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eddy-current inspection

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0060104
EISBN: 978-1-62708-220-4
...Abstract Abstract Eddy current inspection was performed on a vertical evaporator unit (that contained 180 tubes) used in a chemical processing plant. It was advised that the tube material was type 316 stainless steel. The shell-side fluid was condensate and gaseous methylene chloride, while...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091699
EISBN: 978-1-62708-219-8
... Abstract Eddy-current inspection was performed on a leaking absorber bundle in an absorption air-conditioning unit. The inspection revealed crack-like indications in approximately 50% of the tubes. The tube material was phosphorus-deoxidized copper. Investigation (visual inspection, chemical...
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
... of detecting surface discontinuities by magnetic-particle inspection, liquid penetrant inspection, and eddy-current testing. The major NDE methods for internal (volumetric) inspection in failure analysis also are described. eddy-current testing liquid penetrant inspection magnetic-particle inspection...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047165
EISBN: 978-1-62708-217-4
... discovered during eddy-current testing. The flange on the second wheel half failed after only 31 landings, when about 46 cm (18 in.) of the flange broke off as the aircraft was taxiing. Stains on the fracture surfaces were used to determine when cracking was initiated. The analysis (visual inspection, liquid...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... components eddy current, ultrasonic, x-ray, dye-penetrant, and visual inspections are regularly accomplished. References 1. Nondestructive Evaluation and Quality Control , Vol 17 , ASM Handbook , ASM International , 1987 2. Metallic Materials and Elements for Aerospace...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... into the volume of the component. NDE techniques such as eddy current testing (ET) for electrically-conductive materials, full volumetric inspection using ultrasonic testing (UT) for metals, and radiographic testing (RT) are available in these instances. Eddy current testing is typically only able...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... inspection (LPI) was not able to reveal these cracks. However, eddy current inspection did detect the existence of large cracks which coincided with the indications found by MPI. Some internal cracks, which were not detected by MPI, were subsequently found during metallographic examination. MPI of the other...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... Locator System , 2002 [cited April 2002 ], available at http:www.dsp.dla.mil/ Many measurement techniques are employed in NDE. Those most widely used are visual, liquid penetrant, magnetic particle, eddy current, ultrasonic, and radiographic testing. Table 1 ( Ref 4 ) provides a brief...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... of ferrous metals, liquid-penetrant inspection, ultrasonic inspection, and sometimes eddy-current inspection. All these tests are used to detect surface cracks and discontinuities. Radiography is used mainly for internal examination. A photographic record of the results of nondestructive inspection...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001027
EISBN: 978-1-62708-214-3
... that the bushing bores be inspected for corrosion damage whenever the pillow-blocks were removed from the yoke assembly. A simple eddy current technique was recommended for inspection of the bushing bores at intervals of 300 h. No further instances of cracking from the pillow-block bushing bores have been reported...
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
.... (Caustic embrittlement is also known as caustic cracking. Both of these terms are considered archaic; currently, the term caustic stress-corrosion cracking is used to describe the same phenomenon.) Cracking was observed around rivet holes and other areas of high stress when boiler water contained caustic...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001048
EISBN: 978-1-62708-214-3
... inspection. They were within the dimensional tolerances and passed chemical, physical, hydrostatic, eddy current, and intergranular corrosion tests. A similar cooler was in series downstream, providing further cooling of the outgases/condensates from the first cooler. This second cooler had not shown any...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001356
EISBN: 978-1-62708-215-0
... and eddy current examination. No defects were found in the area of the groove. Figure 4 shows a slightly enlarged photograph of the origin. Figure 5 shows the various SEM features in the darkened origin and in the transition and overload areas. The origin is entirely intergranular (IG), which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001725
EISBN: 978-1-62708-229-7
... of the generator. These rings hold the return loops of the windings in place as shown in Fig. 1 . These retaining rings, referred to as “end bells” in England and Canada (and in the sketch, Fig. 1 ), are often made of a nonmagnetic alloy to minimize eddy currents and heating therefrom, thus improving...
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
... environments at tensile stresses well below the yield strength of the metal. The failures often take the form of fine cracks that penetrate deeply into the metal, with little or no evidence of corrosion on the nearby surface or distortion of the surrounding structure. Therefore during casual inspection...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... operation, and shutdown. Fabricators and suppliers of pipe or tubing strive to minimize or eliminate latent surface or subsurface imperfections produced during manufacture. Nondestructive inspection, such as by eddy-current, ultrasonic, air-under-water, and hydrostatic tests, is used to detect...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... components by dye-penetrant, ultrasonic, and eddy current techniques revealed several possible flaw indications in the weld regions, but none could be clearly identified. To facilitate X-radiography and to permit subsequent metallographic examination, the circular weld regions were cut from all three...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... in a cast or wrought product is an imperfection termed segregation. Chemical segregation originates in alloys during the solidification stage. Such deviations from the nominal composition are due to convection currents in the liquid, gravity effects, and redistribution of the solute during the formation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... metal may be useful to remove scale deposits as in the evaluation of the pitting. After the corrosion deposits have been removed, additional nondestructive testing may prove useful. Magnetic particle examination, penetrant examination, eddy current testing, and ultrasonic testing are a few...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... Abstract This article provides an overview of the structural design process and discusses the life-limiting factors, including material defects, fabrication practices, and stress. It details the role of a failure investigator in performing nondestructive inspection. The article provides...