Abstract—
Deformation relief at different stages of work hardening of Cu–12 at % Al single crystals is studied by transmission electron microscopy. The relationship between the surface topography and the stages of strain hardening and substructural evolution is analyzed. It is confirmed that stage III of deformation hardening is determined by microtwinning. The surface-topography features associated with the development of microtwinning in the slip planes are found. It is shown that the deformation relief at stage IV of deformation contains short curved slip lines. The condition for the beginning of the microtwinning process is formulated. The dislocation density required for initiation of the microtwinning process is estimated, and the estimates show good agreement with the average dislocation density measured experimentally.
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This work was supported by the State Task of the Ministry of Science and Higher Education of the Russian Federation, project no. FEMN-2020-0004.
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Translated by O. Pismenov
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Solov’eva, Y.V., Solov’ev, A.N., Nikonenko, E.L. et al. Deformation Relief of Surface and Plastic Deformation Stages of Cu–12 at % Al Single Crystals. J. Surf. Investig. 16, 1291–1296 (2022). https://doi.org/10.1134/S1027451022060532
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DOI: https://doi.org/10.1134/S1027451022060532