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20 results on '"Landgraf, F. J. G."'

3. Modeling of sharp change in magnetic hysteresis behavior of electrical steel at small plastic deformation.

Author

Sablik, M. J., Rios, S., Landgraf, F. J. G., Yonamine, T., and de Campos, M. F.

Abstract

In 2.2% Si electrical steel, the magnetic hysteresis behavior is sharply sheared by a rather small plastic deformation (0.5%). A modification to the Jiles-Atherton hysteresis model makes it possible to model magnetic effects of plastic deformation. In this paper, with this model, it is shown how a narrow hysteresis with an almost steplike hysteresis curve for an undeformed specimen is sharply sheared by plastic deformation. Computed coercivity and hysteresis loss show a sharp step to higher values at small strain due to an n=1/2 power law dependence on residual strain. The step is seen experimentally. [ABSTRACT FROM AUTHOR]

Published
2005
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4. Binary Fe–Nd metastable phases in the solidification of Fe–Nd–B alloys.

Author

Landgraf, F. J. G., Missell, F. P., Knoch, G., Grieb, B., and Henig, E.-T.

Subjects
*IRON alloys, *BINARY metallic systems, *ALLOYS, *IRON-neodymium-boron alloys
Abstract

Presents information on a study which investigated the formation of binary metastable phases upon the solidification of ternary iron-neodymium-boron alloys. Coercivity of iron-neodymium-boron magnets; Methodology of the study; Results and discussion.

Published
1991
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5. Magnetic and structural characterization of Nd5Fe17.

Author

Landgraf, F. J. G., Missell, F. P., Rechenberg, H. R., Schneider, G., Villas-Boas, V., Moreau, J. M., Paccard, L., and Nozières, J. P.

Subjects
*NEODYMIUM, *IRON, *MAGNETS, *MAGNETISM
Abstract

Presents information on a study which determined the magnetic and structural characterization of neodymium iron magnets. Description of neodymium iron magnets; Methodology of the study; Results and discussion.

Published
1991
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18. Chemical composition and coercivity of SmCo5 magnets

Author

de Campos, M. F., primary, Landgraf, F. J. G., additional, Saito, N. H., additional, Romero, S. A., additional, Neiva, A. C., additional, Missell, F. P., additional, de Morais, E., additional, Gama, S., additional, Obrucheva, E. V., additional, and Jalnin, B. V., additional

Published
1998
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