| Stress induced magnetic field abnormality |
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| 作者姓名： | 李路明 黄松岭 王晓凤 李双寿 施克仁 |
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| 作者单位： | [1]DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China [2]FundamentalIndustryTrainingCenter,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | Project( 5 0 0 0 10 0 6 )supportedbytheNationalNaturalScienceFoundationofChina |
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| 摘 要： | Residual stresses in ferromagnetic material affect the direction and structure of domains and generate magnetic field abnormality on the surface.In the formation of stress induced magnetic field,the influence of geomagnetic field is unclear.Residual stress specimen was produced by tight matching of a round ring and a peg.The magnetic fields of contrast specimens,which were produced in geomagnetic field or in shielding geomagnetic field,were ingspected with 8mm lift-off.The results show that mean amplitude of magnetic field of the specimen produced in geomagnetic field is 0.85% larger than that of specimen produced in shielding geomagnetic field.So the formation of stress induced magnetic field abnormality above the surface of inspected ferromagnetic material geomagnetic field gives little contribution.
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| 关 键 词： | 非正态性磁场 残余应力 地磁场 铁磁体 |
Stress induced magnetic field abnormality |
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| LI Lu-ming ,HUANG Song-ling ,WANG Xiao-feng ,LI Shuang-shou ,SHI Ke-ren.Stress induced magnetic field abnormality[J].Transactions of Nonferrous Metals Society of China,2003,13(1):6-9. |
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| Authors: | LI Lu-ming HUANG Song-ling WANG Xiao-feng LI Shuang-shou SHI Ke-ren |
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| Affiliation: | LI Lu-ming 1,HUANG Song-ling 1,WANG Xiao-feng 1,LI Shuang-shou 2,SHI Ke-ren 1 |
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| Abstract: | Residual stresses in ferromagnetic material affect the direction and structure of domains and generate magnetic field abnormality on the surface. In the formation of stress induced magnetic field, the influence of geomagnetic field is unclear. Residual stress specimen was produced by tight matching of a round ring and a peg. The magnetic fields of contrast specimens, which were produced in geomagnetic field or in shielding geomagnetic field, were inspected with 8 mm lift-off. The results show that mean amplitude of magnetic field of the specimen produced in geomagnetic field is 0.85% larger than that of specimen produced in shielding geomagnetic field. So the formation of stress induced magnetic field abnormality above the surface of inspected ferromagnetic material geomagnetic field gives little contribution. |
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| Keywords: | magnetic field abnormality residual stress geomagnetic field |
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