Defect Detection with a Squid Magnetometer

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1986
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Weinstock, Harold
Nisenoff, M.
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

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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The development of the Superconducting QUantum Interference Device (or SQUID) as the most sensitive device known for thie measurement of changes in magnetic flux has presented new opportunities for the fields of geophysics [1] and biomagnetism [2]. In this paper we report on the use of SQUID instrumentation for nondestructive evaluation of electrically conducting and ferromagnetic specimens [3]. Specifically, we report preliminary experiments on the use of SQUIDs for the detection of defects (such as cracks, holes, weld seams, variations in wall thickness, etc.) in the walls of a hollow pipe, and for monitoring the magnetic state of a ferromagnetic sample under stress-strain loading conditions.

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Wed Jan 01 00:00:00 UTC 1986