Nondestructive Testing Using Magnetic Field Visualization Technique
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
This paper describes a new technique to detect cracks or flaws in conducting or ferromagnetic materials using a magnetic field visualization system. In this system there are two sources for magnetic field generation, i.e. electrical current and magnetization. And the magnetic field generated by the source could give us useful information on cracks or flaws included in the material. Thus, visualization of magnetic field would enable us to identify the shape and size of cracks. We developed a preliminary system to verify the validity of the speculation and applied it to both ferromagnetic and conducting materials with flaws. The applicability of magnetic visualization has been confirmed to be an effective method in NDE and diagnosis of magnetic equipments in the present experiment. Furthermore, combination of this method with numerical prediction could demonstrate more potential capability in the field of NDE