Kinetics of changes in the saturation magnetization during annealings of the Fe-36% Ni invar alloy subjected to severe plastic deformation

Changes in the saturation magnetization and microhardness of the Fe-36% Ni invar alloy with a nanocrystalline structure, which were caused by annealings at different temperatures, are studied. The nanocrystalline structure was produced by severe plastic deformation. A high-temperature ferromagnetic...

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Bibliographic Details
Published in:Physics of metals and metallography 2010-03, Vol.109 (3), p.234-237
Main Authors: Mulyukov, R. R., Sharipov, I. Z., Bukreeva, K. A., Bitkulov, I. Kh
Format: Article
Language:English
Subjects:
Annealing
Chemistry and Materials Science
Diffusion
Electrical and Magnetic Properties
Ferromagnetism
Ferrous alloys
Hardness
Heat resistant alloys
Iron alloys
Low expansion alloys
Magnetization
Materials Science
Metallic Materials
Nanocrystals
Nickel base alloys
Plastic deformation
Saturation (magnetic)
Specialty metals industry
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Summary:Changes in the saturation magnetization and microhardness of the Fe-36% Ni invar alloy with a nanocrystalline structure, which were caused by annealings at different temperatures, are studied. The nanocrystalline structure was produced by severe plastic deformation. A high-temperature ferromagnetic phase was found to result from the formation of such a structure. The temperature of annealing after which the content of the phase is maximum was determined. When analyzing the kinetics of phase-composition changes, an increase in the diffusive mobility of atoms during the formation of the nanocrystalline state in the material was taken into account.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X1003004X