| 铁磁材料磁力学声发射的频谱特征 |
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| 引用本文： | 肖建中,马咸尧,朱孝谦.铁磁材料磁力学声发射的频谱特征[J].华中科技大学学报(自然科学版),1993(Z1). |
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| 作者姓名： | 肖建中 马咸尧 朱孝谦 |
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| 作者单位： | 华中理工大学机械工程二系
(肖建中，马咸尧)，华中理工大学机械工程二系(朱孝谦) |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 研究了三种不同材料在不同应力下的磁力学声发射频谱特征,发现变化磁场对磁力学声发射波形的作用.通过对波形主频率及频带宽度的比较,发现材料内部应力状态与磁力学声发射的频谱有密切关系.
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| 关 键 词： | 磁力学声发射 频谱分析 残余应力 |
MAE Spectrum Characteristics of Ferromagnetic Materials |
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| Xiao Jianzhong Ma Xianyao Zhu Xiaoqian.MAE Spectrum Characteristics of Ferromagnetic Materials[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1993(Z1). |
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| Authors: | Xiao Jianzhong Ma Xianyao Zhu Xiaoqian |
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| Institution: | Xiao Jianzhong Ma Xianyao Zhu Xiaoqian |
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| Abstract: | The MAE (Magnetomechanical Acoustic Emissi on) is a kind of elastic wave induced by the irreversible movement of domain wall under the action of an externally applied alternating magnetic field. The MAE signal intensity depends heavily on the residual stress in materials. The MAE spectrum characteristics of three different materials have been studied in two types of stress state. It has been found that the MAE waveform and its frequency are affected by the external field intensity, residual stress and stress distribution in materials. The acoustic power spectrum density of MAE are quite different for different microstructures of materials. The more pearlite and Fe3C there are, the lower the MAE signal intensity will be. |
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| Keywords: | MAE spectrum analysis residual stress |
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