EVOLUTION OF THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF MELT SPUN FE2NIAL ALLOY DURING AGING

1 Menushenkov Vladimir
Co-authors:
1 Gorshenkov Mikhail 1 Shchetinin Igor 1 Savchenko Elena
Institution:
1 National University of Science and Technology “MISiS”, Moscow, Russian Federation, menushenkov@gmail.com
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
1346-1351
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
130 views / 29 downloads
Abstract

A microcrystalline Alni alloy with the nominal composition Fe51.1Ni23.5Al23.7Si1.7 was prepared by melt-spinning. Detailed studies of the spinodal decomposition (SD), microstructure and magnetic properties of the ribbons subjected to isothermal aging at Tag = 500-780 °C are reported. TEM investigations of the decomposition of the solid solution (β2 → β + β2) after melt-spinning and aging have revealed several types of decomposition products. As prepared melt spun ribbons show zone structure and antiphase domain (APD) boundaries inside grains. Aging at 500-600 °C led to the coarsening of the zone microstructure and to the appearance of discontinuous precipitates (DP) (β + β2 → β' + β'2) at grain boundaries. Aging at higher than 650 °C causes the formation of a modulated microstructure instead of a zone microstructure inside grains and coarsening of DP products. As prepared ribbons reveal soft magnetic properties (Hc = 480 Am-1). The maximum coercivity Hc = 20 kAm-1 was obtained for the ribbons aged at 700 °C. MFM method was used to image the magnetic microstructure of melt spun Alni ribbons subjected to aging.

Keywords: Alni alloy, melt-spinning, aging, antiphase domains, discontinuous precipitates

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