ZERO FIELD DAMPING CAPACITY IN (TBXDY1-X)FEY
ZERO FIELD DAMPING CAPACITY IN (TBXDY1-X)FEY
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DOI：
10.1063/1.362074
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发表时间：
1996-04
影响因子：
3.2
通讯作者：
J. Teter;K. Hathaway;A. Clark
中科院分区：
文献类型：
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作者：
J. Teter;K. Hathaway;A. Clark
具有大的耗散机械能的能力的材料对于被动振动阻尼是感兴趣的。通过准静态应力-应变磁滞回线测量了超磁致伸缩铽-镝-铁化合物的零场阻尼性能。的磁化强度和应变的样品进行了测量，增加和减少压缩应力，高达50 MPa。根据应力-应变环计算零场室温阻尼能力（ΔW/W），并绘制最大应力曲线。具有标称Terfenol-D成分的合金的阻尼能力最大值出现在4.1 MPa，值为1.75，对应于Q−1=0.28。在含有Laves相和元素稀土的多相样品（Tb0.6Dy0.4）Fe1.4中，阻尼几乎与应力无关。
Materials with a large capacity to dissipate mechanical energy are of interest for passive vibration damping. We have measured the zero‐field damping capacity of the giant magnetostrictive terbium–dysprosium–iron compounds by quasistatic stress–strain hysteresis loops. The magnetization and strain of the samples were measured for increasing and decreasing compressive stresses, up to 50 MPa. The zero‐field, room temperature damping capacity (ΔW/W) was calculated from the stress–strain loops and is plotted against maximum stress. The damping capacity maximum for the alloy with the nominal Terfenol‐D composition occurs at 4.1 MPa with the value 1.75 which corresponds to Q−1=0.28. The damping is almost independent of stress in a multi‐phase sample, (Tb0.6Dy0.4)Fe1.4, which contains both Laves phase and elemental rare earth.