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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">mateltech</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Материалы электронной техники</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1609-3577</issn><issn pub-type="epub">2413-6387</issn><publisher><publisher-name>MISIS</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/1609-3577-2017-1-22-31</article-id><article-id custom-type="elpub" pub-id-type="custom">mateltech-242</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>Материаловедение и технология. Полупроводники</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIALS SCIENCE AND TECHNOLOGY. SEMICONDUCTORS</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ ПРОЦЕССА ПЛАСТИЧЕСКОГО ФОРМОВАНИЯ ПРИ ПОЛУЧЕНИИ ТЕРМОЭЛЕКТРИЧЕСКОГО МАТЕРИАЛА НА ОСНОВЕ ТЕЛЛУРИДА ВИСМУТА</article-title><trans-title-group xml:lang="en"><trans-title>STUDY OF PLASTIC FORMING IN PRODUCTION OF THERMOELECTRIC BISMUTH TELLURIDE BASED MATERIAL</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>Богомолов</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Bogomolov</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Богомолов Денис Игоревич — канд. техн. наук, ассистент.</p><p> </p></bio><bio xml:lang="en"><p>Denis I. Bogomolov: Cand. Sci. (Eng.), Assistant.</p><p> </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бублик</surname><given-names>В. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Bublik</surname><given-names>V. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Бублик Владимир Тимофеевич — доктор физ.−мат. наук, профессор.</p><p> </p></bio><bio xml:lang="en"><p>Vladimir T. Bublik: Dr. Sci. (Phys.−Math.), Professor.</p><p> </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Верезуб</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Verezub</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Верезуб Наталия Анатольевна — канд. физ.−мат. наук, старший научный сотрудник.</p><p>просп. Вернадского, д. 101, корп. 1, Москва, 119526.</p></bio><bio xml:lang="en"><p>Nataliya A. Verezub: Cand. Sci. (Phys.−Math.), Senior Researcher.</p><p>101−1 Prospekt Vernadskogo, Moscow 119526.</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>Простомолотов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Prostomolotov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Простомолотов Анатолий Иванович — доктор техн. наук, ведущий научный сотрудник.</p><p> </p></bio><bio xml:lang="en"><p> Anatoly I. Prostomolotov: Dr. Sci. (Eng.), Leading Researcher.</p><p>101−1 Prospekt Vernadskogo, Moscow 119526.</p></bio><email xlink:type="simple">prosto@ipmnet.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Табачкова</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Tabachkova</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Табачкова Наталия Юрьевна — канд. физ.−мат. наук, доцент.</p><p>Ленинский просп., д. 4, Москва, 119049.</p></bio><bio xml:lang="en"><p> Natalia Yu. Tabachkova: Cand. Sci. (Phys.−Math.), Associate Professor.</p><p>4 Leninsky Prospekt, Moscow 119049.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС».</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology MISiS.</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт проблем механики им. А. Ю. Ишлинского РАН.</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences.</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>21</day><month>05</month><year>2018</year></pub-date><volume>20</volume><issue>1</issue><fpage>22</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Богомолов Д.И., Бублик В.Т., Верезуб Н.А., Простомолотов А.И., Табачкова Н.Ю., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Богомолов Д.И., Бублик В.Т., Верезуб Н.А., Простомолотов А.И., Табачкова Н.Ю.</copyright-holder><copyright-holder xml:lang="en">Bogomolov D.I., Bublik V.T., Verezub N.A., Prostomolotov A.I., Tabachkova N.Y.</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://met.misis.ru/jour/article/view/242">https://met.misis.ru/jour/article/view/242</self-uri><abstract><p>Проведено экспериментально−теоретическое исследование процесса равноканального углового прессования (РКУП) для получения термоэлектрического (ТЭ) материала на основе теллурида висмута. Дан краткий обзор по математическому моделированию РКУП−процесса. Рассмотрено влияние конструктивных особенностей и температурных режимов РКУП на процесс пластического формования. Приведены результаты расчетов термонапряженного состояния образцов на разных стадиях РКУП−процесса. Расчеты для РКУП− процесса проведены с использованием лагранжевой сетки конечных элементов, которая в ходе процесса адаптивно подстраивалась под геометрию фильеры и измельчалась или укрупнялась в зависимости от значения пластической деформации для удовлетворения заданной точности расчета и сходимости итерационного процесса. Обсуждены результаты экспериментального изучения структуры и свойств полученных по РКУП образцов с помощью комплекса измерительных методов (рентгеновской дифрактометрии и электронной микроскопии). Термоэлектрические характеристики полученных материалов измерены методом Хармана. Проведены сравнительные методические расчеты процесса РКУП для ТЭ−материала на основе теллурида висмута при вариациях величин, определяющих образование зерен (критической пластической деформации в зависимости от температуры и степенной зависимости скорости этой деформации), позволившие настроить расчетную модель процесса РКУП по данным измерений размеров зерен для ТЭ−материала. Представлены результаты расчета процесса образования зерен при различных температурах пластического формования, которые сравниваются с экспериментальными данными. Практический результат, полученный в ходе работы, — улучшенная геометрия составной пресс−формы и отработанные технологические режимы пластической деформации, позволившие получить образцы с хорошими значениями ТЭ−эффективности.</p></abstract><trans-abstract xml:lang="en"><p>An experimental and theoretical study of the process of the equal−channel angular pressing (ECAP) was performed to obtain a thermoelectric (TE) material based on bismuth telluride. A brief review of the mathematical modeling of the ECAP process is given. The influence of the ECAP design features and temperature modes on the process of plastic forming is considered. The results of calculations of the thermally stressed state of samples at different stages of the ECAP process are presented. The calculations of the ECAP process were carried out by means of Lagrangian finite element mesh, which adjusted adaptively during the process to the die geometry and became finer or coarser depending on the magnitude of the plastic deformation. It was required for the specified calculation accuracy and the convergence of iterative process. The results of an experimental study of the structure and properties of samples obtained by the ECAP using a set of measuring methods (X−ray diffractometry and electron microscopy) are discussed. The thermoelectric characteristics of the obtained materials were measured by Harman method. Comparative methodical calculations of the ECAP process for TE materials based on bismuth telluride have been made by adjusting parameters determining the grain formation (i.e. the critical plastic deformation as a function of temperature and power−law dependence of its rates). It made possible to adjust the ECAP model on the basis of the measured grain sizes for TE materials . The calculation results of grain creation during the plastic forming, which are compared with the measurement data, are presented. The practical result of this research was the improved geometry of the die and the validated technological regimes of plastic deformation, which allowed obtaining samples with the good TE efficiency.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>математическое моделирование</kwd><kwd>РКУП</kwd><kwd>пластичность</kwd><kwd>теллурид висмута</kwd><kwd>термоэлектричество</kwd><kwd>рекристаллизация</kwd><kwd>зерно</kwd><kwd>микроскопия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mathematical modeling</kwd><kwd>ECAP</kwd><kwd>plasticity</kwd><kwd>bismuth telluride</kwd><kwd>thermoelectricity</kwd><kwd>recrystallization</kwd><kwd>grain</kwd><kwd>microscopy</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">Im J.−T. Grain refinement and texture development of cast BiSb alloy via severe plastic deformation. − Yeung University (S. Korea), 2007. − 113 p.</mixed-citation><mixed-citation xml:lang="en">Im J.−T. Grain refinement and texture development of cast BiSb alloy via severe plastic deformation. Yeung University (S. Korea), 2007. 113 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Zhu W., Yang J. Y., Gao X. H., Hou J., Bao S. Q., Fan X. A. The underpotential deposition of bismuth and tellurium on cold rolled silver substrate by ECALE // Electrochimica Acta. − 2005. − V. 50, iss. 27. − P. 5465—5472. DOI: 10.1016/j.electacta.2005.03.028</mixed-citation><mixed-citation xml:lang="en">Zhu W., Yang J. Y., Gao X. H., Hou J., Bao S. Q., Fan X. A. The underpotential deposition of bismuth and tellurium on cold rolled silver substrate by ECALE. Electrochimica Acta., 2005, vol. 50, no. 27, pp. 5465—5472. DOI: 10.1016/j.electacta.2005.03.028</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Ashida M., Hamachiyo T., Hasezaki K., Matsunoshita H., Horita Z. Effect of high pressure torsion on crystal orientation to improve the thermoelectric property of a Bi2Te3−based thermoelectric semiconductor // Adv. Mater. Res. − 2010. − V. 89–91. − P. 41—46. DOI: 10.4028/www.scientific.net/AMR.89-91.41</mixed-citation><mixed-citation xml:lang="en">Ashida M., Hamachiyo T., Hasezaki K., Matsunoshita H., Horita Z. Effect of high pressure torsion on crystal orientation to improve the thermoelectric property of a Bi2Te3−based thermoelectric semiconductor. Adv. Mater. Res., 2010, vol. 89–91, pp. 41—46. DOI: 10.4028/www.scientific.net/AMR.89−91.41</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Ceresara S., Codecasa M., Passaretti F., Tomeš F., Weidenkaff F., Fanciulli C. Thermoelectric properties of in situ formed Bi0.85Sb0.15/Bi−rich particles composite // J. Electronic Materials. − 2011. − V. 40, iss. 5. − P. 557—560. DOI: 10.1007/s11664-010-1450-7</mixed-citation><mixed-citation xml:lang="en">Ceresara S., Codecasa M., Passaretti F., Tomeš F., Weidenkaff F., Fanciulli C. Thermoelectric properties of in situ formed Bi0.85Sb0.15/Bi−rich particles composite. J. Electronic Materials. 2011, vol. 40, no. 5, pp. 557—560. DOI: 10.1007/s11664−010−1450−7</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Im J.−T., Hartwig K. T., Sharp J. Microstructural refinement of cast p−type Bi2Te3—Sb2Te3 by equal channel angular extrusion // Acta Materialia. − 2004. − V. 52, iss. 1. − P. 49—55. DOI: 10.1016/j.actamat.2003.08.025</mixed-citation><mixed-citation xml:lang="en">Im J.−T., Hartwig K. T., Sharp J. Microstructural refinement of cast p−type Bi2Te3—Sb2Te3 by equal channel angular extrusion. Acta Materialia, 2004, vol. 52, no. 1, pp. 49—55. DOI: 10.1016/j.actamat.2003.08.025</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Kim Hyoung Seop, Quang Pham, Seo Min Hong, Hong Sun Ig, Baik Kyeong Ho, Lee Hong Rho, Nghiep Do Minh. Process modelling of equal channel angular pressing for ultrafine grained materials // Materials Transactions. − 2004. − V. 45, N 7. − P. 2172— 2176. DOI: 10.2320/matertrans.45.2172</mixed-citation><mixed-citation xml:lang="en">Kim Hyoung Seop, Quang Pham, Seo Min Hong, Hong Sun Ig, Baik Kyeong Ho, Lee Hong Rho, Nghiep Do Minh. Process modelling of equal channel angular pressing for ultrafine grained materials. Materials Transactions, 2004, vol. 45, no. 7, pp. 2172—2176. DOI: 10.2320/matertrans.45.2172</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Maciejewski J., Kopeć H., Petryk H. Finite element analysis of strain non−uniformity in two processes of severe plastic deformation // Engineering Transactions. − 2007. − V. 55, N 3. − P. 197—216.</mixed-citation><mixed-citation xml:lang="en">Maciejewski J., Kopeć H., Petryk H. Finite element analysis of strain non−uniformity in two processes of severe plastic deformation. Engineering Transactions, 2007, vol. 55, no. 3, pp. 197—216.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Aour B., Mitsak A. Analysis of plastic deformation of semi− crystalline polymers during ECAE process using 135° die // J. Theoretical and Applied Mechanics. − 2016. − V. 54, N 1. − P. 263—275. DOI: 10.15632/jtam-pl.54.1.263</mixed-citation><mixed-citation xml:lang="en">Aour B., Mitsak A. Analysis of plastic deformation of semi−crystalline polymers during ECAE process using 135° die. J. Theoretical and Applied Mechanics, 2016, vol. 54, no. 1, pp. 263—275. DOI: 10.15632/jtam−pl.54.1.263</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Beyerlein I. J., Lebensohn R. A., Tomé C. N. Modeling texture and microstructural evolution in the equal channel angular extrusion process // Materials Science and Engineering A. − 2003. − V. 345, iss. 1–2. − P. 122—138. DOI: 10.1016/S0921-5093(02)00457-4</mixed-citation><mixed-citation xml:lang="en">Beyerlein I. J., Lebensohn R. A., Tomé C. N. Modeling texture and microstructural evolution in the equal channel angular extrusion process. Materials Science and Engineering A, 2003, vol. 345, no. 1–2, pp. 122—138. DOI: 10.1016/S0921−5093(02)00457−4</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Parshikov R. A., Rudskoy A. I., Zolotov A. M., Tolochko O. V. Technological problems of equal channel angular pressing // Rev. Adv. Mater. Sci. − 2013. − V. 34. − P. 26—36. URL: http://www.ipme.ru/e-journals/RAMS/no_13413/04_13413_tolochko.pdf</mixed-citation><mixed-citation xml:lang="en">Parshikov R. A., Rudskoy A. I., Zolotov A. M., Tolochko O. V. Technological problems of equal channel angular pressing. Rev. Adv. Mater. Sci., 2013, vol. 34, pp. 26—36. URL: http://www.ipme.ru/e−journals/RAMS/no_13413/04_13413_tolochko.pdf</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Luis C. J., Salcedo D., Luri R., León J., Puertas I. FEM modelling of the continuous combined drawing and rolling process for severe plastic deformation of metallic materials // In book: Numerical modeling of materials under extreme conditions. Advanced structured materials. V. 35. − Berlin; Heidelberg: Springer, 2014. − P. 17—45. DOI: 10.1007/978-3-642-54258-9_2</mixed-citation><mixed-citation xml:lang="en">Luis C. J., Salcedo D., Luri R., León J., Puertas I. FEM modelling of the continuous combined drawing and rolling process for severe plastic deformation of metallic materials. In book: Numerical modeling of materials under extreme conditions. Advanced structured materials. V. 35. Berlin; Heidelberg: Springer, 2014, pp. 17—45. DOI: 10.1007/978-3-642-54258-9_2</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Basavaraj P. 3D finite element simulation of equal channel angular pressing with different material models // International Journal of Emerging Technologies and Innovative Research. − 2016. − V. 3, iss. 3. − P. 16—28. URL: http://www.jetir.org/view?paper=JETIR1603005</mixed-citation><mixed-citation xml:lang="en">Basavaraj P. 3D finite element simulation of equal channel angular pressing with different material models. International Journal of Emerging Technologies and Innovative Research, 2016, vol. 3, no. 3, pp. 16—28. URL: http://www.jetir.org/view?paper=JETIR1603005</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Krállics G., Széles Z., Malgyn D. Finite element simulation of multi−pass equal channel angular pressing // Materials Science Forum. − 2003. − V. 414–415. − P. 439—444. DOI: 10.4028/www.scientific.net/MSF.414-415.439</mixed-citation><mixed-citation xml:lang="en">Krállics G., Széles Z., Malgyn D. Finite element simulation of multi−pass equal channel angular pressing. Materials Science Forum, 2003, vol. 414–415, pp. 439—444. DOI: 10.4028/www.scientific.net/MSF.414−415.439</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Богомолов Д. И. Структура и свойства низкотемпературных термоэлектрических материалов, полученных интенсивной пластической деформацией // Автореф. дис. … канд. техн. наук. − М.: МИСиС, 2013. − 23 с.</mixed-citation><mixed-citation xml:lang="en">Bogomolov D. I. Struktura i svoistva nizkotemperaturnykh termoelektricheskikh materialov, poluchennykh intensivnoi plasticheskoi deformatsiei [The structure and properties of low− temperature thermoelectric materials obtained by intense plastic deformation]. Avtoreferat dis. … kand. tekhn. nauk. Moscow: MISiS, 2013. 23 p. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Егер Дж. К. Упругость, прочность и текучесть. − М.: Машгиз, 1961. − 170 с.</mixed-citation><mixed-citation xml:lang="en">Eger J. K. Uprugost’, prochnost’ i tekuchest’ [Elasticity Strength and Fluidity]. Moscow: Mashgiz, 1961. 170 p. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Лаврентьев М. Г., Меженный М. В., Освенский В. Б., Простомолотов А. И. Математическое моделирование процесса экструзии термоэлектрического материала // Изв. вузов. Материалы электронной техники. − 2012. − № 3. − С. 35—40. DOI: 10.17073/1609-3577-2012-3-35-40</mixed-citation><mixed-citation xml:lang="en">Lavrent’ev M. G., Mezhenny M. V., Osvensky V .B., Prostomolotov A. I. Mathematical modeling of extrusion process of thermoelectric material. Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering, 2012, vol. 3, pp. 35—40. (In Russ.). DOI: 10.17073/1609-35772012-3-35-40</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">MSC.Marc Volume A: Theory and User Information. MSC. Software Corporation. 2008. 805 p. URL: https://simcompanion.mscsoftware.com/infocenter/index?page=content&amp;id=DOC9245</mixed-citation><mixed-citation xml:lang="en">MSC.Marc Volume A: Theory and User Information. MSC. Software Corporation. 2008. 805 p. URL: https://simcompanion.mscsoftware.com/infocenter/index?page=content&amp;id=DOC9245</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Mitsak A., Aour B., Khelil F. Numerical investigation of plastic deformation in two−turn equal channel angular extrusion // Engineering, Technology &amp; Applied Science Research. − 2014. − V. 4, N 6. − P. 728—733. URL: http://etasr.com/index.php/ETASR/article/view/517</mixed-citation><mixed-citation xml:lang="en">Mitsak A., Aour B., Khelil F. Numerical investigation of plastic deformation in two−turn equal channel angular extrusion. Engineering, Technology &amp; Applied Science Research, 2014, vol. 4, no. 6, pp. 728—733. URL: http://etasr.com/index.php/ETASR/article/view/517</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Li S., Bourke M. A. M., Beyerlein I. J., Alexander D. J., Clausen B. Finite element analysis of the plastic deformation zone and working load in equal channel angular extrusion // Materials Science and Engineering A. − 2004. − V. 382, iss. 1–2. − P. 217—236. DOI: 10.1016/j.msea.2004.04.067</mixed-citation><mixed-citation xml:lang="en">Li S., Bourke M. A. M., Beyerlein I. J., Alexander D. J., Clausen B. Finite element analysis of the plastic deformation zone and working load in equal channel angular extrusion. Materials Science and Engineering A, 2004, vol. 382, no. 1–2, pp. 217—236. DOI: 10.1016/j.msea.2004.04.067</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Bogomolov D. I., Bublik V. T., Tabachkova N. Yu., Tarasova I. V. Properties and formation of the structure of Bi2Se0.3Te2.7 solid solutions produced by equal−channel angular pressing // J. Electronic Materials. − 2016. − V. 45, N 1. − P. 403—410. DOI: 10.1007/s11664-015-4110-0</mixed-citation><mixed-citation xml:lang="en">Bogomolov D. I., Bublik V. T., Tabachkova N. Yu., Tarasova I. V. Properties and formation of the structure of Bi2Se0.3Te2.7 solid solutions produced by equal−channel angular pressing. J. Electronic Materials, 2016, vol. 45, no. 1, pp. 403—410. DOI: 10.1007/ s11664−015−4110−0</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Простомолотов А. И., Верезуб Н. А. Динамическое моделирование пластического формования термоэлектрического материала методом горячей экструзии // Вестник Тамбовского ГУ им. Г. Р. Державина. Cер. Естественные и технические науки. − 2016. − Т. 21, № 3. − С. 818—821. DOI: 10.20310/1810-0198-201621-3-818-821</mixed-citation><mixed-citation xml:lang="en">Prostomolotov A. I., Verezub N. A. Dynamic modeling of plastic formation of thermo−electrical material by hot extrusion. Tambov University Reports. Series: Natural and Technical Sciences, 2016, vol. 21, no. 3, pp. 818—821. (In Russ.). DOI: 10.20310/1810−0198−2016−21−3−818−821</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
