Abstract
Methods were developed to estimate the coefficient of reflection for the film visualization of magnetic fields in a defect zone in the process of the magnetization of a ferrous object parallel to a plate surface with due consideration for the tangential and normal defect zones and the impacts of media boundaries. Mathematical formulas were obtained, an analytical analysis was performed, and the behavior of the coefficient of reflection was defined compared to the film visualization of magnetic fields in the area of indication patterns of different types of continuity defects with account for their parameters and depth as revealed during the testing of an object in an applied field when the external luminous flux is perpendicular to the film surface.
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Original Russian Text © V.A. Novikov, A.B. Shilov, 2014, published in Defektoskopiya, 2014, Vol. 50, No. 2, pp. 25–33.
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Novikov, V.A., Shilov, A.B. Evaluation of the coefficient of reflection for revealing magnetic fields via film in a defect zone during the control of ferrous objects. Russ J Nondestruct Test 50, 72–79 (2014). https://doi.org/10.1134/S1061830914020053
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DOI: https://doi.org/10.1134/S1061830914020053