Analytical modelling of a magnetization curve obtained by the measurements of magnetic materials’ properties using evolutionary algorithms

2017 ◽  
Vol 52 ◽  
pp. 387-408 ◽  
Author(s):  
Marko Jesenik ◽  
Miloš Beković ◽  
Anton Hamler ◽  
Mladen Trlep
Keyword(s):  
Evolutionary Algorithms ◽  
Magnetic Materials ◽  
Magnetization Curve ◽  
Analytical Modelling ◽  
Materials Properties

scholarly journals Ab initio study of electronic temperature effects on magnetic materials properties

2019 ◽  
Vol 99 (17) ◽  
Author(s):  
Philippe Scheid ◽  
Gregory Malinowski ◽  
Stéphane Mangin ◽  
Sébastien Lebègue
Keyword(s):  
Ab Initio ◽  
Magnetic Materials ◽  
Temperature Effects ◽  
Ab Initio Study ◽  
Electronic Temperature ◽  
Materials Properties

Combining multi-objective evolutionary algorithms and descriptive analytical modelling in energy scenario design

2016 ◽  
Vol 164 ◽  
pp. 140-151 ◽  
Author(s):  
Md Shahriar Mahbub ◽  
Marco Cozzini ◽  
Poul Alberg Østergaard ◽  
Fabrizio Alberti
Keyword(s):  
Evolutionary Algorithms ◽  
Analytical Modelling ◽  
Multi Objective ◽  
Scenario Design ◽  
Energy Scenario

Magnetic MEMS used in smart structures which exploit magnetic materials properties

2001 ◽  
Author(s):  
Ronald B. Zmood ◽  
LiJiang Qin ◽  
Dinesh K. Sood ◽  
Thurai Vinay ◽  
D. Meyrick
Keyword(s):  
Magnetic Materials ◽  
Smart Structures ◽  
Materials Properties

scholarly journals Anhysteretic Magnetization Measurement Methods for Soft Magnetic Materials

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2021 ◽  
Author(s):  
Michał Nowicki
Keyword(s):  
Magnetic Materials ◽  
Magnetization Curve ◽  
Nanocrystalline Material ◽  
Magnetization Measurement ◽  
Soft Magnetic Materials ◽  
New Method ◽  
Soft Magnetic ◽  
Zn Ferrite ◽  
Anhysteretic Magnetization ◽  
Speed And Accuracy

This article is concerned with the methods for experimentally determining the Anhysteretic Magnetization curve for soft magnetic materials. A new method based on the modern hysteresisgraph system is presented. Known modern and traditional methods based on fluxmeters are presented as well. The experimental results obtained with the described methods for isotropic Mn–Zn ferrite are compared. Lastly, results of validation on NANOPERM® nanocrystalline material are detailed and show negligible hysteresis. The new method allows for accurate Anhysteretic Magnetization curve measurement without software or hardware modifications of standard, commercially available hysteresisgraph systems. The speed and accuracy of the results are improved in comparison with other methods.

scholarly journals Experimental Verification of Isotropic and Anisotropic Anhysteretic Magnetization Models

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1549 ◽  
Author(s):  
Michał Nowicki ◽  
Roman Szewczyk ◽  
Paweł Nowak
Keyword(s):  
Magnetic Materials ◽  
Experimental Verification ◽  
Magnetization Curve ◽  
Magnetic Hysteresis ◽  
Uniaxial Anisotropy ◽  
Hysteresis Loops ◽  
Anisotropic Energy ◽  
Magnetic Hysteresis Loops ◽  
Anhysteretic Magnetization ◽  
Soft Ferrite

The anhysteretic magnetization curve is the key element of modeling magnetic hysteresis loops. Despite the fact that it is intensively exploited, known models of anhysteretic curve have not been verified experimentally. This paper presents the validation of four anhysteretic curve models considering four different materials, including isotropic, such as Mn-Zn soft ferrite, as well as anisotropic amorphous and nanocrystalline alloys. The presented results indicate that only the model that considers anisotropic energy is valid for a wide set of modern magnetic materials. The most suitable of the verified models is the anisotropic extension function-based model, which considers uniaxial anisotropy.

Applications of Transmission Electron Microscopy in the Characterization of Metal Machinability

1968 ◽  
Vol 26 ◽  
pp. 442-443 ◽  
Author(s):  
L.E. Murr ◽  
A.B. Draper
Keyword(s):  
Electron Microscopy ◽  
State Physics ◽  
Test Material ◽  
Milling Machine ◽  
Rotary Table ◽  
Solid State Physics ◽  
Materials Properties ◽  
Transmission Electron ◽  
Selection Of

The industrial characterization of the machinability of metals and alloys has always been a very arbitrarily defined property, subject to the selection of various reference or test materials; and the adoption of rather naive and misleading interpretations and standards. However, it seems reasonable to assume that with the present state of knowledge of materials properties, and the current theories of solid state physics, more basic guidelines for machinability characterization might be established on the basis of the residual machined microstructures. This approach was originally pursued by Draper; and our presentation here will simply reflect an exposition and extension of this research.The technique consists initially in the production of machined chips of a desired test material on a horizontal milling machine with the workpiece (specimen) mounted on a rotary table vice. A single cut of a specified depth is taken from the workpiece (0.25 in. wide) each at a new tool location.

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