A Simulation Method of Magnetic Barkhausen Noise Signal in Stressed Dual-Phase Ferromagnetic Materials
A noise signal, ferromagnetic material technology, applied in the direction of magnetic performance measurement, etc., can solve the lack of a reasonable simulation method for the magnetic Barkhausen noise signal of two-phase ferromagnetic materials containing stress, cannot consider microscopic characteristic information, and cannot consider two single phases issues of relationship
Active Publication Date: 2022-05-03
BEIJING UNIV OF TECH
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[0003] At present, most of the simulation methods for the magnetic Barkhausen noise signal of stress-containing dual-phase ferromagnetic materials are realized by using the macroscopic hysteresis model combined with the linear superposition method, but this method cannot consider the microscopic characteristic information, nor can it consider the relationship between the two single phases.
Therefore, there is still a lack of a reasonable simulation method for the magnetic Barkhausen noise signal of stressed dual-phase ferromagnetic materials
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[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments of the present invention.
[0030] The invention provides a method for simulating a magnetic Barkhausen noise signal in a stress-containing dual-phase ferromagnetic material. The modeling method includes the following steps:
[0031] S1: In the magnetic Barkhausen noise simulation method for dual-phase ferromagnetic materials with stress, the spin plane in the Ising model is divided into equal-sized grids. Taking the two-dimensional 20×20 spin plane as an example, it is divided into 25 4×4 sub-spin planes, in which the spin interaction coefficient is set to J in randomly selected Q sub-spin planes 1 =0.5, the spin interaction coefficients in the other 25-Q sub-spin planes are set to J 2 =0.9, where Q is taken as 1, 2 and 3 respectively, and the corre...
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The invention discloses a method for simulating magnetic Barkhausen noise signals in stress-containing dual-phase ferromagnetic materials. The spin plane in the Ising model is grid-divided, and different sub-spin plane grids are carried out after division. Model parameter assignments to simulate the different magnetic properties that the two components have. The ratio of the number of grids occupied by each of the two components can be adjusted to simulate changes in the proportion of the components. The Monte Carlo algorithm is used to solve the Ising model, and the magnetic Barkhausen noise signals of dual-phase materials with different composition ratios can be obtained. A quartic polynomial is used to describe the relationship between the spin interaction coefficient and the stress in the Ising model, and it is substituted into the magnetic Barkhausen noise signal simulation model of a dual-phase material to analyze the changes in the characteristics of the magnetic Barkhausen noise signal under the joint action of component proportion and stress law. The law of influence of component ratio and stress change on magnetic Barkhausen noise predicted by the method disclosed by the invention is consistent with the experimental results.
Description
technical field [0001] The simulation method of magnetic Barkhausen noise signal in stress-containing dual-phase ferromagnetic materials belongs to the interdisciplinary field of magnetic physics and non-destructive testing. Theoretical basis of non-destructive testing. Background technique [0002] The magnetic Barkhausen noise detection method has the characteristics of non-destructive testing and is very sensitive to changes in the proportion of internal components and stress of the material. During the experiment, it was observed that the magnetic Barkhausen noise signal detected in the dual-phase ferromagnetic material often presents a bimodal phenomenon, and the bimodal feature shows a regular trend of change with the volume ratio and stress of the dual-phase. [0003] At present, most of the simulation methods for the magnetic Barkhausen noise signal of stress-containing dual-phase ferromagnetic materials are realized by using the macroscopic hysteresis model combine...
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IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 何存富王志刘秀成
Owner BEIJING UNIV OF TECH