Results 151 to 160 of about 2,670,483 (201)
Some of the next articles are maybe not open access.
Barkhausen Noise and Magnetic Amplifiers. II. Analysis of the Noise
Journal of Applied Physics, 1949The Barkhausen noise is calculated for ferromagnetic cores used in magnetic amplifiers. The method of analysis follows that used in the analysis of the shot effect. The signal-to-noise ratio for a typical magnetic amplifier circuit is calculated and compared with experiment.
Krumhansl, J. A., Beyer, R. T.
openaire +1 more source
Magnetic Barkhausen Noise for Characterization of Recovery and Recrystallization
IEEE Transactions on Magnetics, 2010The capacity of magnetic Barkhausen noise (MBN) measurements to characterize recovery and the onset and evolution of recrystallization processes occurring during the annealing of cold rolled low carbon steel is analyzed. Cold rolled low carbon steel samples were isothermally annealed at laboratory under different conditions in order to promote various ...
Gurruchaga-Echeverria, K. (Kizkitza) +3 more
openaire +2 more sources
Influence of magnetizing parameters on the magnetic Barkhausen noise
IEEE Transactions on Magnetics, 1992Magnetic Barkhausen noise (MBN) measurements were made on a sample of pipeline steel as functions of magnetizing frequency and AC flux density in the sample. The observed MBN responses suggest a strong dependence on these magnetizing parameters. With increasing flux density in the sample, the MBN activity initially increases but finally begins to ...
A. Dhar, D.L. Atherton
openaire +1 more source
A System for Controllable Magnetic Measurements of Hysteresis and Barkhausen Noise
IEEE Transactions on Instrumentation and Measurement, 2015A specially developed setup for precise measurement of the magnetic hysteresis and Barkhausen noise is presented in this work. A novelty of the setup consists in a unique combination of two main features: an accurate local determination of the magnetic field and an improved feedback control of the magnetization process.
Alexandr Stupakov +2 more
openaire +1 more source
MAGNETIC BARKHAUSEN NOISE INDICATORS OF CRACKS IN STEEL
Nondestructive Testing and Evaluation, 1997High resolution magnetic Barkhausen noise (MBN) measurements were performed on cracks that were present in a section of 390 mm diameter and 29 mm thick steel pipe. The MBN indicators considered were the MBN energy signal, the number of events, and the variation of pulse height distributions (PHD) in the crack vicinity.
Thomas W Krause, D L Atherton
exaly +2 more sources
Barkhausen Noise and Magnetic Amplifiers. I. Theory of Magnetic Amplifiers
Journal of Applied Physics, 1949An analysis is made of the operation of magnetic amplifiers or non-linear transformers. Open circuit output voltages are calculated for transformers driven by a sinusoidal primary current, and also for sinusoidal primary current plus a direct current bias. The case of a loaded secondary is also considered and it is shown that there exist conditions for
Krumhansl, J. A., Beyer, R. T.
openaire +2 more sources
Magnetic Barkhausen noise measurements on magnetized pipeline steel
Insight - Non-Destructive Testing and Condition Monitoring, 2003Magnetic barkhausen noise measurements on magnetized pipeline steel. Magnetic Barkhausen Noise (MBN) is created by the irreversible motion of 180-degree domain walls. It is sensitive to residual and applied stress in ferromagnetic materials such as pipeline steel and has therefore been proposed as a viable non- destructive evaluation technique for ...
A Hsu, L C Clapham, D L Atherton
openaire +1 more source
Magnetic Barkhausen noise analysis of stress in steel
Current Applied Physics, 2004Abstract When a changing magnetic field is applied to a magnetic material, the domain walls move so domains aligned close to the field direction grow at the expense of those that are less aligned. The movement occurs in a series of sudden jumps leading to magnetic Barkhausen noise (MBN).
D.M. Stewart, K.J. Stevens, A.B. Kaiser
openaire +1 more source
Analog of the induction law for the magnetic Barkhausen noise
Journal of Magnetism and Magnetic Materials, 2020Abstract The influence of coil turn number n and sample cross-section S on the Barkhausen noise signal has been studied. Combining the obtained results with our recent findings on the dynamic properties of the magnetic Barkhausen noise, we propose a Faraday-like relation for its rms envelope in the form U rms ( H ) ∝ n S · dH /
Alexandr Stupakov, Alexej Perevertov
openaire +1 more source
Barkhausen Noise and Size Effects in Magnetic Microstructures
Journal of Applied Physics, 2001The properties of the Barkhausen noise in a series of permalloy squares have been measured with a magneto-optical hysteresigraph. The magnetic structures have been litographically defined in a permalloy film (thickness 160 nm) as squares having a size from 20 to 320 μm.
L. Callegaro, PUPPIN, EZIO
openaire +4 more sources