zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2026-92-3-57-70zldm-2761Research ArticleИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. МЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬTESTING OF STRUCTURE AND PARAMETERS. MECHANICAL TESTING METHODSПроблемы определения радиационного упрочнения сталей при ионном облучении с использованием инструментального индентированияThe problems for radiation hardening determination of the steels under ion irradiation using instrumental indentationМарголинБ. З.MargolinB. Z.

Борис Захарович Марголин

191015, г. Санкт-Петербург, Шпалерная ул., 49

Boris Z. Margolin

49, Shpalernaya ul., St. Petersburg, 191015

margolinbz@yandex.ruБеляеваЛ. А.BelyaevaL. A.

Любовь Афанасьевна Беляева

191015, г. Санкт-Петербург, Шпалерная ул., 49

Lyubov A. Belyaeva

49, Shpalernaya ul., St. Petersburg, 191015

СорокинА. А.SorokinA. A.

Александр Андреевич Сорокин

191015, г. Санкт-Петербург, Шпалерная ул., 49

Aleksander A. Sorokin

49, Shpalernaya ul., St. Petersburg, 191015

ГладкихЕ. В.GladkikhE. V.

Екатерина Владимировна Гладких

108840, Москва, г. Троицк, Центральная ул., 7а

Ekaterina V. Gladkikh

7a, Tsentralnaya ul., Troitsk, Moscow, 108840

НИЦ «Курчатовский институт» — ЦНИИ КМ «Прометей»РоссияNRC «Kurchatov Institute» — CRISM «Prometey»Russian FederationНИЦ «Курчатовский институт» — ТИСНУМРоссияNRC «Kurchatov Institute» — «TISNCM»Russian Federation2026260320269235770Copyright © Марголин Б.З., Беляева Л.А., Сорокин А.А., Гладких Е.В., 20262026Марголин Б.З., Беляева Л.А., Сорокин А.А., Гладких Е.В.Margolin B.Z., Belyaeva L.A., Sorokin A.A., Gladkikh E.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/2761

Рассмотрена возможность применения метода инструментального индентирования пирамидой Берковича для определения микротвердости и радиационного упрочнения сталей в результате ионного облучения. Выявлены основные трудности, возникающие при оценке микротвердости тонкого облученного слоя. В первую очередь они связаны с тем, что при определении микротвердости по диаграмме индентирования с использованием общепринятых формул Oliver и Pharr наблюдается ее зависимость от глубины индентирования даже для однородного материала. Отмечены недостатки комбинированного подхода оценки микротвердости — по диаграмме индентирования в сочетании с обработкой зависимости микротвердости от глубины индентирования с помощью диаграмм Nix и Gao. Предложен метод определения микротвердости, основанный на прямом измерении площади отпечатка индентора, позволяющий исключить влияние глубины индентирования на микротвердость для однородного материала. Показано, что для однородного материала микротвердость при индентировании как пирамидой Берковича, так и пирамидой Виккерса не зависит от глубины индентирования, если площадь отпечатка определяется непосредственно по измерению его геометрических характеристик. Предложенный метод позволяет получать адекватные оценки радиационного упрочнения тонкого слоя материала, облученного ионами. Метод апробирован при индентировании с постоянной скоростью деформации образцов аустенитной и ферритно-мартенситной стали.

The application of instrumental indentation method with the Berkovich pyramid for determination of the microhardness and radiation hardening of steels after ion irradiation is considered. The main difficulties arising in microhardness determination of a thin irradiated layer are identified. First of all, such difficulties arise when microhardness is determined with indentation diagram and the Oliver and Pharr formulae. For this case the dependence of microhardness on the indentation depth is observed even for homogeneous material. Disadvantages of microhardness determination are considered when the combine approach is used that includes processing indentation diagram with the Oliver and Pharr formulae and processing dependence of microhardness on indentation depth by the Nix and Gao diagram. A method for determining microhardness based on direct measurement of the indent projection area is proposed, which allows eliminating the influence of indentation depth on microhardness for a homogeneous material. It is shown that for a homogeneous material, the microhardness under indentation with both the Berkovich and Vickers pyramids does not depend on the indentation depth if the area of the indent projection is determined directly by measurement of its geometric characteristics. The method proposed in the work allows obtaining adequate estimates of radiation hardening of a thin layer of material irradiated by ions. The method has been verified by indentation at constant strain rate for two classes of steel: austenitic and ferritic-martensitic.

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