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Eddy current testing

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001021
EISBN: 978-1-62708-214-3
... and a series of “overstress” events recorded during the life of the aircraft. The bolt hole was examined by eddy current testing, visual examination, high-powered light microscope, and scanning electron microscope. Simulation tests were also conducted. The use of simulation specimens permitted actual crack...
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
... for eddy-current testing Table 4 Configurations for eddy-current testing Method Description Use Multifrequency techniques Instrumentation is capable of operating at two or more test frequencies. Test coils are typically excited with multifrequency signals, using either...
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 Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... of a complete leaking tube cut into 1.2 m (4 ft) lengths. The second sample was a piece cut from a nonleaking tube. Preliminary test results showed that both tubes were severely cracked and pitted from the outside surface. Eddy current testing was performed on 2% of the tubes evenly distributed throughout...
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
... in tube material was recommended to avoid future failures and loss of service. Chemical processing equipment Chlorides Eddy current testing Evaporators Tubes 316 UNS S31600 Pitting corrosion Stress-corrosion cracking Eddy current inspection was performed on a vertical evaporator unit...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0060097
EISBN: 978-1-62708-219-8
... was assumed to be a freeze-up of the tube side water that occurred during interruption of the tube side flow or misoperation of the unit. Air conditioning equipment Bursting Eddy current testing Excessive internal pressure Tubes Copper tube (Other, general, or unspecified) fracture An eddy...
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
... of the component. Near-surface and subsurface techniques are available to the failure analyst in these cases, to investigate more detailed information into the volume of the component. NDE techniques such as eddy current testing (ET) for electrically-conductive materials, full volumetric inspection using...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001811
EISBN: 978-1-62708-241-9
... observed in the material Characterization by Eddy Current Method Eddy current testing is based on the principles of electromagnetic induction and is sensitive to the electrical conductivity and magnetic permeability of conductive materials. Eddy current evaluation technique can be applied on both...
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
... most widely used are visual, liquid penetrant, magnetic particle, eddy current, ultrasonic, and radiographic testing. Table 1 ( Ref 4 ) provides a brief definition of these methods (other than visual) and their uses and limitations. Figure 1 shows photographs of some actual inspection situations...
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
...: magnetic-particle inspection 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...
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
... were examined in detail. The tubes had been manufactured by the seamless process as per ASTM A-213 under third-party inspection. They were within the dimensional tolerances and passed chemical, physical, hydrostatic, eddy current, and intergranular corrosion tests. Performance of Other Parts in Same...
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
... recommended 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...
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
..., additional nondestructive testing may prove useful. Magnetic particle examination, penetrant examination, eddy current testing, and ultrasonic testing are a few techniques that can be employed to explore the quality and condition of the failure and material. Microscopic Examination As noted previously...
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
... size and the geometric details of the component. For instance, the smallest crack length that eddy-current inspection techniques are able to detect is approximately 0.1 mm (0.004 in.) ( Ref 20 ). If the calculated crack size at the first inspection is less than this value, it is unlikely that a crack...
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
... inspected 18 months prior to the failure using visual, liquid penetrant and eddy current examination. No defects were found in the area of the groove. Surface Examination Figure 4 shows a slightly enlarged photograph of the origin. Figure 5 shows the various SEM features in the darkened origin...
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
... alloy to minimize eddy currents and heating therefrom, thus improving the efficiency of the generator. After the accident the inboard field retaining ring was found securely in place on the rotor but the right end ring was missing. It was found in two pieces in the pit under the generator after...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
... angularity and apparent density of a particle. Apparent density is ( R / r ) 3 × real reactive density. Source: Ref 16 Fig. 5 Comparison of wear surfaces for low-alloy steel specimens worn in (a) flow-through and (b) recycled slurry tests for 1 h and 1.67 h, respectively. Source: Ref 13...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006754
EISBN: 978-1-62708-295-2
... relations and education, at the least. Failure analysis of a complex or catastrophic failure requires much more. People who perform failure analysis as part of their job function must have an awareness of how their legal obligations are defined. People who perform destructive testing on a component...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003518
EISBN: 978-1-62708-180-1
.... Nondestructive testing methods Including radiography, magnetic particle inspection, eddy current testing, dye penetrant inspection and other methods. Cracks, porosity, and unsoundness of various types may be able to be detected without cutting the part. Microfractrography and other techniques with SEM...
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
...) (a) Determined by combustion methods. (b) Determined by gravimetric methods. (c) Determined by x-ray diffraction. (d) Layer too thin and fragile to measure its thickness Results of longitudinal tensile test Table 3 Results of longitudinal tensile test Specimen Yield strength, 0.2...