Elastic Modulus of Fe72.5Ga27.5 Magnetostrictive Alloy

Elastic Modulus of Fe72.5Ga27.5 Magnetostrictive Alloy
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Fe72.5Ga27.5磁致伸缩合金的弹性模量

DOI:
10.1088/0256-307x/27/6/067504
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发表时间:
2010-05
影响因子:
3.5
通讯作者:
Jiang Cheng-Bao
Jiang Cheng-Bao
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhu Xiao-Xi;Liu Jing-Hua;Jiang Cheng-Bao

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通过交流阻抗共振频率测试和第一性原理计算,确定了Fe72.5Ga27.5磁致伸缩合金的弹性模量。所观察到的弹性模量为90.2 GPa的定向凝固的样品和103.4 GPa的水淬样品中测试的直流磁场为32.7 mT,没有压缩预应力。第一性原理计算的体积模量为179.3GPa,与实验结果基本一致。弹性模量随着直流磁场的增加先增大后减小,这是由于Fe72.5Ga27.5合金中发生了磁致伸缩。弹性模量随预紧力的增加而增加,这是由于预紧力作用下初始磁状态发生变化的结果。弹性模量的增加与淬火后磁致伸缩的改善相匹配。
The elastic modulus of Fe72.5Ga27.5 magnetostrictive alloy is determined by testing ac impedance resonance frequency and first-principle calculations. The observed elastic modulus is 90.2 GPa for a directionally solidified sample and 103.4 GPa for a water-quenched sample tested in a dc magnetic field of 32.7 mT without compressive pre-stress. The bulk modulus by first-principles calculation is 179.3 GPa which is basically consistent with the experimental result. The elastic modulus first increases and then decreases with increasing dc magnetic field, attributed to magnetostriction occurrence in the Fe72.5Ga27.5 alloy. The elastic modulus increases with increasing compressive pre-stress, resulting from the initial magnetic states change under the applied compressive pre-stress. The elastic modulus increases match well with the improved magnetostriction after quenching.
DOI: 10.1016/j.actamat.2008.05.011
发表时间: 2008-09
期刊: Acta Materialia
影响因子: 9.4
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