| 吴 卿,谭继东,郑 阳,沈功田,周进节.磁晶各向异性材料磁巴克豪森噪声的
非均匀分布特性研究[J].电子测量与仪器学报,2022,36(3):29-37 |
| 磁晶各向异性材料磁巴克豪森噪声的
非均匀分布特性研究 |
| Research on non-uniform distribution characteristics of magneticbarkhausen noise in magnetocrystalline anisotropic material |
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| DOI： |
| 中文关键词: 磁各向异性材料 磁巴克豪森噪声 非均匀分布 |
| 英文关键词:magnetic anisotropy materials magnetic Barkhausen noise non-uniform distribution |
| 基金项目:国家自然科学基金（62071494）、磁巴克豪森噪声平面应力测量方法关键技术研究项目(2021MK172)资助 |
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| 中文摘要: |
| 磁巴克豪森噪声效应可反应铁磁性材料交变励磁时磁畴的动态转动与形变的统计意义特征,从而作为铁磁性材料应力
状态、材质劣化及早期微损伤检测和评估的无损检测技术。 目前针对磁晶各向同性材料的磁巴克豪森噪声检测已获得大量规
律并建立了工程适用方法,但大部分规律和方法在用于磁晶各向异性材料检测时常会产生错误的检测结果或是产生较大误差。
为了探明这种不适用性的原因,搭建了周向磁巴克豪森噪声测量系统,以 X60 钢为例测试磁各向异性分布情况,从易磁化轴方
向、周向磁各向异性图幅值与形状、不同特征参量表征等 3 方面揭示同块材料表面磁晶各向异性分布情况。 研究发现磁晶各向
异性材料上不同位置的周向磁巴克豪森噪声分布是不均匀的,使得基于同种或同批材料试块产生的基准标定曲线用于实际试
件检测时不再具备有效性,这是造成检测错误和误差的关键原因,而以往的研究多认为同块材料上磁晶各向异性分布是一致
的,或忽略了其分布特性的影响。 这种现象的发现对磁晶各向异性材料磁巴克豪森噪声检测提出了新的难题和挑战。 |
| 英文摘要: |
| The magnetic Barkhausen noise effect can reflect the statistical significance of the dynamic rotation and deformation of the
magnetic domains during the alternating excitation of ferromagnetic materials, which can be used as a non-destructive detection
technology for ferromagnetic materials' stress state, material deterioration and early micro-damage detection and evaluation. At present,
the magnetic Barkhausen noise detection for magnetocrystalline isotropic materials has obtained a large number of laws and established
engineering applicable methods, but most of the laws and methods often produce erroneous detection results when used for the detection
of magnetocrystalline anisotropic materials or produce larger errors. In order to find out the reason for this inapplicability, a
circumferential magnetic Barkhausen noise measurement system was built, taking X60 steel as an example to test the distribution of
magnetic anisotropy, the distribution of magnetocrystalline anisotropy on the surface of the same bulk material is revealed from three
aspects: the direction of the easy magnetization axis, the amplitude and shape of the circumferential magnetic anisotropy map, and the
characterization of different characteristic parameters. The study found that the circumferential magnetic Barkhausen noise distribution at
different positions on the magnetocrystalline anisotropic material is not uniform, so that the reference calibration curve generated based on
the test block of the same material or the same batch of material is no longer available for the actual test piece inspection Validity, which
is the key cause of detection biases and errors, and previous studies mostly believed that the magnetocrystalline anisotropy distribution on
the same piece of material was consistent, or the influence of its distribution characteristics was ignored. The discovery of this
phenomenon poses new problems and challenges for the magnetic Barkhausen noise detection of magnetocrystalline anisotropic materials. |
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