Application of A.C. potential drop technique to nondestructive evaluation to thin layers on material surface

Masumi Saka, Haruhiko Kurosaki, Kenji Nishibe, Hiroyuki Abe

Research output: Contribution to journalConference articlepeer-review

Abstract

A principle is proposed for applying the a.c. potential drop technique to nondestructive evaluation of a thin layer on a material surface. First, Maxwell's equations are solved to obtain the potential drop on the surface of a layer, where induced electromotive force due to magnetic field caused around the material by the current is treated as one of unknowns. Next, a.c. potential drop is measured for a specimen with a thin layer on its surface. Finally, the inverse problem is analyzed to determine the thickness and the conductivity of the layer, the electromagnetic property of the matrix and the induced electromotive force, where measurements of the potential drop are compared with theoretical computations for a wide range of frequency. It is verified that the present method can be used for the nondestructive evaluation of the thin layer.

Original languageEnglish
Pages (from-to)151-155
Number of pages5
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume195
Publication statusPublished - 1994 Dec 1
EventProceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA
Duration: 1994 Nov 61994 Nov 11

ASJC Scopus subject areas

  • Mechanical Engineering

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