提高。在外磁场的作用下,V元素的添加导致合金出现负磁致伸缩现象,且随着V浓度的升高,合金的磁致伸缩系数绝对值增大、阻尼性能提高。

In this paper,four Fe-16Cr-2.5Mo damping alloys with different V contents(0%,0.05%,0.1%,and 0.2%)were prepared.The microstructure was observed by an optical microscope,and the damping behavior was measured by an inverted torsion pendulum internal friction apparatus.The saturated magnetostriction coefficient was measured by XRD under the condition of applied saturation magnetic field,and the magnetic properties were measured by a vibration sample magnetometer.We demonstrate that the Fe-16Cr-2.5Mo based alloys’unit cell contracts due to the addition of V element.Meanwhile,the strength and toughness of V-added alloys are improved due to the solid solution strengthening and fine grain strengthening caused by the V addition.In the external magnetic field,the addition of V element results in a negative magnetostriction of the alloys.And as the V concentration increases,the absolute value of the magnetostriction coefficient increases and damping capacity is improved.