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high-frequency welding

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003208
EISBN: 978-1-62708-199-3
... Abstract This article discusses the principles of operation, equipment needed, applications, and advantages and disadvantages of various fusion welding processes, namely, oxyfuel gas welding, electron beam welding, stud welding, laser beam welding, percussion welding, high-frequency welding...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.9781627081740
EISBN: 978-1-62708-174-0
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.9781627081733
EISBN: 978-1-62708-173-3
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003209
EISBN: 978-1-62708-199-3
... friction machines have been introduced for joining hollow sections (pipe and tube). ULTRASONIC WELDING (USW) is used effectively for joining both similar and dissimilar metals with lap-joint welds. High-frequency vibrations, introduced into the areas to be joined, disrupt the metal atoms at the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003206
EISBN: 978-1-62708-199-3
... present, the FCAW process has several advantages relative to other welding processes. These advantages include: High deposition rates, especially for out-of-position welding Less operator skill required than for gas metal arc welding (GMAW) Simpler and more adaptable than submerged arc welding...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003205
EISBN: 978-1-62708-199-3
... in.) sheet requires approximately 19,000 A and 1 2 s. Specific resistance welding processes include: Resistance spot welding (RSW) Resistance seam welding (RSEW) Projection welding (PW) Flash welding (FW) High-frequency resistance welding (HFRW) Capacitor discharge...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003021
EISBN: 978-1-62708-200-6
... is the most widely used polymer joining process. Numerous published papers describe the basic features. In this welding process, a sonotrode delivers low-amplitude (15 to 60 μm), high-frequency sinusoidal vibration in a direction perpendicular to the bond line. Although ultrasonic welding machine...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006470
EISBN: 978-1-62708-190-0
... Abstract Ultrasonic inspection is a family of nondestructive methods in which beams of high-frequency mechanical waves are introduced into materials, using transducers, for the detection and characterization of both surface and subsurface anomalies and flaws in the material. This article...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003043
EISBN: 978-1-62708-200-6
... interface. High-frequency welding Not suitable for conductive composites because high-frequency welding uses the material as a buffer. If the reinforcing fibers are dielectrically conductive, then transfer of heat to the interior of the composite may result in overheating, melting, thinning, and...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005680
EISBN: 978-1-62708-198-6
... electrodes and a much lower electrode force. This confines the area for current flow, creating a high-density energy source, which enables greater heating rates and higher peak temperatures to be reached during welding. Also, due to the small scale of the electrodes, they are not equipped with internal water...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003236
EISBN: 978-1-62708-199-3
... Abstract Ultrasonic inspection is a nondestructive method in which beams of high-frequency acoustic energy are introduced into a material to detect surface and subsurface flaws, to measure the thickness of the material, and to measure the distance to a flaw. This article provides a detailed...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001226
EISBN: 978-1-62708-170-2
... Abstract Ultrasonic cleaning involves the use of high-frequency sound waves that is above the upper range of human heating, or about 18 kHz, to remove a variety of contaminants from parts immersed in aqueous media. This article describes the process, design considerations and the equipment in...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006477
EISBN: 978-1-62708-190-0
... method over other NDE methods is the requirement for accessibility to both surfaces of the material to be tested. The ultrasonic method uses high-frequency sound waves to locate and measure flaws in welds. It can be used to inspect various materials such as metals, plastics, composites, ceramics, and...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006449
EISBN: 978-1-62708-190-0
... pipe has the potential for a high number of flaws in weld area, thus requiring more attention to this region of the pipe. For high-frequency induction- and electric-resistance-welded pipe, flaws may be located in the weld plane with two-dimensional features (i.e., length and width but negligible...
Book Chapter

Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006474
EISBN: 978-1-62708-190-0
... pressure vessel components are thick, massive structures that contain many feet of multiple-pass welds. These welds require extensive nondestructive inspection to ensure consistent high integrity of the vessel. Scanning acoustical holography has been used for the inspection of these thick welds. An...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006472
EISBN: 978-1-62708-190-0
... frequency, and the volume to be inspected. Missing scan lines indicate that a too-high velocity has been used. A maximum of 5% of the total number of lines collected in one single scan may be missed, but no adjacent lines shall be missed. If a weld is scanned in more than one part, an overlap of at least...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006473
EISBN: 978-1-62708-190-0
... for proper application of ultrasonic inspection systems. An ultrasonic inspection system includes several controls that can be adjusted to display as much information as is needed. If the pulse length and sensitivity controls (or their equivalents) are adjusted to a high setting, numerous...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003817
EISBN: 978-1-62708-183-2
... environmental cracking resistance of the cobalt alloys. Three welding processes that are used for hardfacing with the high-carbon Co-Cr-W alloys, namely, oxyacetylene, gas tungsten arc, and plasma-transferred arc are also discussed. The article examines the effects of various modes of high-temperature corrosion...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005322
EISBN: 978-1-62708-187-0
... appreciable amount of silicon (typically 1.0 to 4.0%) and thus are Fe-C-Si alloys. Compared to steels, cast irons have lower melting temperatures, higher fluidity, and are less reactive with mold materials. The high carbon content results in lower density and improved castability, and silicon provides...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005336
EISBN: 978-1-62708-187-0
... Abstract Nickel-base alloy castings are widely used in corrosive-media and high-temperature applications. This article begins with a discussion on the compositions of corrosion-resistant nickel-base casting alloys and heat-resistant nickel-base casting alloys. It describes the effects of...