Rodionov Dmitriy Petrovich, Doctor of physical and mathematical sciences, chief research scientist, Institute of physics of metals of the Ural branch of the Russian Academy of Sciences (18 S. Kovalevskoy street,
Ekaterinburg, Russia), phym@ imp.uran.ru
Khlebnikova Yuliya Valentinovna, Candidate of engineering sciences, senior staff scientist, Institute of physics of metals of the Ural branch of the Russian Academy of Sciences (18 S. Kovalevskoy street, Ekaterinburg, Russia), yulia_kh@ imp.uran.ru
Kozlov Gennadiy Vasil'evich, Doctor of engineering sciences, professor, dean of the Faculty of advanced studies and additional education, Penza Stat University (40 Krasnaya street, Penza, Russia), gvk17@ yandex.ru
Gervas'eva Irina Vladimirovna, Doctor of physical and mathematical sciences, leading researcher, Institute of physics of metals of the Ural branch of the Russian Academy of Sciences (18 S. Kovalevskoy street, Ekaterinburg, Russia), email@example.com
Suaridze Teona Romanievna, Junior researcher, Institute of physics of metals of the Ural branch of the Russian Academy of Sciences (18 S. Kovalevskoy street, Ekaterinburg, Russia), firstname.lastname@example.org
Background. Possibility of successful realization in Fe-Ni alloys with fcc lattice of a very pointed cubic texture, tending to a monocrystal one, their quite high mechanical properties, ability to take inoculating oriented oxide layers CeO2 or Y2O3, perfect annealing texture allow using a metal back of Ni-Fe alloys not only in technology of high-temperature superconductors (HTSC) of second generation, but also for other multilayer compositions, for example, in electronic engineering. The article is aimed at researching the regularities of formation of primary recrystallization textures in alloys Fe64Ni36 и Fe50Ni50 depending on the annealing conditions.
Materials and methods. For melting the laboratory alloys Fe64Ni36 and Fe50Ni50 the researchers used nickel of 99,99 % purity and carbonyl iron of 99,97 % purity. To assess the perfection of cubic texture in the metal tape and to research the orientation of recrystallized grains in the plance of textured tape-backing the authors used the method of back-scattered electron diffraction on scanning electronic microscopes Pegasus «Quanta-200» and Jeol JSM 840A. Recrystallization kinetics of deformed tapes was researched on the dilatometer Ulvac Sincu-riku. To research the microstructure the authors used the optical microscope «Neophot-30».
Results. The research results prove the possibility of realization of alloys Fe64Ni36 and Fe50Ni50 with pointed cubic texture of recrystallization, tending to a monocrystal one.
1. Alloying of nickel with iron leads to a significant increase of the alloy lattice parameter, however, unlike alloying with other d-transition metals, it leads to no changes of the alloy deformation texture type, and this by-turn allows obtaining the pointed cubic texture in the whole area of fcc Fe-Ni alloys existence during annealing.
2. For the alloy Fe50Ni50 the authors determined an optimal mode of recrystallization of annealing at 1050 °С for 1 hour, during which it is possible to realize a very pointed cubic texture, tending to a monocrystal one with presence of twin grains on the surface of the textured tape of less than 1 %.
3. In the invar Fe64Ni36 after all modes of recrystallizing annealing the realized pointed cubic texture allows using thin tapes from the said alloy as the backing in technology of HTSC of second generation, but lags a little behind in the level of Fe50Ni50 permalloy texture perfection.
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