scholarly journals Texture and Magnetic Properties

1981 ◽  
Vol 4 (3) ◽  
pp. 129-141 ◽  
Author(s):  
P. R. Morris ◽  
J. W. Flowers
Keyword(s):  
Experimental Data ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Property Values ◽  
Core Loss ◽  
Theoretical Development ◽  
Silicon Iron ◽  
Independent Components ◽  
Cubic Materials ◽  
Fourth Order Equations

Expressions are derived for the dependence of the magnetic properties of cubic materials on texture. The theoretical development generally parallels that of Bunge, but employs Roe's formalism. The expressions, together with limited experimental data, enable one to express magnetic property variations in the plane of the sheet, to obtain property values for comparable texture-free specimens, and to separate magnetic properties into texture-dependent and texture-independent components. Core loss, magnetic permeability and torque or specimens of "nonoriented" nominal 3% silicon-iron are fitted to simple fourth-order equations.

Improved Magnetic Properties of Silicon-Iron Alloy Powder Core

2007 ◽  
Vol 534-536 ◽  
pp. 1321-1324 ◽  
Author(s):  
Tae Kyung Lee ◽  
Gu Hyun Kim ◽  
Gwang Bo Choi ◽  
In Bum Jeong ◽  
Kwang Youn Kim ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Core Loss ◽  
Low Frequency ◽  
Iron Alloy ◽  
Size Control ◽  
Soft Magnetic Materials ◽  
Silicon Iron ◽  
Magnetic Components ◽  
Si Content ◽  
Size Adjustment

Eventhough Fe-6.5 wt.% Si alloy shows excellent magnetic properties, magnetic components made of the alloy with the composition are not totally commercialized because of its extremely low ductility. In order to overcome this demerit of alloy, 6.7 wt.% Si alloy powders were produced by gas atomization and then post-processed to form magnetic cores. By doing so, the total core loss could be minimized by reducing both hysteresis and eddy current loss, which were attributed to both grain size adjustment and particle size control. From our experiments, we were able to achive a core loss of 390 mW/cm3 at an induction of 0.1 T and 50 kHz through proper processes and a permeability μeff of 68 at low frequency was kept up to 700 kHz. These properties are compatable with the properties of well-known soft magnetic materials such as Fe-Si-Al and Ni- Fe alloys. From the above results, it can be concluded that Fe-Si alloy powders with high Si content have very high potential for the commercialization and application of the core.

Metallography Parameters Study of Fe-6.5wtSi Alloy Obtained by Spray Forming

2008 ◽  
Vol 591-593 ◽  
pp. 315-321
Author(s):  
F.L. Rodrigues ◽  
M.A. Soares ◽  
Maria do Carmo Silva ◽  
Claudemiro Bolfarini ◽  
M.D.C. Sobral
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Silicon Content ◽  
Room Temperature ◽  
Core Loss ◽  
Polarized Light ◽  
Spray Forming ◽  
Dark Field ◽  
Bright Field ◽  
Silicon Iron

Silicon-iron alloys with silicon content about 6.5wt.%Si offer a great potential for applications aiming reduction of core loss in electric parts. Deposits of the Fe-6.5wt%Si alloy produced by spray forming were annealed at temperatures between 400 and 1300oC, during 1h in vacuum. The grain size has a great importance to the magnetic properties. In the present work, it was analyzed the influence of the metallography parameters in order to get the best accuracy to determine the grain size according to ASTM 112-96. Chemical composition, time and temperature of specific etchings were modified and tested in different conditions of observation in light microscopy. Bright field, polarized light and dark field were used in the samples aiming to measure the grain size. The best etchings were Nital 10% and Marshall, both at room temperature. The results of grain measurement are presented in their relationship with the magnetic properties.

ARMCO DI-MAX NONORIENTED ELECTRICAL STEELS

Alloy Digest ◽  
1999 ◽  
Vol 48 (1) ◽  
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Tensile Properties ◽  
Core Loss ◽  
Electrical Steels

Abstract Armco DI-MAX nonoriented electrical steels have practically identical magnetic properties in any direction of magnetism in the plane of the material. They have superior permeability at high inductions, low average core loss, good gage uniformity, excellent flatness, and a high stacking factor. This datasheet provides information on composition, physical properties, hardness, and tensile properties. Filing Code: FE-88. Producer or source: Armco Inc., Specialty Steels Division. Originally published April 1989, revised January 1999.

scholarly journals Cold-Rolling and Magnetic Properties of 6.5% Silicon-Iron Alloys

1966 ◽  
Vol 30 (6) ◽  
pp. 552-558 ◽  
Author(s):  
Tetsuro Ishizaka ◽  
Keizo Yamabe ◽  
Toshio Takahashi
Keyword(s):  
Magnetic Properties ◽  
Cold Rolling ◽  
Iron Alloys ◽  
Silicon Iron

Stress Optical Behavior of Rubber Networks at Large Deformations

1966 ◽  
Vol 39 (5) ◽  
pp. 1436-1450
Author(s):  
K. J. Smith ◽  
D. Puett
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Statistical Theory ◽  
Natural Rubber ◽  
Large Deformations ◽  
Strong Support ◽  
Theoretical Development ◽  
Statistical Parameters ◽  
Strain Behavior ◽  
Optical Behavior

Abstract The birefringence of natural rubber networks at large deformations has been investigated experimentally and compared with the simultaneously determined stress—strain behavior. Our data is analyzed using a statistical theory of flexibly jointed chains, derived herein, which is believed to be more significant for the particular range of deformation used than the theories of Treloar and of Kuhn and Grün. In addition, the experimental data of Saunders is commented on in light of our theoretical development. We find that for network extensions exceeding those of the Gaussian region there is little correlation between the observed and theoretical behavior of the stress and birefringence (based upon the theory of flexibly jointed chains) and this lack of agreement is attributed to the fact that the statistical parameters needed for the description of the optical chain properties differ in magnitude from those required for the mechanical properties. Furthermore, by considering the points of incipient crystallization the strain behavior of the stress-optical coefficient is highly indicative of nonGaussian behavior rather than crystallization, and therefore yields strong support for the position that nonGaussian behavior does exist in rubber networks.

WANG–LANDAU SIMULATION ON THERMODYNAMIC AND MAGNETIC PROPERTIES OF HONEYCOMB LATTICE

2011 ◽  
Vol 25 (26) ◽  
pp. 3435-3442
Author(s):  
XIAOYAN YAO
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Magnetic Properties ◽  
Free Energy ◽  
Magnetic Susceptibility ◽  
Magnetic Property ◽  
Ground State ◽  
Antiferromagnetic Order ◽  
Honeycomb Lattice ◽  
Antiferromagnetic Ising Model

Wang–Landau algorithm of Monte Carlo simulation is performed to understand the thermodynamic and magnetic properties of antiferromagnetic Ising model on honeycomb lattice. The internal energy, specific heat, free energy and entropy are calculated to present the thermodynamic behavior. For magnetic property, the magnetization and magnetic susceptibility are discussed at different temperature upon different magnetic field. The antiferromagnetic order is confirmed to be the ground state of the system, and it can be destroyed by a large magnetic field.

The Research of Non-Oriented Electrical Steel Processed by Stress Relief Annealing Experiments

2014 ◽  
Vol 887-888 ◽  
pp. 252-256
Author(s):  
Zhun Li ◽  
Jing Liu ◽  
Shi De Li ◽  
Ze Lin Zheng
Keyword(s):  
Magnetic Properties ◽  
Electrical Steel ◽  
Core Loss ◽  
Reference Method ◽  
Stress Relief ◽  
Hydrogen Atmosphere ◽  
Silicon Steel ◽  
Pure Hydrogen ◽  
Final Annealing ◽  
Annealing Experiments

A high grade non-oriented electrical steel final annealing product was processed by stress relief annealing experiments under pure hydrogen atmosphere using different process parameters. The samples were compared in the aspects of magnetic properties and anisotropy, then analyzed the phenomena concerned with grain size, texture and precipitates aspects. The experiments showed that the samples magnetic properties were most improved in the 850 degrees stress relief annealing experiment, thus providing a reference method for non-oriented silicon steel stress relief annealing experiments and to obtain low core loss non-oriented silicon steel.

Comparison between Magnetic Anisotropy Energy and a Parameter to the Assessment of Magnetic Property of Electrical Steel

2018 ◽  
Vol 930 ◽  
pp. 449-453
Author(s):  
R.A.C. Felix ◽  
R.L.O. da Rosa ◽  
Luiz P. Brandão
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
Magnetic Anisotropy ◽  
Electrical Steel ◽  
Anisotropy Energy ◽  
Alternative Methods ◽  
Magnetic Polarization ◽  
Magnetic Anisotropy Energy ◽  
Electrical Steels ◽  
Global Parameters

Alternative methods of quantitative texture analysis are applied to characterize the non-oriented grain electrical steels (NOG) in relation to their magnetic properties. Magnetic anisotropy energy (Ea) and A parameter are two models based on crystallographic texture that generates global parameters that can be used to predict the magnetic properties of NOG steels. In this work, these two models were used to evaluate the magnetic polarization and compared between themselves to realize which one best correlates to this property.

Influence Analysis of the Magnetic Properties of the Materials on the Magnetic Powder Clutch Characteristics

2012 ◽  
Vol 590 ◽  
pp. 111-115
Author(s):  
Cheng Wang ◽  
Shan Zhen Xu
Keyword(s):  
Finite Element ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Magnetic Circuit ◽  
Magnetic Powder ◽  
Analysis Model ◽  
Torque Transmission ◽  
Depth Analysis ◽  
Numerical Calculation Method ◽  
Main Factor

The torque transmission capacity within a range of the structure is the main factor that limit the application of the magnetic powder clutch in the vehicle transmission field. In order to increase the torque transmitting characteristics of the magnetic powder clutch, the analysis model of the magnetic powder clutch was established with finite element numerical calculation method based on the depth analysis its operating principle, which focused on the study of the influence of the magnetic property of the magnetic powder and magnetic circuit material on the magnetic powder clutch performance. The research results showed that the greater of the saturated magnetic induction and the magnetic permeability of the magnetic powder and magnetic circuit material are, the better of the torque transmitting characteristics of the magnetic powder clutch is.

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