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magnetic current imaging

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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
..., and the common methods 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...
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
... including a pie gage which aids in determining the orientation of the magnetic fields. NDE methods such as eddy-current test (ET) or ultrasonic testing (UT) may provide the screen output near an indication that shows the signal response of a flaw. Figure 4 shows the impedance output used...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001823
EISBN: 978-1-62708-241-9
... (based on visual inspection, magnetic particle inspection, stereoscopic analysis, scanning electron microscopy, tensile and hardness testing, and chemical analysis) was attributed to damage resulting from a lightning strike. polyethylene coated pipe fracture lightning damage pipe steel leaking...
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
.../isijinternational1966.19.401 45. Pargeter R.J. , Susceptibility to SOHIC for Linepipe and Pressure Vessel—Review of Current Knowledge , Corrosion 2007, NACE International , 2007 , p 1 – 27 46. Takahashi A. and Ogawa H. , Influence of Microhardness and Inclusion on Stress Oriented Hydrogen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001796
EISBN: 978-1-62708-241-9
... on the roller ( a ) and outer ring raceway ( b ) in secondary electron image mode (SEI) documenting densely packed craters due to electrical current passage through the bearing The size distribution and classification of the microcraters observed on the rollers and outer ring raceway surfaces are shown...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001639
EISBN: 978-1-62708-229-7
..., annular space of the 46 year old, inactive, 1.03 million gallon waste storage tank. A steerable, magnetic wheel wall crawler was inserted into the annular space through small (6 in., or 150 mm, diam) holes/risers in the tank top. The crawler carried the equipment used to simultaneously collect data...
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
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... temperature (scanning electron microscope). Optical fractography. Original magnification: 1500× Fig. 15 Crater crack in carbon steel fillet weld termination as revealed under wet fluorescent magnetic-particle testing Fig. 16 Centerline hot crack in AISI/SAE 1020 steel Fig. 17...
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
... ) and consist of electromagnetic instruments, direct current and permanent magnet method instruments, and magnetic flux leakage instruments. Chemical analysis of the individual wires does not provide significant insight, because most specifications do not require any particular composition. Most wire ropes...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006772
EISBN: 978-1-62708-295-2
... of the facility and surrounding area. Figure 3 shows the images acquired from an sUAS of tornado damage in a rural community. (The sUAS was deployed within 48 h of the incident.) Fig. 2 Aerial image captured by a small unmanned aerial system (i.e., drone) of an industrial facility after a tornado...
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
... just above 120 Hz. This is very dangerous because 60 Hz current is used in the U.S., and, thus, the two magnetic poles pass by a stationary structure at 120 Hz. This passage provides strong excitation at that frequency. It was discovered that the phase lead natural frequencies tend to drop as the phase...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006836
EISBN: 978-1-62708-329-4
... ). Figure 2(a) shows the location of a fatigue crack on the cross section of a spring that initiated approximately 1 mm subsurface due to a large inclusion particle. Figure 2(b) shows the fracture with SEM imaging. The EDS mapping scans in Fig. 3 reveal that the inclusion is rich in aluminum...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001834
EISBN: 978-1-62708-241-9
...-2.25Cr-1Mo steel at 400 °C . Corros. Sci . 53 ( 6 ), 2233 – 2246 ( 2011 ) 10.1016/j.corsci.2011.03.007 18. Stringer J. , Wright I.G. , Current limitations of high temperature alloys in practical application . Oxid. Met . 44 , 265 – 308 ( 1995 ) 10.1007/BF01046730...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... Monitoring of Melt Pool Images for Porosity Prediction in Directed Energy Deposition Processes , IISE Trans. , Vol 51 (No. 5 ), 2019 , p 437 – 455 , 10.1080/24725854.2017.1417656 31. Sames W.J. , List F.A. , Pannala S. , Dehoff R.R. , and Babu S.S. , The Metallurgy...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003527
EISBN: 978-1-62708-180-1
... stereopair image in Fig. 22 . Videography is used in failure analysis photography to capture dynamic events as well as to document rapidly changing component conditions. Current videography cameras are available with either analog or digital technology. Digital videocameras have the advantage...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006811
EISBN: 978-1-62708-329-4
... to the success or failure of a medical device Fig. 8 Scanning electron microscopy micrographs showing (a) fatigue fracture surface in a nitinol stent and (b) fracture origin emanating from a surface inclusion Fig. 6 Scanning electron microscopy image showing microvoid coalescence...
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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001597
EISBN: 978-1-62708-236-5
... of performing a complete failure analysis to determine the factors responsible for failure, the engineer may simply determine if the material met the customer's specifications. This approach has become even more understandable if you consider the current business environment where lawyers and insurance...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001109
EISBN: 978-1-62708-214-3
.... The processing of taconite iron ore involves grinding, magnetic separation of iron, mixing in additives, pelletizing, and heating the pellets to high temperatures to sinter and harden them (induration). In “acid” pellet production, the additive is bentonite, which serves as a binder to promote green strength...
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
... of a failure analysis investigation should be to not only verify damage leading to the equipment failure but also to identify the root cause of the damage and failure. Other, related goals should include: Determining whether the equipment can safely be returned to service in its current condition...