Magnetic effects in eddy current nondestructive method

Magnetic effects in eddy current nondestructive method are studied employing an extension of the general ideas of Globus for the magnetization processes of polycrystalline materials. The reversible permeability depends on the residual magnetization of the material. The relation between these two qua...

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Bibliographic Details
Published in:Journal of applied physics 1986-01, Vol.59 (2), p.671-673
Main Authors: Yi, Jae-yel, Lee, Sekyung
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Industrial metrology. Testing
Mechanical engineering. Machine design
Non-destructive testing: methods and equipments
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Summary:Magnetic effects in eddy current nondestructive method are studied employing an extension of the general ideas of Globus for the magnetization processes of polycrystalline materials. The reversible permeability depends on the residual magnetization of the material. The relation between these two quantities is derived from the Globus model. An expression is derived for the impedance of a single-turn coil above a ferromagnetic conducting half-space. From this expression, flaw effects and liftoff effects are analyzed, and theoretical treatment for the evaluation of residual magnetization is described.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.336634