T. P. Tolmachev , V. P. Pilyugin, A. M. Patselov, T. M. Gapontseva, A. V. Plotnikov, R. V. Churbaev, A. V. Inozemtsev
FEATURES OF THE STRAIN-INDUCED DISSOLUTION AND STRUCTURE OF FRACTURE SURFACES IN Cu-Co ALLOYS
DOI: 10.17804/2410-9908.2019.6.048-057 Cu–Co alloys containing various amounts of copper and cobalt have been synthesized by mechanical alloying at room temperature. The initial component ratio and the value of strain have an effect on the ultimate equilibrium solubility in the system, as well as on the fracture surfaces. The heterogeneity of fractures in the Cu-Co alloys is revealed after the fracture of the alloys with a predominant content of Co and Cu. An increase in strain leads to the formation of a uniformly distributed cleavage in a Cu-based alloy, as well as in the case of originally equiatomic alloys. In addition, the formation of a solid solution based on high-temperature modification of Co has been found.
Acknowledgement: The X-ray analysis was made in the laboratory of high-pressure physics, IMP UB RAS, Ekaterinburg. Electron microscopy was performed in the Nanotechnologies and Advanced Materials Testing Center, IMP UB RAS, Ekaterinburg.
The study was performed under a state assignment and supported by UB RAS, project No. 18-10-2-24. Keywords: mechanical alloying, severe plastic deformation, high-pressure torsion, X-ray diffraction analysis, scanning electron microscopy, supersaturated solid solution, immiscible Cu-Co system References:
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ОСОБЕННОСТИ ДЕФОРМАЦИОННОГО РАСТВОРЕНИЯ И СТРОЕНИЯ ПОВЕРХНОСТЕЙ РАЗРУШЕНИЯ СПЛАВОВ СИСТЕМЫ Cu-Co
Методом механосплавления синтезированы образцы сплавов системы Cu-Co с различным содержанием меди и кобальта. В зависимости от исходного соотношения компонентов и степени деформации установлен факт изменения предельной равновесной растворимости в данной системе, а также полиморфное превращение в фазу с гранецентрированной кубической кристаллической решеткой. Фазовый переход обусловлен деформационно-индуцированным растворением атомов меди в кобальтовой матрице. Деформационной растворимости кобальта соответствует характерный тип поверхности излома.
Благодарность: Работа выполнена при поддержке проекта УрО РАН (проект № 18-10-2-24) и в рамках государственного задания Ключевые слова: механическое сплавление, большие пластические деформации, кручение под высоким давлением, рентгеновская дифрактометрия, сканирующая электронная микроскопия, пересыщенный твердый раствор, система ограниченной растворимости Cu-Co Библиография:
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Библиографическая ссылка на статью
Features of the Strain-Induced Dissolution and Structure of Fracture Surfaces in Cu-Co Alloys / T. P. Tolmachev, V. P. Pilyugin, A. M. Patselov, T. M. Gapontseva, A. V. Plotnikov, R. V. Churbaev, A. V. Inozemtsev // Diagnostics, Resource and Mechanics of materials and structures. -
2019. - Iss. 6. - P. 48-57. - DOI: 10.17804/2410-9908.2019.6.048-057. -
URL: http://dream-journal.org/issues/2019-6/2019-6_271.html (accessed: 21.12.2024).
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