EDDY-CURRENT TESTING IN PRACTICE
The use of eddy-current testing methods is described as it applies to three major areas of effectiveness: the identification and sorting of metals according to their electrical conductivities and permeabilities; the measurement of the thickness of thin metal sections, or the thickness of cladding or shrouding of one metal on or around another; and the detection and evaluation of discontinuities and other conditions in metals relating to their quality. The basic principles of nondestructive testing wlth induced eddy currents are prosented and discussed in detail, with particular regard to the effect of the several test parameters on the impedance of testing coils. Examples of effective eddy-current tests in use are presented, including the utilization of encircling coils for parts of cylindrical symmetry and probe coils which are applied to either plane or curved surfaces. The test systems are discussed with regard to the selection of test parameters, the attenuation of the induced eddy currents with depth, and the separation of the many variables which influence the tests. (auth)
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-011869
- OSTI ID:
- 4274662
- Report Number(s):
- ORNL-2655
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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