Non-destructive Testing (NDT) of metal cracks using a high Tc rf-SQUID and eddy current method

Conference · Sat Apr 01 04:00:00 EST 1995

OSTI ID:135390

Lu, D F; Fan, C; Ruan, J Z; Han, S G; Wong, K W; Sun, G F ^[1]

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1. Kansas Univ., Lawrence, KS (United States)

A SQUID is the most sensitive device to detect change in magnetic field. A nondestructive testing (NDT) device using high temperature SQUID`s and eddy current method will be much more sensitive than those currently used eddy current systems, yet much cheaper than one with low temperature SQUID`s. In this paper, the authors present their study of such a NDT device using a high temperature superconducting rf-SQUID as a gradiometer sensor. The result clearly demonstrates the expected sensitivity of the system, and indicates the feasibility of building a portable HTS SQUID NDT device with the help from cryocooler industry. Such a NDT device will have a significant impact on metal corrosion or crack detection technology.

• Research Organization: National Aeronautics and Space Administration, Houston, TX (United States). Lyndon B. Johnson Space Center
• OSTI ID: 135390
• Report Number(s): N--96-10272; NASA-CP--3290-VOL-2; S--792-VOL-2; NAS--1.55:3290-VOL-2; CONF-940627--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
DESIGN
EDDY CURRENT TESTING
FRACTURES
HIGH-TC SUPERCONDUCTORS
METALS
NONDESTRUCTIVE TESTING
SQUID DEVICES