blackmetИзвестия высших учебных заведений. Черная МеталлургияIzvestiya. Ferrous Metallurgy0368-07972410-2091National University of Science and Technology "MISIS"10.17073/0368-0797-2015-5-346-351blackmet-667Research ArticleМАТЕРИАЛОВЕДЕНИЕ И НАНОТЕХНОЛОГИИMATERIAL SCIENCE AND NANOTECHNOLOGIESСТРУКТУРНО-МАСШТАБНЫЕ УРОВНИ УВЕЛИЧЕНИЯ УСТАЛОСТНОЙ ДОЛГОВЕЧНОСТИ СТАЛЕЙ И СПЛАВОВ ЭЛЕКТРОННО-ПУЧКОВОЙ ОБРАБОТКОЙSTRUCTURAL-SCALE LEVELS OF FATIGUE DURABILITY INCREASE OF STEELS AND ALLOYS BY ELECTRON-BEAM TREATMENTГромовВ. Е.GromovV. E.

д.ф.-м.н., профессор, зав. кафедрой физики им. В.М. Финкеля

Dr. Sci. (Phys.-math.), Professor, Head of the Chair of physics named after V.M. Finkel

gromov@physics.sibsiu.ruВоробьевС. В.Vorob’evS. V.

к.т.н., соискатель ученой степени доктора наук кафедры физики им. В.М. Финкеля

Cand. Sci. (Eng.), Candidates for a degree of Dr. Sci. (Eng.) the Chair of physics named after V.M. Finkel

СизовВ. В.SizovV. V.

к.т.н., инженер кафедры физики им. В.М. Финкеля

Cand. Sci. (Eng.), Engineer of the Chair “Physics” named after V.M. Finkel

КоноваловС. В.KonovalovS. V.

д.т.н., доцент, профессор кафедры физики им. В.М. Финкеля

Dr. Sci. (Eng.), Assist. Professor, Professor of the Chair of physics named after V.M. Finkel

ИвановЮ. В.IvanovYu. F.

д.ф.-м.н., профессор, главный научный сотрудник

Dr. Sci. (Phys.-math.), Professor, Chief Research Associate

Сибирский государственный индустриальный университет 654007, Россия, Кемеровская обл., г. Новокузнецк, ул. Кирова, 42РоссияSiberian State Industrial University 42, Kirova str., Kemerovo region, Novokuznetsk, 654007, RussiaRussian FederationSiberian State Industrial University 42, Kirova str., Kemerovo region, Novokuznetsk, 654007, RussiaRussian FederationИнститут сильноточной электроники СО РАН 634055, Россия, г. Томск, пр. Академический, 2/3 Национальный исследовательский Томский государственный университет 634050, Россия, г. Томск, пр. Ленина, 50РоссияInstitute of High Current Electronics SB RAS 2/3, Akademicheskii ave., Tomsk, 634055, Russia National Research Tomsk State University 50, Lenina ave., Tomsk, 634050, RussiaRussian Federation201510062015585346351Copyright © Громов В.Е., Воробьев С.В., Сизов В.В., Коновалов С.В., Иванов Ю.В., 20152015Громов В.Е., Воробьев С.В., Сизов В.В., Коновалов С.В., Иванов Ю.В.Gromov V.E., Vorob’ev S.V., Sizov V.V., Konovalov S.V., Ivanov Y.F.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/667

Электронно-пучковая обработка (с параметрами: плотность энергии пучка электронов 10 – 40 Дж/см2, длительность импульса 50 – 150 мкс, число импульсов 3 – 5, частота следования 0,3 с–1 ) сталей различных структурных классов (08Х18Н10Т, 20Х23Н18, 20Х13, Э76Ф) и силумина приводит к увеличению числа циклов до разрушения примерно в 3,5 раза. Методами растровой и просвечивающей электронной дифракционной микроскопии проведены исследования структурно-фазовых состояний и дефектной субструктуры этих материалов. Увеличение усталостной долговечности стали обусловлено преобразованием структуры поверхностного слоя материала, происходящим при облучении образцов высокоинтенсивным импульсным электронным пучком. Высказано предположение, что физический смысл влияния многоуровневого структурно-фазового состояния на механические свойства поверхностного слоя материала состоит в перераспределении упругой энергии как за счет взаимодействия упругих полей структурных элементов различного масштабного уровня, так и за счет снижения масштабного уровня локализации пластической деформации.

The electron-beam treatment of different classes of steels (Fe–0.1C–18Cr–10Ni–1Ti, Fe–0.2C–23Cr–18Ni, Fe–0.2C–13Cr, Fe–0.76C–1V) and silumin (Al – 12 % Si) with the parameters: electronbeam energy density 10 – 40 J/cm2, pulse duration 50 – 150 μs, pulse number 3 – 5, frequency 0.3 Hz) leads to the increase of cycle numbers up to the fracture in ~ 3.5 times. The studies of structure-phase states and defect substructure of these materials were carried out using the methods of scanning and transmission electron diffraction microscopy. It was shown that the increase in fatigue life of steel is due to the transformation of the structure of the surface layer of the material occurring during irradiation of samples high-intensity pulsed electron beam. It was suggested that the physical sense of the impact of multi-level structure-phase state on the mechanical properties of the surface layer of the material is in the redistribution of elastic energy as due to the interaction of the elastic fields of structural elements of different scale levels, and by reducing the scale level of plastic strain localization.

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The authors declare that there are no conflicts of interest present.