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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

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.

Acknowledgements: 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

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