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eddy-current distribution

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
.... The chapter reviews the mechanistic basis for induction heating and provides an example of eddy-current distribution in a solid bar. The chapter defines two important concepts in the technology of induction heating: equivalent resistance and electrical efficiency. The chapter concludes with a discussion...
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 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... extensions are shown in Chapter 4, “Induction Coils,” in this Volume under the discussion of “Bus Bars for Power Transmission.” When designing a coil, it is important to visualize the distribution of the eddy currents that cause the workpiece to heat. The objective is to induce current in the area...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
...<xref ref-type="fn" rid="t65220143-fn6">[6]</xref> Eddy-Current Techniques Coil-Current Monitoring Load-Signature Analysis Many single-shot induction heating applications, such as preheating and heat treating, involve heating to a given temperature prior to further processing. The requirements of the temperature-sensing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... conductivity. The fact that the lift-off curves approach the conductivity curve at an angle can be used in some instruments to separate lift-off signals from those resulting from variations in conductivity or some other parameter of interest. Eddy currents are not uniformly distributed throughout a part...
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
..., and dimensional 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
... crashes, how acoustic emission, ultrasonic, and eddy current sensors detect tool breakage and part defects such as cracks, and how roller ball and optical sensors measure material flow. It also discusses the role of draw-in, wrinkle, oil-monitoring, and vision sensors and explains how material properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
.... The nondestructive testing methods discussed are liquid penetrant inspection, magnetic particle inspection, eddy current inspection, radiographic inspection, and ultrasonic testing. chemical analysis coordinate measuring machines hardness testing machine vision metallography nondestructive testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... of nondestructive inspection of weldments including visual inspection, liquid penetrant inspection, magnetic particle inspection, radiographic inspection, ultrasonic inspection, leak testing, and eddy current and electric current perturbation inspection. The chapter also describes the properties of brazing filler...
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
... as the power coil. Source: Ref 7 Fig. 4.5 Increase in case depth with concentrators in inside-diameter coils. Coils A, C: without concentrator; coils B, D, E, F: with concentrator. Source: Ref 8 Fig. 4.4 Current distribution in straight conductor. Source: Ref 6 Fig. 4.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220241
EISBN: 978-1-62708-341-6
.... By this means, the eddy-current paths are minimized to keep losses low. The thickness of the individual laminations should be held to a minimum. Generally, below 3 kHz, the laminations should be on the order of 0.38 mm (0.015 in.) each. At 10 kHz, a thickness of 0.20 mm (0.008 in.) is used. The laminations have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... to realign during each cycle, dipole friction can produce heat. Another source of energy loss is through electrical eddy currents that can be induced and consequent Joule heating ( I 2 R ). Eddy current losses can be minimized by using magnetic materials with a high resistivity. Fig. 17.15 Process...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... to detect these flaws include visual, magnetic particle, liquid penetrant, ultrasonic, eddy current, and radiographic inspection. This chapter provides a detailed discussion on the characteristics, process steps, applications, advantages, and limitations of these methods. It also describes the flaws caused...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860163
EISBN: 978-1-62708-348-5
.... B. (1959) . Eddy current method for measuring the resistivity of metals. J. Appl. Phys . 30 , 1976 – 1980 . 10.1063/1.1735100 Betts D. S. (1976) . Refrigeration and Thermometry below One Kelvin . Sussex University Press/Crane, Russak &amp; Co. , New York . 10.1016/0011-2275...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030360
EISBN: 978-1-62708-282-2
.... , Engineering Equipment Manufacturers and Users Association EEMUA 159 , 2003 Data Acquisition Reporting and Trending Review and Audit Dye Penetrant Inspection Magnetic Particle Inspection Eddy-Current Inspection Acoustic Emission Inspection Magnetic Flux Leakage Pulsed Eddy-Current...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
...Relative uses and merits of various nondestructive testing methods Table 7.2 Relative uses and merits of various nondestructive testing methods Parameter Test method Ultrasonics X-ray Eddy current Magnetic particle Liquid penetrant Capital cost Medium to high High Low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... Magnetic Particle Testing Eddy Current Inspection Radiography Using x-rays, γ-rays, and Neutrons Ultrasonic Inspection In addition to these conventional NDE techniques, there are certain other techniques that are employed under special circumstances. Acoustic Emission Computed Tomography...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... corrosion products/films, etc., making subsequent chemical identification impossible. B.5 Eddy-current inspection Detection of cracks or defects and thickness of coatings, which cause variation in eddy currents induced by an applied alternating magnetic field General incidence/extent of cracks...
Book Chapter

By J. W. Ekin
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860465
EISBN: 978-1-62708-348-5
..., λ, at the surface (not to scale) ( Powell and Clark, 1977 ). The vanishing of the magnetic field at the interior of a superconductor is brought about by super currents in the superconductor. The magnitude and distribution of these currents are such as to create an opposing interior field...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260029
EISBN: 978-1-62708-336-2
... R.A.P. , and Macey G. , Isothermal Extrusion , Light Met. Age , April 1999 Heat Balance in Direct Extrusion Significant research has been done on temperature model and temperature distribution during extrusion. One of the current and simple finite difference models is discussed...