DocumentCode :
1100376
Title :
Modeling plastic deformation effects in steel on hysteresis loops with the same maximum flux density
Author :
Sablik, Martin J. ; Yonamine, Taeko ; Landgraf, Fernando J G
Author_Institution :
Southwest Res. Inst., San Antonio, TX, USA
Volume :
40
Issue :
5
fYear :
2004
Firstpage :
3219
Lastpage :
3226
Abstract :
Plastic deformation affects the hysteretic magnetic properties of steels because it changes the dislocation density, which affects domain-wall movement and pinning, and also because it places the specimen under residual strain. An earlier paper proposed a model for computing hysteresis loops on the basis of the effect of grain size d and dislocation density ζd. In that paper, hysteresis loops were compared that all had the same maximum flux density Bmax. The result was that coercivity Hc exhibited a linear relationship with inverse grain size (1/d) and ζd12/. The same was true of hysteresis loss WH. If one compared hysteresis loops all with the same Hmax, these linear dependences were only approximately found. Because the relationships are simpler for loops of constant Bmax, core loss experimenters compare loops that all have the same Bmax. In this paper, we modify the model to study the effect of plastic tensile deformation on hysteresis loops with the same Bmax. We found linear relationships between Hc and residual plastic strain εr and between WH and εr. With increasing residual tensile strain, Hc increases (whereas with increasing elastic tensile strain, Hc decreases). Also, with increasing residual tensile strain, the slope of the hysteresis loop decreases (whereas with increasing elastic tensile strain, the slope increases). We also consider the effect of compressive plastic deformation.
Keywords :
coercive force; dislocation density; grain size; magnetic flux; magnetic hysteresis; magnetic materials; nanostructured materials; plastic deformation; steel; tensile testing; coercivity; compressive plastic deformation; dislocation density; domain-wall movement; domain-wall pinning; elastic tensile strain; grain size effect; hysteresis loops; hysteresis loss; hysteretic magnetic steel properties; magnetic materials; maximum flux density; microstructural effects; plastic deformation modeling; plastic tensile deformation; residual plastic strain; residual strain; residual tensile strain; Coercive force; Core loss; Deformable models; Grain size; Magnetic field induced strain; Magnetic hysteresis; Magnetic properties; Plastics; Steel; Tensile strain; Hysteresis modeling; magnetic materials; microstructural effects; plastic deformation;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2004.832763
Filename :
1333130
Link To Document :
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