铁磁材料不同应变状态下的磁特性实验研究

THE EXPERIMENTAL INVESTIGATION ON MAGNETIC PROPERTY OF FERROMAGNETIC MATERIAL UNDER DEFFERENT RESIDUAL STRAIN

通过实验测量了一种铁磁材料—中碳钢在不同应变状态下的磁滞回线．由此得出矫顽力-应变和剩磁-应变的关系曲线，研究了磁场和应力场对钢铁材料的耦合作用，并对现象作了初步的解释．

For ferromagnetic materials, distinct macro magnetism can be found under the stress ac tion even without the outside magnetic field. It is related to the irreversible change of the magnetic domain caused by the deformation and damage of structures. In this article, medium caxbon steel is tested and the hysteresis loop is achieved. By observing the curve of coercive force versus residual strain and the curve of residual strain versus rema nence) we have studied the coupled function of the strain and magnetic fields of steel and obtained aprimary explanation.