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Martin J. Sablik - One of the best experts on this subject based on the ideXlab platform.

  • Modeling Biaxial Stress effects on magnetic hysteresis in steel with the field and Stress axes noncoaxial
    Journal of Applied Physics, 1999
    Co-Authors: Martin J. Sablik, Bolesław Augustyniak, Marek Chmielewski
    Abstract:

    A model based on the domain wall pinning magnetomechanical hysteresis model of Sablik and Jiles [M. J. Sablik and D. C. Jiles, IEEE Trans. Magn. 29, 2113 (1993)] was formulated to compute changes in magnetic hysteresis under Biaxial Stress conditions with the magnetic field and Stress axes noncoaxial. The model included the Villari effect and other asymmetric Stress effects. The magnetic field was taken at various angles relative to the Stress axis. The Barkhausen noise, hysteresis loss, and maximum flux density were computed for fields varying between ±1 kA/m. The results compared favorably to experimental data on several steels—Polish St3 steel, Polish St41 steel, and US commercial grade steel pipe.

  • Biaxial Stress effects on hysteresis and MIVC
    Journal of Magnetism and Magnetic Materials, 1995
    Co-Authors: Martin J. Sablik, Hegeon Kwun, G.l. Burkhardt
    Abstract:

    Abstract Changes in the magnetic properties of a cruciform-shaped SAE-4130 steel specimen were measured under Biaxial Stress conditions. Compared to model predictions are the experimental remanence at various Biaxial Stresses and the magnetically induced velocity changes (MIVC) of ultrasonic shear and longitudinal waves propagated perpendicular to the Stress plane.

  • Modeling the Effects of Biaxial Stress on Magnetic Properties of Steels with Application to Biaxial Stress Nde
    Nondestructive Testing and Evaluation, 1995
    Co-Authors: Martin J. Sablik
    Abstract:

    Abstract This paper reviews recent work on the effect of Biaxial Stress on magnetic properties obtained from hysteresis loops. Both experimental and theoretical work are discussed. Biaxial Stress measurements were performed on SAE-4130 and mild steel cruciform specimens. The theoretical model, applied to polycrystalline steels, reduces the problem to that of computing an effective Stress and substituting that effective Stress into the Schneider-Cannell-Watts model for uniaxial Stress. The effective Stress under Biaxial Stress is equal to plus or minus one of the deviatoric (i.e distortional) normal Stress components. depending on whether tension or compression acts. and depending on which of the normal Stress axes is parallel to the applied magnetic field. Computer results are compared to experimental results. Good qualitative agreement is found. An NDE procedure for determining the Biaxial Stress difference from magnetic properties is discussed.

  • Biaxial Stress effects on magnetization perpendicular to the Stress plane
    IEEE Transactions on Magnetics, 1995
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, R.a. Langman
    Abstract:

    Effects of Biaxial Stress in steel on magnetization in a direction normal to the Stress plane were investigated both theoretically and experimentally. The two results, which agreed qualitatively, showed that the magnetization in the normal direction generally decreased with the absolute value of the sum of the two principal Stresses. The implication to nondestructive measurements of Biaxial Stress is discussed.

  • Micromagnetic model for the influence of Biaxial Stress on hysteretic magnetic properties
    Journal of Applied Physics, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. In particular, the formulation employs the Schneider–Cannell–Watts model and involves substitution of an effective Stress equal to one of the deviatoric (i.e., distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE‐4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically. It is also shown from the model and the data that a method can be formulated to nondestructively determine the difference in Biaxial Stresses.

R.a. Langman - One of the best experts on this subject based on the ideXlab platform.

  • Biaxial Stress effects on magnetization perpendicular to the Stress plane
    IEEE Transactions on Magnetics, 1995
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, R.a. Langman
    Abstract:

    Effects of Biaxial Stress in steel on magnetization in a direction normal to the Stress plane were investigated both theoretically and experimentally. The two results, which agreed qualitatively, showed that the magnetization in the normal direction generally decreased with the absolute value of the sum of the two principal Stresses. The implication to nondestructive measurements of Biaxial Stress is discussed.

  • Micromagnetic model for the influence of Biaxial Stress on hysteretic magnetic properties
    Journal of Applied Physics, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. In particular, the formulation employs the Schneider–Cannell–Watts model and involves substitution of an effective Stress equal to one of the deviatoric (i.e., distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE‐4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically. It is also shown from the model and the data that a method can be formulated to nondestructively determine the difference in Biaxial Stresses.

  • Micromagnetic model for Biaxial Stress effects on magnetic properties
    Journal of Magnetism and Magnetic Materials, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    Abstract A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. The formulation uses a modified version of the Kashiwaya model for the effect of Biaxial Stress on magnetic properties and combines it with the Schneider-Cannell-Watts model for magnetoelastic processes in steels. In particular, the model involves use of an effective Stress equal to one of the deviatoric (i.e. distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE-4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically.

G.l. Burkhardt - One of the best experts on this subject based on the ideXlab platform.

  • Biaxial Stress effects on hysteresis and MIVC
    Journal of Magnetism and Magnetic Materials, 1995
    Co-Authors: Martin J. Sablik, Hegeon Kwun, G.l. Burkhardt
    Abstract:

    Abstract Changes in the magnetic properties of a cruciform-shaped SAE-4130 steel specimen were measured under Biaxial Stress conditions. Compared to model predictions are the experimental remanence at various Biaxial Stresses and the magnetically induced velocity changes (MIVC) of ultrasonic shear and longitudinal waves propagated perpendicular to the Stress plane.

  • Biaxial Stress effects on magnetization perpendicular to the Stress plane
    IEEE Transactions on Magnetics, 1995
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, R.a. Langman
    Abstract:

    Effects of Biaxial Stress in steel on magnetization in a direction normal to the Stress plane were investigated both theoretically and experimentally. The two results, which agreed qualitatively, showed that the magnetization in the normal direction generally decreased with the absolute value of the sum of the two principal Stresses. The implication to nondestructive measurements of Biaxial Stress is discussed.

  • Micromagnetic model for the influence of Biaxial Stress on hysteretic magnetic properties
    Journal of Applied Physics, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. In particular, the formulation employs the Schneider–Cannell–Watts model and involves substitution of an effective Stress equal to one of the deviatoric (i.e., distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE‐4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically. It is also shown from the model and the data that a method can be formulated to nondestructively determine the difference in Biaxial Stresses.

  • Micromagnetic model for Biaxial Stress effects on magnetic properties
    Journal of Magnetism and Magnetic Materials, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    Abstract A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. The formulation uses a modified version of the Kashiwaya model for the effect of Biaxial Stress on magnetic properties and combines it with the Schneider-Cannell-Watts model for magnetoelastic processes in steels. In particular, the model involves use of an effective Stress equal to one of the deviatoric (i.e. distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE-4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically.

  • Application of hysteresis modeling to magnetic techniques for monitoring Biaxial Stress
    1993
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun
    Abstract:

    A probe, consisting of two excitation coils and a detection coil wrapped around a core with a Hall probe between the pole pieces, has been used to measure indirectly the influence of Biaxial Stress on the magnetic properties of a ferromagnetic specimen, in this case annealed SAE-4130 steel. Properties measured indirectly included remanence, coercivity, and first, third and fifth harmonic amplitudes. The properties were extracted from the voltage measured across the detection coil and incorporate the magnetic influence of the soft iron core, but with the effect of air gap variation between pole piece and sample kept to a controlled range. Results were compared to a micromagnetic model for the effect of Biaxial Stress on hysteresis and on magnetic properties. The micromagnetic model is a modified version of a model previously employed by Schneider et al. The experimental remanence variation due to Biaxial Stress compared very well to the predictions of the model. Furthermore, the model predict,s and experiment bears out, that the remanence with the field along one Stress axis minus the remanence with the field along the other Stress axis falls in a straight-line band of values when plotted against the difference of the two Stresses. This suggests a possible NDE technique for detecting differences in Biaxial Stresses at a given location in a steel specimen.

Hegeon Kwun - One of the best experts on this subject based on the ideXlab platform.

  • Biaxial Stress effects on hysteresis and MIVC
    Journal of Magnetism and Magnetic Materials, 1995
    Co-Authors: Martin J. Sablik, Hegeon Kwun, G.l. Burkhardt
    Abstract:

    Abstract Changes in the magnetic properties of a cruciform-shaped SAE-4130 steel specimen were measured under Biaxial Stress conditions. Compared to model predictions are the experimental remanence at various Biaxial Stresses and the magnetically induced velocity changes (MIVC) of ultrasonic shear and longitudinal waves propagated perpendicular to the Stress plane.

  • Biaxial Stress effects on magnetization perpendicular to the Stress plane
    IEEE Transactions on Magnetics, 1995
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, R.a. Langman
    Abstract:

    Effects of Biaxial Stress in steel on magnetization in a direction normal to the Stress plane were investigated both theoretically and experimentally. The two results, which agreed qualitatively, showed that the magnetization in the normal direction generally decreased with the absolute value of the sum of the two principal Stresses. The implication to nondestructive measurements of Biaxial Stress is discussed.

  • Micromagnetic model for the influence of Biaxial Stress on hysteretic magnetic properties
    Journal of Applied Physics, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. In particular, the formulation employs the Schneider–Cannell–Watts model and involves substitution of an effective Stress equal to one of the deviatoric (i.e., distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE‐4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically. It is also shown from the model and the data that a method can be formulated to nondestructively determine the difference in Biaxial Stresses.

  • Micromagnetic model for Biaxial Stress effects on magnetic properties
    Journal of Magnetism and Magnetic Materials, 1994
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun, L. A. Riley, P. Y. Cannell, K. T. Watts, R.a. Langman
    Abstract:

    Abstract A micromagnetic formulation has been developed for modeling the effect of Biaxial Stress on magnetoelastic processes in polycrystalline steels. The formulation uses a modified version of the Kashiwaya model for the effect of Biaxial Stress on magnetic properties and combines it with the Schneider-Cannell-Watts model for magnetoelastic processes in steels. In particular, the model involves use of an effective Stress equal to one of the deviatoric (i.e. distortional) normal Stress components, depending on whether the field is parallel to a tensile or compressive axis or to the third axis perpendicular to the plane of Biaxial Stress. Computer results are compared to experimental results on the effects of Biaxial Stress on magnetic properties in mild steel and in SAE-4130 steel. Good qualitative agreement is found in almost all cases, in that in going from one Biaxial Stress case to the next, the same kinds of changes are seen magnetically.

  • Application of hysteresis modeling to magnetic techniques for monitoring Biaxial Stress
    1993
    Co-Authors: Martin J. Sablik, G.l. Burkhardt, Hegeon Kwun
    Abstract:

    A probe, consisting of two excitation coils and a detection coil wrapped around a core with a Hall probe between the pole pieces, has been used to measure indirectly the influence of Biaxial Stress on the magnetic properties of a ferromagnetic specimen, in this case annealed SAE-4130 steel. Properties measured indirectly included remanence, coercivity, and first, third and fifth harmonic amplitudes. The properties were extracted from the voltage measured across the detection coil and incorporate the magnetic influence of the soft iron core, but with the effect of air gap variation between pole piece and sample kept to a controlled range. Results were compared to a micromagnetic model for the effect of Biaxial Stress on hysteresis and on magnetic properties. The micromagnetic model is a modified version of a model previously employed by Schneider et al. The experimental remanence variation due to Biaxial Stress compared very well to the predictions of the model. Furthermore, the model predict,s and experiment bears out, that the remanence with the field along one Stress axis minus the remanence with the field along the other Stress axis falls in a straight-line band of values when plotted against the difference of the two Stresses. This suggests a possible NDE technique for detecting differences in Biaxial Stresses at a given location in a steel specimen.

M.g Maylin - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Biaxial Stress on martensitic steels
    Journal of Magnetism and Magnetic Materials, 2001
    Co-Authors: G.j Tomka, N Murray, J.g Gore, J Earl, P.t Squire, M.g Maylin
    Abstract:

    Magnetisation measurements have been made using Biaxial-Stress apparatus on a thin martensitic-steel disc. To an approximation, the effect of tension in the field direction (Sx) has an equivalent effect on the magnetic properties to a perpendicular compression (−Sy), so that the effective Stress, Seff=Sx−Sy. Departures from this relationship may be due to changes in coercivity with orientation of effective easy axes. A reversal mechanism more like coherent rotation or nucleation rather than pinning can account for these deviations

  • Apparatus for magnetic measurements under Biaxial Stress
    IEEE Transactions on Magnetics, 2000
    Co-Authors: J. Pearson, M.g Maylin, P.t Squire, J.g Gore
    Abstract:

    Apparatus for observing the effects of Biaxial Stress on discs of soft ferromagnetic materials is described. The apparatus is optimized for fundamental studies of Stress-induced magnetization changes and the Stress dependence of hysteresis parameters. Out-of-plane anisotropy is minimized by the use of a novel method of measuring the magnetization, based on a Hall probe near the surface. The system currently operates with applied fields up to 30 kA/m and Stress magnitudes in orthogonal directions up to 50 MPa. Illustrative results for the isofield Stress-induced irreversible magnetization changes in pure iron are presented in the form of contour plots.

  • Biaxial Stress effects on the magnetic properties of pure iron
    IEEE Transactions on Magnetics, 2000
    Co-Authors: J. Pearson, M.g Maylin, P.t Squire, J.g Gore
    Abstract:

    The effects of Biaxial Stress on the magnetic properties of pure iron discs are reported. IsoStress changes in the coercivity are well described by an effective Stress /spl sigma//sub EFF/=/spl sigma//sub x/-/spl sigma//sub y/. Irreversible, Stress-induced magnetization changes are presented in the form of contours in the (/spl sigma//sub x/,/spl sigma//sub y/) plane. These can be usefully described by a nine-coefficient polynomial in /spl sigma//sub x/ and /spl sigma//sub y/.