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electromagnetic field

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Published: 01 December 2006
Fig. 6.37 Distribution in the electromagnetic field line in the induction coil More
Image
Published: 01 August 2015
Fig. A3.7 Electromagnetic field distribution in two-turn coil (a) without and (b) with a magnetic flux concentrator. Source: Ref 5 More
Image
Published: 01 August 2015
Fig. 2.1 Induction coils with electromagnetic fields. OD: outside diameter; ID: inside diameter. Source: Ref 1 More
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Published: 01 October 2011
Fig. 7.27 Electromagnetic yoke, showing position and magnetic field to detect discontinuities parallel to a weld bead. Discontinuities across a weld bead can be detected by placing the contact surfaces of the yoke next to and on either side of the bead (rotating yoke about 90° from position More
Image
Published: 01 April 2013
Fig. 7 Electromagnetic yoke, showing position and magnetic field to detect discontinuities parallel to a weld bead. Discontinuities across a weld bead can be detected by placing the contact surfaces of the yoke next to and on either side of the bead (rotating yoke about 90° from position shown More
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Published: 01 November 2013
Fig. 34 Basic circuit and magnetic field patterns for electromagnetic compression forming of a tubular workpiece. (a) Field pattern in absence of workpiece. (b) Field pattern with workpiece in forming coil. (c) Field pattern when field shaper is used. A, high pressure; B, low pressure. Source More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... in the field. Therefore, most liquid penetrant inspection is done with equipment designed specifically for the purpose. A variety of equipment is available. “Package units” that incorporate all the necessary stations and controls are widely used, especially where relatively small workpieces in a variety...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
.... Induction heating occurs when a strong electromagnetic force field is produced from an induction coil close enough to a part to produce an electric current in the part. The part is heated mainly due to the resistance of the flow of this electric current. The actual heating is a complex function related...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... such as machined coils need to have development programs with testing before the final coil design is produced. This appendix discusses materials used in coil building, coil design, and coil construction techniques. The electromagnetic flux fields and their influence on coil design are presented. In addition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500227
EISBN: 978-1-62708-317-1
... According to Ref 11.8 , electromagnetic forming (EMF) includes all production processes using pulsed magnetic fields to apply forces and thus deform a sheet metal workpiece of an electrically conductive material. The main advantages of EMF can be summarized as follows: Because the magnetic field...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
..., an electromagnetic field is generated around the coil. When a magnetic object (metal) enters the vicinity of the sensor, eddy currents build up in the object. This reduces the strength of the sensor’s own current. When, the reduction in the sensor’s own oscillation field reaches a certain level, an output circuitry...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220241
EISBN: 978-1-62708-341-6
... in.) thick is sufficient to act as a shield. At 450 kHz, copper as thin as 0.61 mm (0.024 in.) can be used reliably. The power absorption into a shield from the electromagnetic field is a function of its permeability and resistivity. Copper, with a permeability of μ = 1, will absorb approximately 30...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730051
EISBN: 978-1-62708-283-9
...: diamagnetic behavior, which is a weak repulsion of a magnetic field, and paramagnetism, which is a weak attraction of a magnetic field. Fig. 5.1 Typical legend about lodestone, the first permanent magnet known to man. Source: Ref 5.1 Ferromagnetism, in contrast, is a very strong attraction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... the bars on the basis of seam depth. Electromagnetic systems include the systems that use magnetic fields generated by alternating current flowing in a solenoid. A wide range of frequencies is used. As the alternating current flows through the solenoid, the magnetic field generated induces eddy...
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
... in Appendix 2, “Scan Hardening,” in this book. This chapter deals with general theory, types, and applications of coils. Classifications of Coils by Electromagnetic Field The two coil classifications relate to the direction of eddy currents produced by the coil in the workpiece: longitudinal flux...
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
... Abstract Electromagnetic induction, or simply "induction," is a method of heating electrically conductive materials such as metals. It is commonly used for heating workpieces prior to metalworking and in heat treating, welding, and melting. This technique also lends itself to various other...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... the resolution range by more than two orders of magnitude to approximately 4 nm in routine instruments, with ultimate values below 1 nm. The SEM also provides a greater depth of field than the light microscope, with depth of focus ranging from 1 μm at 10,000× to 2 mm at 10×, which is larger by more than two...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... Magnetic particle inspection is used to locate surface and subsurface discontinuities in ferromagnetic materials. The method is based on the fact that when a material or part being tested is magnetized, discontinuities that lie in a direction generally transverse to the direction of the magnetic field...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720345
EISBN: 978-1-62708-305-8
... be combined with another operation, for example, welding. As the tube emerges from the welding operation, it enters the field of the electromagnetic yoke ( Fig. 3 ), which generates a flux in the weld area. The oscillating probe detects any flux diverted by a flaw in the weld. However, in most cases, the need...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220143
EISBN: 978-1-62708-341-6
... regions as small as 1 mm (0.04 in.) in diameter. Inert and rugged construction. Fiber optics are unaffected by electromagnetic induction fields and contain no moving parts which can fail during service. Wide range of temperature measurement. With the proper selection of fibers and an infrared...