Results 171 to 180 of about 2,693 (205)
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Key Engineering Materials, 2006
The magnetic camera using magnetic lens is proposed to satisfy the demands such as obtaining the distribution of the magnetic flux leakage (DMFL) on the high lift-off, and improving sensitivity. However, DMFL is strongly affected by the magnetization direction. Therefore, the DMFL has low intensity when the crack is not perpendicular to the magnetizing
Jin Yi Lee, Ji Seong Hwang
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The magnetic camera using magnetic lens is proposed to satisfy the demands such as obtaining the distribution of the magnetic flux leakage (DMFL) on the high lift-off, and improving sensitivity. However, DMFL is strongly affected by the magnetization direction. Therefore, the DMFL has low intensity when the crack is not perpendicular to the magnetizing
Jin Yi Lee, Ji Seong Hwang
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Japanese Journal of Applied Physics, 1994
The ultrasonic velocity in a magnetic fluid (MF) on a base of water is measured under different temperatures, frequencies and magnetic fields. Two Kinds of ultrasonic correlation systems are employed. The maximum velocity is observed at 38°C without distinction of frequency.
Kazuhiko Imano Kazuhiko Imano +1 more
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The ultrasonic velocity in a magnetic fluid (MF) on a base of water is measured under different temperatures, frequencies and magnetic fields. Two Kinds of ultrasonic correlation systems are employed. The maximum velocity is observed at 38°C without distinction of frequency.
Kazuhiko Imano Kazuhiko Imano +1 more
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Nondestructive Evaluation of Magnetic Disk Heads Using a Photoacoustic Microscope
Japanese Journal of Applied Physics, 1997Nondestructive evaluation of magnetic disk heads is achieved using a photoacoustic microscope (PAM). A qualitative evaluation for gap or an isolation area of the heads is performed with photoacoustic amplitude and phase images. Resolution achieved is about 2 micrometer. A crack in a ferrite region and a bubble in a glass filler is observed
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Canadian Journal of Physics, 1986
Detection of ferromagnetic resonance (FMR) by photothermal beam deflection has been used to study the spatial inhomogeneity of magnetic properties. The technique has been applied to measure the depth dependence of FMR in layered recorder tapes and to determine the lateral variation of the demagnetizing field in metal–glass ribbons.
U. Netzelmann +3 more
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Detection of ferromagnetic resonance (FMR) by photothermal beam deflection has been used to study the spatial inhomogeneity of magnetic properties. The technique has been applied to measure the depth dependence of FMR in layered recorder tapes and to determine the lateral variation of the demagnetizing field in metal–glass ribbons.
U. Netzelmann +3 more
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New development of sensitive magnetic sensors for nondestructive evaluation of structural materials
SPIE Proceedings, 2005The diagnosis of iron-based materials was performed by using many magnetic sensors such as a small Hall element for leakage flux observations after polarizations, a locally sensitive fluxgate sensor available down to 100pT, by a pick-up coil for magnetic noise observation and by a triple-fold coil for eddy current detector.
Koji Yamada +4 more
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Carburization depth evaluation from magnetic nondestructive testing
NDT & E International, 2023Benjamin Ducharne +7 more
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Advanced Quantitative Magnetic Nondestructive Evaluation Methods — Theory and Experiment
1979The scale of fatigue crack phenomena is reviewed in relation to the size detection capabilities of nondestructive evaluation methods. Several features of the fatigue phenomena which should be considered in developing nondestructive characteriziation methods are tabulated and briefly discussed. A qualitative assessment of such factors in relation to the
J. R. Barton +3 more
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Carbon Nanotube Based Magnetic Tunnel Junctions for Electromagnetic Nondestructive Evaluation
MRS Proceedings, 2002AbstractSpin coherent transport in carbon nanotubes enables single-nanotube devices for magnetic field sensing. This unique transport property of single walled carbon nanotubes (SWCNTs) has been studied for development into advanced sensors for nondestructive evaluation (NDE).
Buzz Wincheski +3 more
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Nondestructive Evaluation of Irradiation Embrittlement of SQV2A Steel by Using Magnetic Method
AIP Conference Proceedings, 2006Irradiation embrittlement of SQV2A steel was evaluated by magnetic methods. Thermal aging (TA) and electron irradiation (EI) specimens were prepared to evaluate the thermal aging and the irradiation damage effects separately. B‐H loops changed with TA and EI.
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Numerical Consideration of Magnetic Camera for Quantitative Nondestructive Evaluation
Key Engineering Materials, 2004Jin Yi Lee, Do Won Seo, Tetsuo Shoji
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