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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nuc</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НЯЦ РК</journal-title><trans-title-group xml:lang="en"><trans-title>NNC RK Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7516</issn><issn pub-type="epub">1729-7885</issn><publisher><publisher-name>Национальный ядерный центр Республики Казахстан</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52676/1729-7885-2021-4-37-44</article-id><article-id custom-type="elpub" pub-id-type="custom">nuc-405</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>РАДИАЦИОННАЯ ПОВРЕЖДАЕМОСТЬ БЕРИЛЛИЯ ПРИ НИЗКОТЕМПЕРАТУРНОМ НЕЙТРОННОМ ОБЛУЧЕНИИ</article-title><trans-title-group xml:lang="en"><trans-title>RADIATION DAMAGE TO BERYLLIUM UNDER LOW-TEMPERATURE NEUTRON IRADIATION</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Оразгалиев</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Orazgaliyev</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курчатов</p><p>Усть-Каменогорск</p></bio><bio xml:lang="en"><p>Kurchatov</p><p>Ust-Kamenogorsk</p></bio><email xlink:type="simple">orazgaliev@nnc.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сапатаев</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Sapatayev</surname><given-names>Ye. Ye.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кожахметов</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozhakhmetov</surname><given-names>Ye. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Даулетханов</surname><given-names>Е. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Dauletkhanov</surname><given-names>Ye. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курчатов</p></bio><bio xml:lang="en"><p>Kurchatov</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уазырханова</surname><given-names>Г. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Uazyrkhanova</surname><given-names>G. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Усть-Каменогорск</p></bio><bio xml:lang="en"><p>Ust-Kamenogorsk</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Филиал «Институт атомной энергии» РГП НЯЦ РК; Восточно-Казахстанский технический университет им. Д. Серикбаева<country>Казахстан</country></aff><aff xml:lang="en">Branch “Institute of Atomic Energy” RSE NNC RK; D. Serikbayev East Kazakhstan state technical university<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Филиал «Институт атомной энергии» РГП НЯЦ РК<country>Казахстан</country></aff><aff xml:lang="en">Branch “Institute of Atomic Energy” RSE NNC RK<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Восточно-Казахстанский технический университет им. Д. Серикбаева<country>Казахстан</country></aff><aff xml:lang="en">D. Serikbayev East Kazakhstan state technical university<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>01</day><month>02</month><year>2022</year></pub-date><volume>0</volume><issue>4</issue><fpage>37</fpage><lpage>44</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Оразгалиев Н.А., Сапатаев Е.Е., Кожахметов Е.А., Даулетханов Е.Д., Уазырханова Г.К., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Оразгалиев Н.А., Сапатаев Е.Е., Кожахметов Е.А., Даулетханов Е.Д., Уазырханова Г.К.</copyright-holder><copyright-holder xml:lang="en">Orazgaliyev N.A., Sapatayev Y.Y., Kozhakhmetov Y.A., Dauletkhanov Y.D., Uazyrkhanova G.K.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://journals.nnc.kz/jour/article/view/405">https://journals.nnc.kz/jour/article/view/405</self-uri><abstract><p>В данной работе по оценке радиационного повреждения бериллия при низкотемпературном нейтронном облучении были исследованы образцы-свидетели из бериллия марки ТШГ-200 с содержанием оксидной фазы около 1% (масс), долговременно находящиеся в исследовательском реактора ИВГ.1М и облученные до флюенсов 0,8-4·1020 нейт./см2. Также для сравнения полученных результатов были испытаны необлученные исходные образцы свидетели той же марки.Целью исследований являлось установление уровня радиационной деградации образцов-свидетелей за время нахождения их в реакторе ИВГ.1М. Были проведены механические испытания на трехточечный изгиб и растяжение для определения прочностных характеристик образцов бериллия, а также была измерена их микротвердость. Для установления уровня распухания была определена плотность образцов бериллия методом гидростатического взвешивания в среде дистилированной воды.По результатам кратковременных испытаний на изгиб и растяжение, установлено, что материал бериллия после реакторного облучения разупрочняется в пределах 9,3–16,7%. А результаты измерения микротвердости показали возрастание до 23%. Результаты определения плотности не выявили распухание образцов после низкотемпературного нейтронного облучения.После механических испытаний были проведены фрактографический анализ изломов и микроструктурный анализ, которые не выявили заметных изменений в микроструктуре бериллия после облучения.</p></abstract><trans-abstract xml:lang="en"><p>In this work, to assess the radiation damage of beryllium under low-temperature neutron irradiation, samples from beryllium grade TShG-200 with an oxide phase concentration of about 1 wt % were studied, which were kept in the IVG.1M research reactor for a long time and were irradiated to fluences 0.8–4·1020 neut./cm2. Also, unirradiated original witness samples of the same brand were tested to compare the results.The aim was to establish the level of radiation degradation of beryllium samples during their tests in the IVG.1M reactor. Mechanical tests for three-point bending and tension were performed to determine the strength of beryllium samples, and their microhardness was also measured. To determine the degree of swelling of the beryllium samples their densities were measured by the method of hydrostatic weighing in the medium of distilled water.According to the results of short-term bending and tensile tests, it was found that the beryllium material after reactor irradiation softens in the range of 9.3–16.7%. And the results of measuring the microhardness showed an increase of up to 23%. Density results did not reveal swelling of the samples after low-temperature neutron irradiation.After mechanical tests, special studies of fractures and microstructural analysis were carried out, which did not reveal noticeable changes in the microstructure of beryllium after irradiation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>бериллий</kwd><kwd>нейтронное облучение</kwd><kwd>механические свойства</kwd><kwd>предел прочности</kwd><kwd>разупрочнение</kwd><kwd>микротвердость</kwd><kwd>распухание</kwd><kwd>микроструктура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>beryllium</kwd><kwd>neutron irradiation</kwd><kwd>mechanical properties</kwd><kwd>tensile strength</kwd><kwd>softening</kwd><kwd>microhardness</kwd><kwd>swelling</kwd><kwd>microstructure</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Серняев Г. А. 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