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high-frequency induction welds

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... welding processes. The article also describes failure origins in other welding processes, such as electroslag welds, electrogas welds, flash welds, upset butt welds, flash welds, electron and laser beam weld, and high-frequency induction welds. arc welding brittle fracture electrogas welds...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
... Fig. 1 Photograph of bent pipe section Fig. 2 Pipe bending process with high frequency inductive heating and subsequent water quench Fig. 3 Photograph of pipe section in as received condition, as affected by surface cracking Fig. 4 Closer view of Fig. 3 . Gaping...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... An induction furnace in a steel mill was used to heat and diffuse galvanize (zinc) into the steel strips. A loud, high pitch frequency would radiate from the steel plate during the induction heating process. When the sound began, vertical stripes would also appear on the plating. The stripes on the galvanized...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... to the 1960s, ERW pipe manufacturing used direct current (dc) or low-frequency (typically less than 360 Hz) alternating current (ac) applied to the joint area using contact electrodes. During the 1960s and 1970s, electric resistance pipe welding moved to using high-frequency (typically 150 to 450 kHz) ac...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... toughness. Figure 6 shows two configurations: a semicircular crack and a semi-infinite crack, in which the width is greater than the depth. These shapes denote, respectively, the low and high severity of surface crack geometries to be expected in service. In the latter case, the stress-intensity factor...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... turbines, much higher in frequency than start/stop cycles, that can result in component damage over short periods of time. While the cyclic stresses involved are much lower than the yield stress, the repetitive nature of the stress leads to a damage mechanism known as high-cycle fatigue (HCF). Early...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... a shear groove at which the shaft should break if a sudden high overload occurred, thus preventing damage to an expensive gear mechanism. The rotor was subjected to severe chatter, which was an abnormal condition resulting from a series of continuous small overloads at a frequency of about three per...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... and temperatures that vary from extremely low, as in arctic or cryogenic environments, to extremely high, as in gas turbines. In addition, shafts may be subjected to a variety of loads—in general, tension, torsion, compression, bending, or combinations of these. Shafts are also sometimes subjected to vibratory...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... from hardened steel alloys. With worm gears, the most common applications involve surface-hardened steel worms with bronze gears, although the use of steel worms with polymer gears is increasing. The two most common alloys for the gears are high-tin bronzes, C90700 and C91700. It is important...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... weld. The appearance of these fatigue cracks is similar to the fatigue cracks due to shipping shown in Fig. 6 . On liquid lines, the pumping stations also experience fatigue cracks due to mechanical vibrations and high-frequency pressure cycles similar to the potential problems at gas compressor...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
..., high-frequency fatigue-loading applications where small cracks exist and no crack extension during service can be permitted. No cyclic crack propagation of an existing crack can be expected if: (Eq 24) Δ K = Δσ π · a / Q · M < Δ K th ASTM International E 647 defines Δ...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... of Shafts” in this Volume. Materials for Bridges and Cranes The use of a steel having a high impact resistance at low temperatures is required for the prevention of brittle fracture of structures, especially welded ones that are subjected to cold-temperature conditions in service. Use of a fine...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... input, and high-resolution instrument. IR systems are sensitive to surface emissivity. Rapid examination of large areas. Can be adapted to production inspections Circuit board solder joints, solar cells, heat-transfer equipment, metals, composites, concrete Sonic IR/vibro-thermography, inductive IR...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... condition, or stress concentrations. These preconditions also can be introduced in many ways by design and/or in conjunction with various production operations such as welding, thermal processing, surface finishing, fabrication, and assembly. Perhaps of greatest concern is the influence of high levels...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
.... Metallographic examination disclosed many small microfissures in the weld metal, but no microfissures were found in the HAZs of the wrought alloy 400 side of the weld. This section of line contained high thermal stresses that resulted from injection of steam a short distance upstream from the coupling. Chemical...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... , is an important design parameter for such applications as rotating shafts involving low-stress, high-frequency fatigue loading where no crack extension during service can be permitted. The fatigue-crack threshold is a function of a number of variables, including the material, the test conditions, the R-ratio...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... rivet holes and other areas of high stress when boiler water contained caustic soda (NaOH) or the boiler water chemistry was conducive to the formation of caustic soda ( Ref 4 ). In their 1926 paper, “The Cause and Prevention of Embrittlement of Boiler Plate,” researchers at the University of Illinois...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... engineering. The article presents the nomenclature, numbering systems, and worldwide market of REBs as well as provides description of REBs as high-tech machine components. It discusses heat treatments, performance, and properties of bearing materials. The processes involved in the examination of failed...