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DC Potential-Drop Technique for the Evaluation of 3-D Back-Wall Cracks in Steel Structures

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Abstract:

A direct-current potential-drop NDE technique has been developed for the evaluation of a 3-D back-wall crack in thick-walled structures. The measuring system contains two pairs of probes – one for current supply and the other for the measurement of potential-drop, where the currentsupply and measuring probes are in close proximity to each other. The optimum arrangement of the four-point-probes system is determined from the finite-element simulation of the three-dimensional electric crack problem. The predicted potential-drop across the crack has been verified experimentally using the newly developed measuring sensor. Measured results of semi-elliptical cracks in stainless steel plates establish the practicality as well as reliability of the present potentialdrop method of testing for the evaluation of 3-D back-wall cracks in thick-walled structures.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

434-440

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.434

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Online since:

October 2006

Authors:

S. Reaz Ahmed, Masumi Saka, Fumio Takeo

Keywords:

Back-Wall 3-D Crack, Direct Current (DC), Potential Drop, Thick-Walled Structure

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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