Stress induced magnetic field abnormality

来源期刊：中国有色金属学报(英文版)2003年第1期

论文作者：李路明 黄松岭 王晓凤 李双寿 施克仁

文章页码：6 - 9

Key words：magnetic field abnormality; residual stress; geomagnetic field

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 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.