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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">556</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2022-3-1-69-75</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">The influence of aging on microhardness and electrical conductivity of Cu–2 wt. % Be alloy</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние старения на микротвердость и электропроводность сплава Cu–2 вес. % Be</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6116-1535</contrib-id><name-alternatives><name xml:lang="en"><surname>Zaynullina</surname><given-names>Liliya I.</given-names></name><name xml:lang="ru"><surname>Зайнуллина</surname><given-names>Лилия Ильгизовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>senior lecturer of Chair of Materials Science and Physics of Metals</p></bio><bio xml:lang="ru"><p>старший преподаватель кафедры материаловедения и физики металлов</p></bio><email>ZaynullinaLI@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0357-8161</contrib-id><name-alternatives><name xml:lang="en"><surname>Sarkeeva</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Саркеева</surname><given-names>Елена Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>senior lecturer of Chair of Materials Science and Physics of Metals</p></bio><bio xml:lang="ru"><p>старший преподаватель кафедры материаловедения и физики металлов</p></bio><email>Sarkeeva.e@inbox.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4789-4713</contrib-id><name-alternatives><name xml:lang="en"><surname>Alexandrov</surname><given-names>Igor V.</given-names></name><name xml:lang="ru"><surname>Александров</surname><given-names>Игорь Васильевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Physics and Mathematics), Professor, professor of Chair of Materials Science and Physics of Metals</p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, профессор, профессор кафедры материаловедения и физики металлов</p></bio><email>igorvalexandrov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4340-4067</contrib-id><name-alternatives><name xml:lang="en"><surname>Valiev</surname><given-names>Ruslan Z.</given-names></name><name xml:lang="ru"><surname>Валиев</surname><given-names>Руслан Зуфарович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Physics and Mathematics), Professor, professor of Chair of Materials Science and Physics of Metals</p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, профессор, профессор кафедры материаловедения и физики металлов</p></bio><email>valiev.rz@ugatu.su</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ufa State Aviation Technical University, Ufa</institution></aff><aff><institution xml:lang="ru">Уфимский государственный авиационный технический университет, Уфа</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2022</year></pub-date><issue>3-1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>69</fpage><lpage>75</lpage><history><date date-type="received" iso-8601-date="2022-09-30"><day>30</day><month>09</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/556">https://vektornaukitech.ru/jour/article/view/556</self-uri><abstract xml:lang="en"><p>Goods made of beryllium bronzes got widespread use in the industry due to the complex of properties: high heat conductivity, strength, hardness, wear resistance, and corrosion resistance. They are not magnesium-based and do not spark on impact; therefore, they are essential for the production of non-sparking tools. The alloys of this system are used in the electrical engineering industry; consequently, it is necessary to pay attention to the improvement of the material’s electrical conductivity. The paper studies the microstructure, microhardness, and electrical conductivity of the Cu–2 wt.% Be alloy exposed to high-pressure torsion (HPT). The authors investigated the microstructure and fine structure of the alloy in various states. The study showed that HPT leads to the formation of an ultrafine-grained nanostructured (UFG NS) state with an average size of grains/subgrains of 22±1 mmn. Additional ageing of samples after HPD led to a slight increase in the grains/subgrains size up to 31±1 mmn. In both states, the authors observed nanosized deformation twins. The authors studied the dependences of microhardness and electrical conductivity of the alloy after HPD on the time of further ageing. The study identified that the microhardness increases from 122±3 HV in the initial state up to 525±8 HV after HPD and ageing. The investigation shows that the electrical conductivity substantially better recovers after ageing of the UFG NS state compared to the initial state. The electrical conductivity of the UFG NS state increased from 14.5±0.1 % IACS up to 27.5±0.6 % IACS in conditions similar to the initial state ageing. Therefore, resulting from such processing, the Cu–2 wt.% Be alloy is characterized by its advanced strength properties and electrical conductivity.</p></abstract><trans-abstract xml:lang="ru"><p>Изделия из бериллиевых бронз получили широкое распространение в промышленности благодаря уникальному комплексу свойств: высокой теплопроводности, прочности, твердости, износостойкости, коррозионной стойкости. Они не магнитные и не дают искры при ударе, поэтому незаменимы для изготовления искробезопасных инструментов. Сплавы данной системы применяются в электротехнической промышленности, следовательно, стоит уделять внимание повышению электропроводности материалов. Работа посвящена исследованию микроструктуры, микротвердости и электропроводности сплава Cu‒2 вес. % Be, подвергнутого интенсивной пластической деформации кручением (ИПДК). Проведены исследования микроструктуры и тонкой структуры сплава в различных состояниях. Показано, что ИПДК приводит к формированию ультрамелкозернистого наноструктурного (УМЗ НС) состояния со средним размером зерен/субзерен 22±1 нм. Дальнейшее старение образцов после ИПДК привело к незначительному увеличению размера зерен/субзерен до 31±1 нм. В обоих состояниях прослеживаются наноразмерные деформационные двойники. Проведены исследования зависимости микротвердости и электропроводности сплава после ИПДК от времени последующего старения. Установлено, что микротвердость возрастает с 122±3 HV в исходном состоянии до 525±8 HV после ИПДК и старения. Показано, что электропроводность значительно лучше восстанавливается после проведения старения УМЗ НС состояния по сравнению с исходным состоянием. Электропроводность УМЗ НС состояния возросла с 14,5±0,1 % IACS до значения 27,5±0,6 % IACS при условиях, аналогичных случаю старения исходного состояния. Таким образом, в результате данных обработок сплав Cu–2 вес. % Be характеризуется повышенными прочностными свойствами и электропроводностью. </p></trans-abstract><kwd-group xml:lang="en"><kwd>HPT</kwd><kwd>beryllium bronze</kwd><kwd>electrical conductivity</kwd><kwd>nanostructure</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ИПДК</kwd><kwd>бериллиевая бронза</kwd><kwd>электропроводность</kwd><kwd>наноструктура</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was carried out under the financial support of the Ministry of Science and Higher Education of the Russian Federation within the project No. 0838-2020-0006 “Fundamental research of new principles of creation of the advanced electromechanical energy converters with the characteristics higher than the international standards with the improved efficiency and minimum specific indicators with the use of new high-performance electrotechnical materials”.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Министерства науки и высшего образования РФ в рамках проекта № 0838-2020-0006 «Фундаментальные исследование новых принципов создания перспективных электромеханических преобразователей энергии с характеристиками выше мирового уровня, с повышенной эффективностью и минимальными удельными показателями, с использованием новых высокоэффективных электротехнических материалов».</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Montecinos S., Tognana S., Gonzalez C., Salgueiro W. 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