Magnetic properties of stainless steels at room and cryogenic temperatures

Oxley, Paul; Goodell, Jennifer; Molt, Robert W.

doi:10.1016/j.jmmm.2009.01.002

Cited by 47 publications

(18 citation statements)

References 20 publications

(31 reference statements)

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“…This plot and function allow to select f M to fabricate a ferromagnetic cylinder of desired µ r . The magnetic permeability at liquid nitrogen temperature is smaller than at room temperature, which we attribute to an increase in the anisotropy constant [16]. This needs to be accounted for when selecting f M .…”

Section: Ferromagnetic Shells For Magnetic Field Cloakingmentioning

confidence: 90%

“…To fabricate a ferromagnetic shell, we mix 430 stainless steel powder (magnetic permeability µ ≈ 1000 [16]) with commercial epoxy and pour the mixture into a tubular mold. We keep the mold upright to help air bubbles accumulate at the top and invert it every minute for 30 minutes to prevent the steel powder from setting while the epoxy is hardening.…”

Section: 5 Inch Long / 4-layer and 45 Inch Long / 45-layer Hts Cloakmentioning

confidence: 99%

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A magnetic field cloak for charged particle beams

Capobianco-Hogan

Cervantes

Deshpande

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Shielding charged particle beams from transverse magnetic fields is a common challenge for particle accelerators and experiments. We demonstrate that a magnetic field cloak is a viable solution. It allows for the use of dipole magnets in the forward regions of experiments at an Electron Ion Collider (EIC) and other facilities without interfering with the incoming beams. The dipoles can improve the momentum measurements of charged final state particles at angles close to the beam line and therefore increase the physics reach of these experiments. In contrast to other magnetic shielding options (such as active coils), a cloak requires no external powering. We discuss the design parameters, fabrication, and limitations of a magnetic field cloak and demonstrate that cylinders made from 45 layers of YBCO high-temperature superconductor, combined with a ferromagnetic shell made from epoxy and stainless steel powder, shield more than 99% of a transverse magnetic field of up to 0.45 T (95 % shielding at 0.5 T) at liquid nitrogen temperature. The ferromagnetic shell reduces field distortions caused by the superconductor alone by 90% at 0.45 T.

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Section: Ferromagnetic Shells For Magnetic Field Cloakingmentioning

confidence: 90%

Section: 5 Inch Long / 4-layer and 45 Inch Long / 45-layer Hts Cloakmentioning

confidence: 99%

A magnetic field cloak for charged particle beams

Capobianco-Hogan

Cervantes

Deshpande

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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“…16. The data is adapted from the available information in [30][31][32][33]. Thecurve defines the relative permeability of material, , according to magnetic flux density, and magnetic field strength, , based on the following equation:…”

Section: B Magnetic Properties Of Vacoflux-50mentioning

confidence: 99%

Magnetic Circuit Analysis and Fluid Flow Modeling of an MR Damper With Enhanced Magnetic Characteristics

2020

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A novel design of a magnetorheological (MR) damper is developed, fabricated, modelled and tested. The design includes some features that enhance the magnetic characteristics of the damper. The iron-cobalt-vanadium "Vacoflux-50" alloy and the "AMT-Smartec + " MR fluid, whose magnetic characteristics have been predicted to enhance the performance of the damper, are employed in the new design. Moreover, the location of the MR fluid region in the piston construction has been chosen so that the magnetic field maximises. To evaluate the impact of the proposed design improvements, an approach to modelling the performance of a previously-tested MR damper of a different design, different magnetic material, and different MR fluid has been developed. The approach combines a Finite Element Analysis (FEA) of the magnetic circuit, and a nonlinear analytical model of fluid flow. The results of the FE/analytical approach have been validated using the available published results of the same damper. Hence, the approach has been used to predict the performance of the same damper due to the employment of the proposed design improvements. The FE/analytical approach accounts for the nonlinear characteristics caused by the magnetic saturation of materials and the effects of fluid compressibility and aeration in the damper. It has been found that the implementation of the proposed design features leads to a remarkable increase in the magnetic field and the fluid yield stress. Also, the inclusion of the nonlinear magnetic and fluid flow characteristics have been found to affect the magnetic field distribution and the fluid yield stress greatly.

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“…The grain boundaries act as pinning centers for dw pinning [ 30–32 ] and therefore result in larger coercivities. [ 33–37 ] Dislocations and residual stresses in the material due to deformation also lead to an increase in coercivity. [ 38–40 ] Residual stress results in preferred directions of magnetization and therefore in magnetoelastic anisotropy.…”

Section: Ferritic Steelmentioning

confidence: 99%

Magnetic Coding of Steel for Industrial Internet Applications

Goll

Kresse

Schuller

et al. 2020

Physica Status Solidi (a)

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Ferritic steel has the potential to act as a medium for magnetic storage of certain information, for example, to document the history of parts. The material is expected to play a role in supporting intelligent production processes and logistics routines for industrial internet applications. For writing and reading stable magnetic codes into steel, it is necessary to investigate and understand the corresponding requirements of the material. Both sensitively depend on characteristic microstructural details and related magnetic properties. They are either already present in the material or may be locally achieved in the code area by supplementary hardening methods.

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Magnetic properties of stainless steels at room and cryogenic temperatures

Cited by 47 publications

References 20 publications

A magnetic field cloak for charged particle beams

A magnetic field cloak for charged particle beams

Magnetic Circuit Analysis and Fluid Flow Modeling of an MR Damper With Enhanced Magnetic Characteristics

Magnetic Coding of Steel for Industrial Internet Applications

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