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alternating current

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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
...Abstract Abstract An induction heating system consists of a source of alternating current (ac), an induction coil, and the workpiece to be heated. This chapter describes the basic phenomena underlying induction heating with respect to the interactions between the coil and the workpiece...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... Size Effect of Particle Shape Visibility and Contrast Dry Particles Wet Particles Oil Suspending Liquid Strength of the Bath Prod Contacts Direct Contact Method Central Conductors Coils Direct Current Alternating Current Power Sources Portable Equipment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030023
EISBN: 978-1-62708-282-2
... a low resistivity fluid and is also buried, corrosion can occur on both the internal and external surface of the pipeline. Stray currents are usually thought of as being dc currents. However, severe damage can be also caused by alternating currents (ac). Alternating currents are induced onto...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
.... , Ed., American Society for Metals , 1984 , p 242 – 319 34. Tolstaya , et al. , Electrocorrosion of Cables with Aluminum Casing under the Effect of Alternating Currents , Zashch. Met. , Vol 2 , 1956 , p 55 35. Mikhailovski Y.N. , Electrochemical Corrosion of Metals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
... the core and is made of magnetically permeable material. This core is free to move axially inside the transformer. The primary winding is energized by an alternating current. The magnetic flux resulting from this alternating current is coupled by the core to the secondary windings. Initially, when the core...
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
...., the workpiece. These so-called eddy currents dissipate energy and bring about heating. The basic components of an induction heating system are an induction coil, an alternating-current (ac) power supply, and the workpiece itself. The coil, which may take different shapes depending on the required heating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440159
EISBN: 978-1-62708-262-4
... per second, as in high-frequency alternating current, the molecules also tend to change their alignment a similar number of times. As a result, molecular friction is set up and heat is generated. When the steel is heated and becomes austenitic, it also becomes nonmagnetic. The heat generated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... 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 currents within...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
... is cycled back and forth, the electricity is said to be operating as “alternating current” or ac mode. With dc operation, the workpiece can be either positive or negative relative to the electrode in the welding source. The two modes of dc operation are typically referred to as: Direct current...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
.... Resistance Alternating Current and Electromagnetism Hysteresis Skin Effect and Reference Depth Power Density Conduction of Heat References References 1. Heat Treating , Vol 4 , Metals Handbook , 9th ed. , American Society for Metals , 1981 2. Semiatin S.L...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
.... Practical minimum carbon content can be determined from this curve. Source: Ref 1 Induction Hardening Induction hardening is a versatile heating method that involves placing a steel part in the magnetic field generated by high-frequency alternating current passing through an inductor, usually...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... variety of physical, structural, and metallurgical conditions in electrically conductive ferromagnetic and nonferromagnetic metals and metal parts. The part to be inspected is placed within or adjacent to an electric coil in which an alternating current is flowing. As shown in Fig. 10 , this alternating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... of electrochemical measurements are the following: Potential Current Resistivity Polarization curves Linear polarization Frequency response (alternating-current impedance) Potential, current, and resistance properties are measured either individually or collectively. The combined...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... that mask critical variables or are mistakenly interpreted to be caused by critical variables. In the eddy-current method, the part to be inspected is placed within, or adjacent to, an electric coil in which an alternating current flows. The alternating current, also known as the exciting current...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... for the conversion of the alternating current (ac) to direct current (dc). Output control and tuning were accomplished through a combination of different taps on the output of the tank coil and a control knob that tapped the plate transformer for different output voltages. The power was turned on and off through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
.... This cell includes the following essential components: (a) a metal anode, (b) a metal cathode, (c) a metallic conductor between the anode and the cathode, and (d) an electrolyte in contact with the anode and the cathode. If the cell were constructed and allowed to function, an electrical current would flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... across the interface as it passes between two electrodes pressed against the work. The current is normally direct current (dc) or low-frequency alternating current (ac), from 60 to 360 Hz. In some cases, the current may be the result of a capacitor discharge. Very high currents are required to heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
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
... direct or alternating current to generate the necessary magnetic fields. The current can be applied in a variety of ways to control the direction and magnitude of the magnetic field. In one method of magnetization, a heavy current is passed directly through the casting placed between two solid contacts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220047
EISBN: 978-1-62708-341-6
... inside a stator. In the slots of the stator, there are two windings. [1] One, called the field winding, is connected to an external source of direct current and forms a magnetic field around the rotor. When the rotor rotates, alternating currents are induced in the second, or output, winding...