Journal ArticleDOI
The effect of compressive plastic deformation on the magnetic properties of AISI 4130 steels with various microstructures
TLDR
The magnetic properties of AISI 4130 steel after eight heat treatments have been investigated as discussed by the authors, and properties such as hysteresis loss, coercivity and initial permeability were found to be closely interrelated.Abstract:
The magnetic properties of AISI 4130 steel after eight heat treatments have been investigated. Properties such as hysteresis loss, coercivity, and initial permeability were found to be closely interrelated. Furthermore, they were each dependent on the hardness of the material. A relationship between the hardness and permeability was found which was microstructure independent. These parameters were also found to change in a systematic way with plastic deformation and this result can be used for non-destructive evaluation. Correlations between the magnetic parameters were also found to change in a systematic way with plastic deformation and this result can be used for non-destructive evaluation. Correlations between the magnetic parameters revealed relationships which depended on the microstructure of the material. The residual stress in steels can be determined from the changes in maximum differential permeability.read more
Citations
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Magnetic anisotropy of plastically deformed low-carbon steel
TL;DR: In this paper, a comprehensive magnetic investigation of structural low-carbon steel subjected to uniaxial plastic tension was carried out and the applied applicability of the examined techniques for the non-destructive characterization of steel degradation was discussed.
Journal ArticleDOI
Nondestructive evaluation of creep damage in power-plant steam generators and piping by magnetic measurements
TL;DR: In this paper, the authors used magnetic hysteresis measurements to evaluate creep damage in power plant weldments and found that during high temperature creep there is a significant change in microstructure such as the formation of voids, dislocation networks and grain boundary cavities.
Journal ArticleDOI
Dipole modeling of stress-dependent magnetic flux leakage
TL;DR: In this paper, an improved magnetic dipole model is proposed to investigate the stress-dependent MFL in tensioned specimens of Q235 steel, which can reveal the effect of the stress concentration on the induced MFL signals and is also applicable to solve the inverse problem for estimating the shapes and sizes of the defects even though the stress is involved.
Journal ArticleDOI
Measuring stress variation with depth using Barkhausen signals
TL;DR: In this paper, a parametric model for the frequency spectrum of Barkhausen emissions is used to detect variations of stress along depth in ferromagnetic materials, which can be used for non-destructive evaluation of residual stress-depth profiles in aerospace components, thus helping to prevent catastrophic failures.
Journal ArticleDOI
The magnetic detection of material properties
TL;DR: In this paper, the authors have shown that magnetic hysteresis and the Barkhausen effect can be used to investigate the condition of materials or components by nondestructive means.
References
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Journal ArticleDOI
Theory of ferromagnetic hysteresis
David Jiles,David L. Atherton +1 more
TL;DR: In this paper, a mathematical model of the hysteresis mechanisms in ferromagnets is presented based on existing ideas of domain wall motion including both bending and translation, which gives rise to a frictional force opposing the movement of domain walls.
Journal ArticleDOI
Review of progress in quantitative NDE: Williamsburg, VA, USA, 21–26 June 1987
Journal ArticleDOI
Theory of the magnetisation process in ferromagnets and its application to the magnetomechanical effect
David Jiles,David L. Atherton +1 more
TL;DR: A theory of the magnetisation process in ferromagnets, based on existing ideas of domain rotation and domain wall motion is presented in this article, which has been developed via a consideration of the various energy terms into a mathematical description leading to an equation of state for a ferromagnet.
Journal ArticleDOI
Ueber die Aenderungen des magnetischen Moments, welche der Zug und das Hindurchleiten eines galvanischen Stroms in einem Stabe von Stahl oder Eisen hervorbringen
Journal ArticleDOI
Model for the effect of tensile and compressive stress on ferromagnetic hysteresis
TL;DR: In this article, a model for the stress-dependent effective field was presented, which when used in conjunction with the Jiles-Atherton theory, qualitatively accounts for the change in slope and shape of the hysteresis curves with uniaxial stress and convexity of the curves depicting remanent and peak magnetization as a function of stress.