NDE of a 3-D Surface Crack Using Closely Coupled Probes for DCPD Technique

[+] Author and Article Information
M. Saka

Department of Mechanical Engineering, Tohoku University, Aoba, Aramaki, Aoba-ku, Sendai 980-77, Japan

D. Hirota

Construction & Maintenance Department, Osaka Steel Works, Sumitomo Metal Industries, Ltd., 1-109, 5-chome, Simaya, Konohana-ku, Osaka 554, Japan

H. Abé

Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-77, Japan

I. Komura

Heavy Apparatus Engineering Laboratory, Toshiba Corporation, 1-9 Suehiro-cho, Tsurumi-ku, Yokohama 230, Japan

J. Pressure Vessel Technol 120(4), 374-378 (Nov 01, 1998) (5 pages) doi:10.1115/1.2842346 History: Received April 04, 1997; Revised May 15, 1998; Online February 11, 2008


A procedure of applying the d-c potential drop technique using the closely coupled probes to NDE of a 3-D surface crack is newly developed. The calibration equation for three sensors which differ in the distance between the probes is derived. Experiments validated the use of the calibration equation for the NDE of cracks. The method to use the three sensors properly based on the measuring sensitivity is shown.

Copyright © 1998 by The American Society of Mechanical Engineers
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