Results 161 to 170 of about 2,693 (205)

Problems of Evaluation of the Flaw Parameters in the Magnetic Nondestructive Testing

Russian Journal of Nondestructive Testing, 2002
The magnetic leakage fields are investigated experimentally on rectangular-slit aw models for various magnetizing fields H0. It is shown that in certain cases the aw parameters can be incorrectly classified as a result of coincidence of their leakage fields.
A. I. Pashagin, N. P. Benklevskaya, V. E. Shcherbinin   +2 more
openaire   +1 more source

Nondestructive detection of cracks in a distribution line by evaluating magnetic field distribution

Digest of INTERMAG 2003. International Magnetics Conference (Cat. No.03CH37401), 2003
Detecting cracks in a power distribution line nondestructively will be possible through proposed evaluation of the magnetic field distribution around the line when it is energized. The authors have examined and simulated the distribution of the magnetic field around a conducting wire. They confirmed the feasibility of this method and suggested that the
T. NONAKA, H. YOSHIMI, F. SATO, H. MATSUKI, T. SATO   +4 more
openaire   +1 more source

Review of magnetic methods for nondestructive evaluation

NDT International, 1988
Abstract This paper provides a guideline to the literature of magnetic techniques for nondestructive evaluation. Compared with other NDE methods such as ultrasonics or eddy currents, the literature for magnetic methods is relatively small, but one of the difficulties is that it is widely scattered.
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Magnetic nondestructive evaluation of thermally degraded 2.25Cr–1Mo steel

Materials Letters, 2004
Abstract Aging was performed to understand the microstructural degradation in 2.25Cr–1Mo steel. Microstructural parameters (mean equivalent carbide size, number of carbides per unit area), mechanical properties (UTS, Vickers hardness) and magnetic properties (coercivity, remanence) were measured to investigate the relationship among these parameters.
Jai Won Byeon, S.I. Kwun
openaire   +1 more source

Magnetic Nondestructive Evaluation Techniques for Inspection of Railroad Bridges

1995
The integrity of large scale structural systems such as bridges is an area of prime concern at this time because many of these bridges currently in use have been in service longer than originally intended (Fisher, 1989). Failure of these structures is often caused by fatigue cracks as a result of cyclic loading.
M. R. Govindaraju, M. K. Devine, S. B. Biner, D. C. Jiles   +3 more
openaire   +1 more source

Magnetic susceptibility imaging for nondestructive evaluation (using SQUID magnetometer)

IEEE Transactions on Applied Superconductivity, 1993
High-resolution superconducting magnetometers such as MicroSQUID (superconducting quantum interference device) have been shown to be effective for nondestructive evaluation. MicroSQUID can also be used with a room-temperature magnet to image the magnetic susceptibility of materials.
J.P. Wikswo, Y.P. Ma, N.G. Sepulveda, S. Tan, I.M. Thomas, A. Lauder   +5 more
openaire   +1 more source

Nondestructive evaluations of iron-based material by magnetic diagnosis tools

International Journal of Applied Electromagnetics and Mechanics, 2000
Magnetic properties have been investigated for a diagnosis tool of iron-based material of A533B, SUS304 in an applied stress range up to 640 MPa, by using a leakage magnetic flux sensor of GaAs Hall element, a magnetic noise pickup coil and by observing X-ray diffraction.
Yamada, Koji, Shoji, Shin-ichi, Isobe, Yosihiro   +2 more
openaire   +1 more source

Detection Probability Improvement for Nondestructive Evaluation Using a Magnetic Camera

Key Engineering Materials, 2006
It is important to estimate the intensity distribution of a magnetic field as a possible magnetic method in an industrial nondestructive evaluation application. A magnetic camera provides the distribution of a quantitative magnetic field with homogeneous lift-off and same spatial resolution.
Jin Yi Lee, Ji Seoung Hwang, Se Ho Choi, Jae Kyoo Lim   +3 more
openaire   +1 more source

Review of magnetic methods for nondestructive evaluation (Part 2)

NDT International, 1990
Abstract This paper gives a guideline to the literature of magnetic methods for nondestructive evaluation of materials for flaws and defects. This is a sequel to an earlier paper which described magnetic methods for nondestructive evaluation of stress, plastic deformation and microstructure.
openaire   +1 more source

Nondestructive Evaluation of Mechanical Property by Appratus for Magnetic Measurements of Charpy Test Pieces

INTERMAG 2006 - IEEE International Magnetics Conference, 2006
Since the magnetic and mechanical properties of steels are well correlated, the mechanical properties of steels can be evaluated by measuring their magnetic properties. Therefore, an apparatus for measuring the BH curves of Charpy impact test pieces was developed in order to nondestructively evaluate the integrity of nuclear reactor pressure vessels ...
H. Kikuchi, M. Harada, K. Ara, Y. Kamada, S. Kobayashi, S. Takahashi   +5 more
openaire   +1 more source