Influence of hydrogen on the changes in the power of Barkhausen jumps in ferromagnets

Nazarchuk, Z. T.; Skal’s’kyi, V. R.; Klym, B. P.; Rudavs’kyi, V. D.; Velykyi, P. P.; Tolopko, Ya.D.

doi:10.1007/s11003-010-9229-9

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…In this con nection, an important question appears on stability of cyclic longevity of steel 20 at such temperatures in hydrogen containing media, when hydrogen is actively incorporated into metal, which is accompa nied by substantial worsening of its mechanical char acteristics (the influence of such media on metals is intensely studied in the recent time, see, for example, [14][15][16][17]). Let us list first results on the influence of hydrogen on steel 20.…”

Section: Elastic Hysteresismentioning

confidence: 99%

Mechanical properties of steel 20 at small deformations

et al. 2015

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Section: Elastic Hysteresismentioning

confidence: 99%

Mechanical properties of steel 20 at small deformations

et al. 2015

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“…This emission arises during the magnetization reversal of ferromagnets and is associated with the Barkhausen effect; in structural steels, the MAE is caused primarily by jumps of 90° domain walls [7][8][9][10][11][12].The implementation of the MAE method under actual operational conditions of ferromagnetic ele ments of structures provides the magnetization reversal of a certain volume of a diagnosed object. In this case, the locality and depth of the reversely magnetized region are very important.…”

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confidence: 99%

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Distribution of the induction of a quasi-stationary magnetic field created in a ferromagnet by an attachable electromagnet

Skal’skii

Klim

Pochapskii

2012

Russ J Nondestruct Test

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The magnetoelastic acoustic emission (MAE) method is a promising method for obtaining informa tion on the technical state of a ferromagnetic construction material [1][2][3][4][5][6]. This emission arises during the magnetization reversal of ferromagnets and is associated with the Barkhausen effect; in structural steels, the MAE is caused primarily by jumps of 90° domain walls [7][8][9][10][11][12].The implementation of the MAE method under actual operational conditions of ferromagnetic ele ments of structures provides the magnetization reversal of a certain volume of a diagnosed object. In this case, the locality and depth of the reversely magnetized region are very important. Therefore, calculating the spatiotemporal distribution of the induction of a quasi stationary magnetic field, which is created by an attachable electromagnet (AEM) in a ferromagnetic material, is an important problem. STATE OF INVESTIGATIONSSome results of experimental studies of the distribution of the induction of a stationary magnetic field that is created by an AEM in a ferromagnetic specimen are known from references [13][14][15]. Calculations that were based on the concept of an AEM-ferromagnetic specimen magnetic circuit were also carried out for a stationary case [16][17][18]. Theoretical approaches with consideration for Maxwell's equations ensure the calculation of the distribution of a stationary magnetic field, which is created by electromagnets of different configurations in a ferromagnetic system for several simple particular cases [19][20][21][22]. The results of numerical calculations of the induction of a stationary magnetic field that is created by a U shaped or solenoidal AEM in a ferromagnetic specimen are also known [23,24]. However, as was shown by the analysis of literature sources, data that contain the spatial and time distributions of the induction of a quasi stationary magnetic field that is created by an AEM in a ferromagnetic specimen are virtually absent [25].In our investigations, quasi stationary magnetic fields are considered because, in most cases, MAE is excited by using magnetization reversal frequencies ranging from fractions to units of hertz. Fields at such frequencies include the fields of electrotechnical devices that operate at commercial frequencies.In the quasi stationary electromagnetic approximation, the frequency of changes in the magnetiza tion reversing field is such that the delay effect (radiation effect) and displacement currents can be disre garded [25]. The predominant influence is exerted on electromagnetic processes by conduction currents, which also include eddy currents induced by an alternating magnetic field, in addition to currents from foreign forces that are induced by applied external stresses (as is observed in a stationary case). The value MAGNETIC METHODSAbstract-As a result of numerical calculations, the spatial and time distributions of the induction of a quasi stationary magnetic field, which was created in a studied ferromagnet by U shaped and sole noidal attachable elec...

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Methodology of Investigation of the Hydrogen Influence on Ferromagnet

Skalskyi,

Nazarchuk

2024

Springer-Aas Acoustics Series

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Influence of hydrogen on the changes in the power of Barkhausen jumps in ferromagnets

Cited by 4 publications

References 2 publications

Mechanical properties of steel 20 at small deformations

Mechanical properties of steel 20 at small deformations

Distribution of the induction of a quasi-stationary magnetic field created in a ferromagnet by an attachable electromagnet

Methodology of Investigation of the Hydrogen Influence on Ferromagnet

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