vsgiuВестник Сибирского государственного индустриального университетаBulletin of the Siberian State Industrial University2304 - 44972307-1710Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет"10.57070/2304-4497-2026-2(56)-59-66vsgiu-952Research ArticleРаздел 2. Металлургия и материаловедениеSection 2. Metallurgy and Materials ScienceВЛИЯНИЕ ПАРАМЕТРОВ ТЕРМИЧЕСКОЙ ОБРАБОТКИ НА МЕХАНИЧЕСКИЕ СВОЙСТВА АМОРФНЫХ СПЛАВОВ НА ОСНОВЕ КОБАЛЬТАTHE INFLUENCE OF HEAT TREATMENT PARAMETERS ON THE MECHANICAL PROPERTIES OF COBALT-BASED AMORPHOUS ALLOYShttps://orcid.org/0000-0002-1876-7141ХозромИяд Мохаммед НассерHosromIyad M.

аспирант кафедры физики

Postgraduate student of the Department of Physics

khozrom.i@misis.ruhttps://orcid.org/0000-0002-6263-7993МорозоваТатьяна ВладимировнаMorozovaTatyana V.

доцент кафедры физики

Associate Professor of the Department of Physics

tatianamorozova@misis.ruhttps://orcid.org/0000-0001-8181-883XАндруховаОльга ВитальевнаAndrukhovaOlga V.

доцент кафедры физики

Associate Professor of the Department of Physics

Andrukhova.ov@misis.ruНациональный исследовательский технологический университет «МИСИС»National Research Technological University «MISIS»202630062026025966Copyright © Хозром И., Морозова Т., Андрухова О., 20262026Хозром И., Морозова Т., Андрухова О.Hosrom I., Morozova T., Andrukhova O.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.sibsiu.ru/jour/article/view/952

Исследовано влияние контролируемой термической обработки при температурах ниже начала кристаллизации на комплекс механических свойств аморфного сплава на основе кобальта. Объектом исследования являлась аморфная лента состава 83,7 % Co + 3,7 % Fe + 3,2 % Cr + 9,4 % Si, полученная методом быстрой закалки из расплава. Установлены закономерностий изменения прочностных и деформационных характеристик сплава в зависимости от температуры и времени выдержки отжига после закалки, а также выявлены температурные интервалы, в которых происходят наиболее существенные структурные перестройки. Термическую обработку проводили в воздушной среде при температурах 150 – 350 °C с выдержкой 15 – 60 мин. Показано, что термическая обработка оказывает выраженное влияние на характер деформационных кривых и соотношение прочности и пластичности. В интервале температур 200 – 250 °C наблюдается увеличение относительного удлинения и появление стадии пластического течения, что является, по-видимому, следствием релаксации внутренних напряжений, перераспределения свободного объема и формирования локально упорядоченных кластеров, препятствующих неустойчивому развитию полос сдвига. Повышение температуры отжига выше 250 °C и времени выдержки более 15 мин приводит к снижению пластичности, росту склонности к охрупчиванию и деградации механических свойств вследствие интенсивной структурной релаксации и уплотнения аморфной матрицы. Полученные результаты могут быть использованы для оптимизации механических свойств аморфных лент на основе кобальта.

The effect of controlled heat treatment at temperatures below the start of crystallization on the complex of mechanical properties of an amorphous cobalt-based alloy has been studied. The object of the study was an amorphous ribbon of the composition 83.7 % Co + 3.7 % Fe + 3.2 % Cr + 9.4 % Si, obtained by rapid quenching from a melt. The patterns of changes in the strength and deformation characteristics of the alloy depending on the temperature and exposure time of annealing after quenching have been established, and temperature ranges in which the most significant structural changes occur have been identified. The heat treatment was carried out in an air environment at temperatures of 150 – 350 °C with an exposure time of 15 – 60 min. It is shown that heat treatment has a pronounced effect on the nature of deformation curves and the ratio of strength and ductility. In the temperature range of 200-250 °C, there is an increase in relative elongation and the appearance of a stage of plastic flow, which is probably a consequence of relaxation of internal stresses, redistribution of free volume, and the formation of locally ordered clusters that prevent the unstable development of shear bands. An increase in the annealing temperature above 250 ° C and a holding time of more than 15 minutes leads to a decrease in plasticity, an increase in the tendency to embrittlement and degradation of mechanical properties due to intense structural relaxation and compaction of the amorphous matrix. The results obtained can be used to optimize the mechanical properties of cobalt-based amorphous tapes.

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The authors declare that there are no conflicts of interest present.