blackmetИзвестия высших учебных заведений. Черная МеталлургияIzvestiya. Ferrous Metallurgy0368-07972410-2091National University of Science and Technology "MISIS"10.17073/0368-0797-2022-8-539-547blackmet-2365Research ArticleПо материалам конференции «Металлургия – 2021»Based on the materials of the conference “Metallurgy – 2021”Структурные преобразования при отжиге холоднодеформированного высокоэнтропийного сплава Al0,3CoCrFeNiStructural transformations during annealing of cold-worked high-entropy alloy Al0.3CoCrFeNihttps://orcid.org/0000-0001-5021-0098ИвановИ. В.IvanovI. V.

Иван Владимирович Иванов, к.т.н., научный сотрудник научно-исследовательской лаборатории физико-химических технологий и функциональных материалов

Россия, 630073, Новосибирск, пр. Карла Маркса, 20

Ivan V. Ivanov, Cand. Sci. (Eng.), Research Associate of Research Laboratory of Physical and Chemical Technologies and Functional Materials

20 K. Marksa Ave., Novosibirsk 630073, Russian Federation

i.ivanov@corp.nstu.ruhttps://orcid.org/0000-0002-1114-6799ЭмурлаевК. И.EmurlaevK. I.

Кемал Исметович Эмурлаев, младший научный сотрудник науч­но-исследовательской лаборатории физико-химических технологий и функциональных материалов

Россия, 630073, Новосибирск, пр. Карла Маркса, 20

Kemal I. Emurlaev, Junior Researcher of Research Laboratory of Physical and Chemical Technologies and Functional Materials

20 K. Marksa Ave., Novosibirsk 630073, Russian Federation

emurlaev@corp.nstu.ruКуперК. Э.KuperK. E.

Константин Эдуардович Купер, к.ф.-м.н., старший научный сотрудник ЦКП «СКИФ»

Россия, 630090, Новосибирск, ул. Лаврентьева, 5

Konstantin E. Kuper, Cand. Sci. (Phys.-Math.), Senior Researcher of the Collective Use Centre “SKIF”

5 Lavrent’eva Str., Novosibirsk 630090, Russian Federation

k.e.kuper@inp.nsk.suhttps://orcid.org/0000-0002-2811-8292СафароваД. Э.SafarovaD. E.

Дарья Эйнуллаевна Сафарова, магистрант

Россия, 630073, Новосибирск, пр. Карла Маркса, 20

Dar’ya E. Safarova, MA Student

20 K. Marksa Ave., Novosibirsk 630073, Russian Federation

safarova10ab@mail.ruhttps://orcid.org/0000-0003-2871-0269БатаевИ. А.BataevI. A.

Иван Анатольевич Батаев, д.т.н., заведующий научно-исследовательской лаборатории физико-химических технологий и функциональных материалов

Россия, 630073, Новосибирск, пр. Карла Маркса, 20

Ivan A. Bataev, Dr. Sci. (Eng.), Head of the Research Laboratory of Physical and Chemical Technologies and Functional Materials

20 K. Marksa Ave., Novosibirsk 630073, Russian Federation

i.bataev@corp.nstu.ruНовосибирский государственный технический университетРоссияNovosibirsk State Technical UniversityRussian FederationИнститут катализа им. Г.К. Борескова СО РАНРоссияBoreskov Institute of Catalysis, Siberian Branch of the Russian Academy of SciencesRussian Federation202201092022658539547Copyright © Иванов И.В., Эмурлаев К.И., Купер К.Э., Сафарова Д.Э., Батаев И.А., 20222022Иванов И.В., Эмурлаев К.И., Купер К.Э., Сафарова Д.Э., Батаев И.А.Ivanov I.V., Emurlaev K.I., Kuper K.E., Safarova D.E., Bataev I.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://fermet.misis.ru/jour/article/view/2365

В работе рассматриваются особенности структурных преобразований при отжиге высокоэнтропийного сплава Al0,3CoCrFeNi. Полученные методом аргонодуговой плавки слитки были подвергнуты холодной прокатке со степенью обжатия 50 %. Заготовки отжигались в печи в течение 4 часов при температурах 200, 400, 600, 800 и 1000 °C. Полученные по описанной методике образцы исследовали с использованием методов дифракции синхротронного рентгеновского излучения в режиме на просвет и дифракции обратно рассеянных электронов. Результаты свидетельствуют о том, что вплоть до температуры 600 °C структура сплавов представлена одной фазой с гранецентрированной кубической решеткой. При отжиге сплавов при температурах 800 и 1000 °C фазовый состав характеризуется наличием двух фаз: разупорядоченной фазы с гранецентрированной кубической решеткой и упорядоченной фазой с примитивной кубической решеткой. При температурах выше 800 °C отжиг сплавов сопровождается развитием рекристаллизационных процессов. Было выявлено, что после отжига при 800 °C относительная доля микрообъемов, характеризующихся межугловой разориентировкой более 10°, составила 20 %, а после отжига при 1000 °C – 65 %. Микротвердость исследуемых образцов повышается при росте температуры до 600 °C и снижается при дальнейшем росте температуры. Анализ ширины дифракционных максимумов с использованием методов профильного анализа дифрактограмм свидетельствует о росте искажений кристаллической решетки разупорядоченной фазы. Подобное поведение может быть связано с выделением наноразмерных включений в матрице основной фазы.

The paper considers the features of structural transformations during annealing of the high-entropy alloy Al0.3CoCrFeNi. The ingots obtained by argon arc melting were subjected to cold rolling with a compression ratio of 50 %. The produced worpieces were annealed in the furnace for 4 hours at temperatures of 200, 400, 600, 800 and 1000 °C. The samples obtained by the described technique were examined using the methods of synchrotron X-ray diffraction in the lumen mode and diffraction of backscattered electrons. The research data indicate that up to a temperature of 600 °C, the structure of the alloys is represented by a single phase with a face-centered cubic lattice. When annealing alloys at temperatures of 800 and 1000 °C, the phase composition is characterized by the presence of two phases: a disordered phase with a face-centered cubic lattice and an ordered phase with a primitive cubic lattice. At temperatures above 800 °C, the burning of alloys is accompanied by development of recrystallization processes. It was found that after annealing at 800 °C, the relative proportion of micro-volumes characterized by inter-angular misorientation of more than 10° was 20 %, and after annealing at 1000 °C – 65 %. Microhardness of the studied samples increases with an increase in temperature up to 600 °C and decreases with a further increase in temperature. Analysis of the width of diffraction maxima using the methods of profile analysis of diffractograms indicates an increase in distortions of the crystal lattice of the ordered phase. This behavior may be associated with the release of nanoscale inclusions in the matrix of the main phase.

высокоэнтропийные сплавысплав Al03CoCrFeNiхолодная прокаткаотжигрекристаллизациямикротвердостьдифракция обратно рассеянных электроновдифракция синхротронного рентгеновского излученияhigh-entropy alloysAl0.3CoCrFeNicold rollingannealingrecrystallizationmicrohardnesselectron backscatter diffractionsynchrotron X-ray diffractionИсследование выполнено при финансовой поддержке Российского научного фонда № 20-73-10215 «In-situ исследование эволюции дислокационной структуры пластически деформированных высокоэнтропийных сплавов в условиях действия высоких давлений и температур с применением синхротронного излучения». Исследования выполнены на оборудовании ЦКП «Структура, механические и физические свойства материалов».The work was supported by the Russian Science Foundation within the research project No. 20-73-10215 “In-situ study of evolution of the dislocation structure of plastically deformed high-entropy alloys under high-pressures and temperatures using synchrotron radiation”. 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The authors declare that there are no conflicts of interest present.