scispace - formally typeset
Search or ask a question
Journal ArticleDOI

The effect of compressive plastic deformation on the magnetic properties of AISI 4130 steels with various microstructures

14 Jul 1988-Journal of Physics D (IOP Publishing)-Vol. 21, Iss: 7, pp 1196-1204
TL;DR: 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.
Citations
More filters
Journal ArticleDOI
TL;DR: In this article, the results of magnetic measurements performed on specially prepared steel samples were made after the samples had been uniaxially plastically deformed and the applied stress removed.

121 citations

Journal ArticleDOI
TL;DR: The magnetic properties of a number of specimens of AISI 1000 series plain carbon steels have been measured as functions of chemical composition, microstructure and heat treatment as mentioned in this paper, and the results showed that for a given morphology of the carbides the magnetic properties such as coercivity and permeability varied smoothly as a function of carbon content.
Abstract: The magnetic properties of a number of specimens of AISI 1000 series plain carbon steels have been measured as functions of chemical composition, microstructure and heat treatment. The results showed that for a given morphology of the carbides the magnetic properties such as coercivity and permeability varied smoothly as a function of carbon content. Coercivity increased with carbon content by 2.0 Oe for every 0.1 wt.% carbon added at low carbon contents while initial permeability decreased by 57% on the addition of 0.2 wt.% carbon in the form of lamellar carbides (pearlite), but by only 21% when those carbides were in the form of spheroidised particles. In all cases the spheroidised specimens were found to be magnetically softer than the lamellar specimens and the difference increased with the amount of carbon present. Grain size did not seem to affect the magnetic properties significantly above a carbon content of 0.2 wt.%, although it was known that grain size is a significant factor in determining magnetic properties in iron alloys with lower carbon content.

94 citations

Journal ArticleDOI
TL;DR: In this article, the bulk magnetic properties of pearlitic steels were measured in-situ during plastic deformation and the coercive field remained constant or decreased with increasing stress at lower values of tension, but higher stress levels produced an increase attributed to new pinning sites generated by the deformation process.

73 citations

Journal ArticleDOI
TL;DR: In this article, the effects of residual stress and pinning effects of dislocation tangles were found to combine to cause the changes in the magnetic properties of low carbon pearlitic steels.

69 citations

Journal ArticleDOI
TL;DR: In this article, the deformation of a low carbon steel with plastic tension has been investigated after unloading by magnetic methods (hysteresis and Barkhausen noise (BN) emission).

48 citations

References
More filters
Journal ArticleDOI
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.

1,989 citations

Journal ArticleDOI
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.
Abstract: A theory of the magnetisation process in ferromagnets, based on existing ideas of domain rotation and domain wall motion is presented. This has been developed via a consideration of the various energy terms into a mathematical description of the process leading to an equation of state for a ferromagnet. The differential equation has been solved and a solution containing terms up to the second order presented, showing the essential features of ferromagnetic hysteresis. The theory has then been used to explain the effects of stress on magnetisation. It has been found that the magnetisation approaches the anhysteretic curve when a ferromagnet is subjected to stress and this is the underlying principle behind such changes in magnetisation. The change of magnetisation with stress can not be predicted solely on the basis of the magnetostriction coefficient except in special cases when the initial (zero stress) conditions of magnetisation lie on the anhysteretic. This condition is also approximately satisfied at higher fields.

286 citations

Journal ArticleDOI
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.
Abstract: A model is presented for the stress‐dependent effective field, which when used in conjunction with the Jiles–Atherton theory, qualitatively accounts for (1) the change in slope and shape of the hysteresis curves with uniaxial stress and (2) the convexity of the curves depicting remanent and peak magnetization as a function of stress. Also, the model can produce the Villari reversal if parameters are selected appropriately.

137 citations