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eddy current system

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Published: 01 April 2013
Fig. 8 Coil assembly for the inspection of steel bars by the eddy current system. Dimensions in inches. Source: Ref 1 More
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Published: 01 April 2013
Fig. 17 Principal elements of a typical system for eddy current inspection of bar or tubing. See description in text. Source: Ref 3 More
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Published: 01 April 2013
Fig. 15 Schematic of eddy current flaw detection system used to inspect sheared bolt illustrated in Fig. 14 . Source: Ref 2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... inspection, ultrasonic inspection, and electromagnetic inspection. Eddy current and magnetic permeability are also covered. electromagnetic inspection eddy current system flaws liquid penetrant inspection magnetic particle inspection steel bar steel wire ultrasonic inspection visual inspection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720345
EISBN: 978-1-62708-305-8
... on tubing having wall thicknesses less than 3.2 mm (⅛ in.), but successful production testing has been reported on tubing having wall thicknesses to 13 mm (½ in.). Most eddy current tests use differential systems and are most sensitive to flaws that involve a marked change in normal electrical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... Abstract Liquid penetrant, magnetic particle, and eddy current inspection are used to detect surface flaws. This chapter is a detailed account of the physical principles, process description, equipment requirements, selection criteria, advantages, limitations, and applications of these surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... for determination of power requirements for a given application. eddy-current distribution induction heating induction-coil resistance power requirements An induction heating system consists of a source of alternating current (ac), an induction coil, and the workpiece to be heated. The basic phenomena...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
... Abstract This chapter discusses the basic principles of induction heating and related engineering considerations. It describes the design and operation of induction coils, the magnitude and distribution of magnetic fields, and the forces that generate eddy currents in metals. It explains how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
... to evaluate different material properties at the same time and also helps to improve the accuracy of the measurements ( Ref 15.27 ). To ensure consistent and exact correlation between the eddy current readings and the material properties of the tested coil, the system must undergo a teaching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... (irregularities or discontinuities) or leaks in engineering systems. Of the many different NDT techniques used in industry, liquid penetrant and magnetic particle testing account for about one-half of all NDT, ultrasonics and x-ray methods about another third, eddy current testing about 10%, and all other methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... development and may find some use in the future. These methods include those based on ultrasonics, eddy-current detection, and real-time measurement of coil current or impedance during induction heating. Each of these is briefly discussed below. Ultrasonic Methods<xref ref-type="fn" rid="t65220143-fn6">[6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050245
EISBN: 978-1-62708-311-9
... account for about 50% of all NDT testing, with ultrasonic and x-ray methods accounting for about another third. Eddy current accounts for approximately 10%. All other methods were about 2%. Table 12.4 provides examples on the relative uses and merits of various NDT methods from an operational viewpoint...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... inspection. Casting defects including porosity, oxide films, inclusions, hot tears, metal penetration, and surface defects are reviewed. Liquid penetrant inspection, magnetic particle inspection, eddy current inspection, radiographic inspection, ultrasonic inspection, and leak testing for castings...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220001
EISBN: 978-1-62708-341-6
... Vacuum Induction Melting Ingots Billets Castings “Clean” steels Nickel-base superalloys Titanium alloys As its name implies, induction heating relies on electrical currents that are induced internally in the material to be heated–i.e., the workpiece. These so-called eddy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930085
EISBN: 978-1-62708-359-1
... used widely in automated tube-testing systems and material sorting, as well as in the inspection of aircraft components and structures. For the testing of welds, there is a growing interest in using eddy-current testing as an alternative to MPT and penetrant testing, because the method is able...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
...-ray, and eddy current testing. fracture toughness metallography fatigue testing hardness testing nondestructive testing tensile testing THE LEVEL OF QUALITY of a product or service may be judged by the customer based upon conformance to the relevant set of specifications or standards...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220241
EISBN: 978-1-62708-341-6
... larger eddy currents in the workpiece. Fig. 9.1 Concentrating effect of a permeable core on a magnetic flux field Materials for Flux Concentrators Materials for flux concentrators are of two basic types: (1) packages of laminated silicon steel punchings used at frequencies below 10 kHz...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380085
EISBN: 978-1-62708-456-7
... effect of the current, which is known as eddy current, induces heat. The eddy-current effect is probably the major source of heat, particularly when the steel has become nonmagnetic. After the steel has been heated to the proper austenitizing temperature and required depth, quenching is accomplished...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860163
EISBN: 978-1-62708-348-5
... by Morrison (1967) . 5.2.3 Eddy Current Method An ac technique that has proven very useful in relative resistivity determinations is the eddy current decay method. The basis for the method is described by Bean, DeBlois, and Nesbitt (1959) , and detailed description of a working system is given...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050057
EISBN: 978-1-62708-311-9
... have significant power losses and need good cooling. Separate high-pressure cooling systems may be necessary for high-power applications. The coil must be designed so that the magnetic flux lines produce eddy currents that heat the desired areas. The highest concentration of flux lines is inside...