| THE NONLINEAR MAGNETOELASTIC PROPERTIES OF 〈 110 〉 ORIENTED TBo.27DYo.73FE1.95 POLYCRYSTALLINE ALLOYS UNDER COUPLED MAGNETOMECHANICAL LOADING |
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| 作者姓名： | Pei Zhao Youhe Zhou Yirui Liang |
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| 作者单位： | Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, and Department of Mechanics and Engineering Sciences, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China |
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| 基金项目： | Project supported by the Fund of Natural Science Foundation of China （Nos. 10972094, 11032006 and 11121202） and the Fundamental Research Funds for the Central Universities （No. lzujbky-2011-146）. |
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| 摘 要： | In the paper, the nonlinear magnetoelastic properties of composition Tb0.27Dy0.73 Fel.95 〈 110 〉 oriented polycrystalline alloys are investigated under coupled loads of high mag- netic field and compressive stress. The magnetization and magnetostriction are measured simul- taneously under applied magnetic field from -800 to 800 kA/m and compressive stress from 0 to 25 MPa at room temperature. The strain coefficient and relative permeability are obtained by differential calculation from the experimental curves. The results show that the values of satura- tion magnetization （M~） under different compressive stresses remain invariably constant in the region of the high magnetic field. The saturation magnetostriction （As） increases with increasing compressive stress and reaches 1680 ~ 10-6 under 25 MPa. According to the increase of the com- pressive stress, the hysteretic loop area of magnetization and magnetostriction increases, while the maximum relative permeability and strain coefficient decrease. Additionally, the influence of the bias magnetic field on the mechanical property is taken into account. The stress-strain relation- ship is nonlinear and sensitive to the applied external magnetic fields along the axis of rod. The results obtained are a useful complement to the existing experiments for theoretical approaches and engineering applications.
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| 关 键 词： | 多晶合金 非线性 磁机械耦合 弹性性质 取向 相对磁导率 加载 磁致伸缩 |
| 收稿时间： | 30 November 2011 |
THE NONLINEAR MAGNETOELASTIC PROPERTIES OF 〈 110 〉 ORIENTED TBo.27DYo.73FE1.95 POLYCRYSTALLINE ALLOYS UNDER COUPLED MAGNETOMECHANICAL LOADING |
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| Pei Zhao,Youhe Zhou,Yirui Liang.THE NONLINEAR MAGNETOELASTIC PROPERTIES OF 〈 110 〉 ORIENTED TBo.27DYo.73FE1.95 POLYCRYSTALLINE ALLOYS UNDER COUPLED MAGNETOMECHANICAL LOADING[J].Acta Mechanica Solida Sinica,2013,26(5):441-447. |
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| Authors: | 《Acta Mechanica Solida Sinica》 |
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| Institution: | 1. Department of Civil Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan;2. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA;1. Laboratoire des Sciences des Procédés et des Matériaux, Paris13 University, LSPM CNRS - UPR3407, 99. Avenue Jean Baptiste Clément, 93430, Villetaneuse, France;2. International Laboratory Multiferr Lab, ITMO University, St. Petersburg, Russia;1. Institute of Physics, Academia Sinica, Taipei, Taiwan, 11529, Taiwan;2. Dept. of Mechanical Engineering, NTUST, Taipei, Taiwan, 106, Taiwan;1. Department of Applied Mathematics, Indian School of Mines, Dhanbad-826004, India;2. Department of Mathematics, Birla Institute of Technology and Science, Pilani, Hyderabad-500078, India |
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| Abstract: | In the paper, the nonlinear magnetoelastic properties of composition Tb0.27Dy0.73Fe1.95 < 110 > oriented polycrystalline alloys are investigated under coupled loads of high magnetic field and compressive stress. The magnetization and magnetostriction are measured simultaneously under applied magnetic field from ?800 to 800 kA/m and compressive stress from 0 to 25 MPa at room temperature. The strain coefficient and relative permeability are obtained by differential calculation from the experimental curves. The results show that the values of saturation magnetization (Ms) under different compressive stresses remain invariably constant in the region of the high magnetic field. The saturation magnetostriction (λs) increases with increasing compressive stress and reaches 1680 × 10?6 under 25 MPa. According to the increase of the compressive stress, the hysteretic loop area of magnetization and magnetostriction increases, while the maximum relative permeability and strain coefficient decrease. Additionally, the influence of the bias magnetic field on the mechanical property is taken into account. The stress-strain relationship is nonlinear and sensitive to the applied external magnetic fields along the axis of rod. The results obtained are a useful complement to the existing experiments for theoretical approaches and engineering applications. |
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| Keywords: | TbDyFe alloys magnetomechanical loading magnetization magnetostriction stress-strain relationship |
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