Modeling of Plastic Deformation Effects in Ferromagnetic Thin Films

Sablik, M. J.; Geerts, Wilhelmus; Smith, K.; Gregory, A.R.; Moore, C.; Palmer, D.; Bandyopadhyay, Anup; Landgraf, Fernando José Gomes; Campos, Marcos Flávio de

doi:10.1109/tmag.2009.2033456

Cited by 22 publications

(11 citation statements)

References 6 publications

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“…[4] and Sablik in Refs. [22] and [29]; and the others introduced the decomposition of H σ into the magneto-elastic H σ e induced by elastic deformation and the magneto-plastic H σ p induced by plastic deformation, such as Wang in Ref. [5] and Li in Ref.…”

Section: The Effective Magnetic Field H Ementioning

confidence: 99%

“…Nevertheless, some researchers claimed that the anhysteretic magnetization should be given as an implicit of itself [21,22,30] M an = M s coth…”

Section: The Anhysteretic Magnetization M Anmentioning

confidence: 99%

“…Li et al [18,19] applied the Rayleigh law to the stress, as well as a new linear stress-dependent term σ ± ηE to improve the agreement near zero stress. During the stage of plastic deformation, Leng, [4] Wang, [5] Li, [6] Jiles, [20] Sablik, [21,22] Lo, [23] et al analyzed the effect of plastic deformation and stress on the parameters, such as pinning constant k and coupling coefficient α, and derived different magnetomechanical models for plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

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Modified magnetomechancial model in the constant and low intensity magnetic field based on J–A theory

et al. 2017

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The existing magnetomechancial models cannot explain the different experimental phenomena when the ferromagnetic specimen is respectively subjected to tension and compression stress in the constant and low intensity magnetic field, especially in the compression case. To promote the development of magnetomechancial theory, the energy conservation equation, effective magnetic field equation, and anhysteretic magnetization equation of the original Jiles-Atherton (J-A) theory are elucidated and modified, an equation of the local equilibrium status is employed and the differential expression of the modified magnetomechancial model based on the modified J-A theory is established finally. The effect of stress and plastic deformation on the magnetic parameters is analyzed. An excellent agreement is achieved between the theoretic predictions by the present modified model and the previous experimental results. Comparing with the calculation results given by the existing models and experimental results, it is seen indeed that the modified magnetomechanical model can describe the different magnetization features during tension-release and compression-release processes much better, and is the only one which can accurately reflect the experimental observation that the magnetic induction intensity reverses to negative value with the increase of the compressive stress and applied field.

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Section: The Effective Magnetic Field H Ementioning

confidence: 99%

“…Nevertheless, some researchers claimed that the anhysteretic magnetization should be given as an implicit of itself [21,22,30] M an = M s coth…”

Section: The Anhysteretic Magnetization M Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modified magnetomechancial model in the constant and low intensity magnetic field based on J–A theory

et al. 2017

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“…Later, based on the law of approach and effective field theory, the magnetomechanical effect was modelled theoretically by Jiels and Atherton and Sablik . This model theory was successively verified by Maylin and Squire, and has been widely used because of its relative consistency with experimental results . Further work by Jiles and Li modified the model theory based on the Rayleigh law.…”

Section: Introductionmentioning

confidence: 99%

Correlation between uniaxial ratcheting and magnetic response under cyclic loadings in X80 pipeline steel

Bao

et al. 2018

Strain

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The objective of this research is to explore the correlation between uniaxial ratcheting behaviour and magnetic response under asymmetrical cyclic stressing in X80 pipeline steel. The magnetic field variations from cycle to cycle were recorded simultaneously during ratcheting. Analysis made in the present work shows that the magnetic hysteresis loop evolves systematically with the number of cycles in terms of its shape and position. The most prominent result here is that the magnetic field under a certain stress first decreases sharply in the preliminary stage of ratcheting, followed by a stable decreasing period with an approximately linear slope. Furthermore, it can be concluded that ratcheting influences the changes in magnetic field more significantly under tensile stress than compressive stress. The underlying reason of the strong non‐linearity of the magnetic field evolution was discussed.

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“…Leng [16,17] explained the major effect of the initial remanent states on the variation of the magnetic memory signals and the different variation characteristics of the MMM signals in the elastic and plastic ranges using the effective field theory and the law of approach. Based on the work of Sablik [18], Wang [19] and Li [20] modified the J-A model to describe the relationship between the material's plastic deformation and the MMM signal.…”

Section: Introductionmentioning

confidence: 99%

Discussion of modified Jiles-Atherton model including dislocations and plastic strain

Chen

et al. 2015

International Journal of Applied Electromagnetics and Mechanics

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In metal magnetic memory (MMM) detection, the Jiles-Atherton model describes material magnetization caused by the geomagnetic field and cyclic stress. However, characterization of the effects of fatigue damage on magnetization remains an issue. In this paper, an expression for magnetization intensity M0 related to dislocation and plastic strain amplitude εp was incorporated into a modified Jiles-Atherton model. To validate the M0 expression, standard tensile fatigue tests were performed. Results indicate that the domain wall pinning parameter k1 in M0 is linear in both dislocation density ρ and average dislocations slippage distanceλ, as is also the shear plastic strain amplitude in the stress control fatigue. The stress amplitude in strain control fatigue however is linear with respect to ρ 1/2 . Therefore, M0 can be expressed as a function of stress and εp (orλ and stress amplitude). Experiments showed that calculated M0 variations in fatigue development processes can reflect a variation law in the MMM signal, with certain differences. There is a numerical difference between Hpx and M0 because the surface magnetic field is much weaker than that within the ferromagnetic material. Hpx increases after macro crack initiation caused by an additional material demagnetization field and a leakage field near the crack during cracking.

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Modeling of Plastic Deformation Effects in Ferromagnetic Thin Films

Cited by 22 publications

References 6 publications

Modified magnetomechancial model in the constant and low intensity magnetic field based on J–A theory

Modified magnetomechancial model in the constant and low intensity magnetic field based on J–A theory

Correlation between uniaxial ratcheting and magnetic response under cyclic loadings in X80 pipeline steel

Discussion of modified Jiles-Atherton model including dislocations and plastic strain

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