Frontier Materials & TechnologiesFrontier Materials & TechnologiesFrontier Materials & Technologies2782-40392782-6074Togliatti State University94110.18323/2782-4039-2024-2-68-7ArticlesСтатьиResearch ArticleThe influence of Cu additions on the microstructure and properties of Al–Fe system alloys produced by casting into electromagnetic crystallizerВлияние добавок Cu на микроструктуру и свойства сплавов системы Al–Fe, полученных методом литья в электромагнитный кристаллизаторhttps://orcid.org/0000-0002-8616-0042MedvedevAndrey E.МедведевАндрей Евгеньевич
Russian Federation

PhD (Physics and Mathematics), junior researcher

кандидат физико-математических наук, младший научный сотрудник

medvedevae@uust.ruhttps://orcid.org/0000-0002-1879-9389ZhukovaOlga O.ЖуковаОльга Олеговна
Russian Federation

postgraduate student

аспирант

olga.zhukova96@mail.ruhttps://orcid.org/0000-0002-3340-3880ShaikhulovaAigul F.ШайхуловаАйгуль Фазировна
Russian Federation

PhD (Engineering), Associate Professor, senior researcher

кандидат технических наук, доцент, старший научный сотрудник

shaikhulova@inbox.ruhttps://orcid.org/0000-0001-9950-0336MurashkinMaxim Yu.МурашкинМаксим Юрьевич
Russian Federation

PhD (Engineering), senior researcher

кандидат технических наук, старший научный сотрудник

maksim.murashkin.70@yandex.ruUfa University of Science and TechnologyУфимский университет науки и технологий28062024277852806202428062024Copyright ©; 2024, Medvedev A.E., Zhukova O.O., Shaikhulova A.F., Murashkin M.Y.Copyright ©; 2024, Медведев А.Е., Жукова О.О., Шайхулова А.Ф., Мурашкин М.Ю.2024Medvedev A.E., Zhukova O.O., Shaikhulova A.F., Murashkin M.Y.Медведев А.Е., Жукова О.О., Шайхулова А.Ф., Мурашкин М.Ю.https://creativecommons.org/licenses/by/4.0https://vektornaukitech.ru/jour/article/view/941

The modern electrical engineering industry requires cheap and easily reproducible aluminum alloys with advanced mechanical strength and electrical conductivity. This work studies the influence of small (up to 0.3 wt. %) copper additions on the microstructure and physical and mechanical properties, as well as phase transformations in the Al–Fe system alloys with an iron content of 0.5 and 1.7 wt. %, produced by continuous casting into electromagnetic crystallizer. Alloys of the above chemical compositions were produced, and subsequently annealed at 450 °C for 2 h. In all states, the microstructure (via SEM), yield strength, ultimate tensile strength, elongation to failure, and electrical conductivity were studied. It has been shown that copper additions lead to an increase in the strength of both alloys and a slight decrease in their ductility compared to similar materials without copper. An increase in strength and a decrease in ductility due to the copper addition is associated with the formation of more dispersed intermetallic particles in copper-containing Al–Fe system alloys. Additional spheroidizing annealing leads to a decrease in the length of the interphase boundary between the aluminum matrix and iron aluminide particles due to a change in their morphology, which leads to an increase in electrical conductivity. In general, copper-containing alloys showed higher mechanical strength with lower electrical conductivity, as well as higher thermal stability.

Современная электротехническая промышленность требует дешевых и легко воспроизводимых алюминиевых сплавов – материалов с повышенной механической прочностью и электропроводностью. В работе исследовано влияние малых (до 0,3 мас. %) добавок меди на микроструктуру и физико-механические свойства, а также фазовые трансформации в сплавах системы Al–Fe с содержанием железа 0,5 и 1,7 мас. %, полученных методом непрерывного литья в электромагнитный кристаллизатор. Были получены сплавы указанных выше химических составов, впоследствии отожженные при 450 °С в течение 2 ч. Во всех состояниях были изучены микроструктура (с помощью РЭМ), предел текучести, предел прочности при растяжении, удлинение до разрушения и электропроводность. Показано, что добавки меди приводят к увеличению прочности обоих сплавов и некоторому снижению их пластичности по сравнению с аналогичными материалами без меди. Повышение прочности и снижение пластичности за счет добавки меди связано с образованием более дисперсных интерметаллидных частиц в медьсодержащих сплавах системы Al–Fe. Дополнительный сфероидизирующий отжиг приводит к уменьшению протяженности межфазной границы между алюминиевой матрицей и частицами алюминида железа за счет изменения их морфологии, что ведет к увеличению электропроводности. В целом медьсодержащие сплавы показали более высокую механическую прочность при меньшей электропроводности, а также повышенную термическую стабильность.

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