Methods of electron microscopy and electron backscatter diffraction are used to investigate the influence of annealing and low deformations (up to 20%) on the structure and grain boundary misorientation spectrum of submicrocrystalline nickel. It is established that the relative fraction of high-angle grain boundaries in grainboundary ensemble of submicrocrystalline nickel increases in the process of annealing mainly due to the formation of annealing twins. A dependence of the evolution of the structure and spectrum of misorientation boundaries of nickel grains in the course of deformation on the deformation mechanism is demonstrated. Under conditions of creep, the development of grain boundary sliding promotes preservation of submicrocrystalline structure and increase in the relative fraction of high-angle grain boundaries in the grain boundary nickel ensemble.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 92–97, February, 2015.
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Grabovetskaya, G.P., Mishin, I.P. & Ratochka, I.V. Evolution of the Structure and Grain Boundary Misorientation Spectrum of Submicrocrystalline Nickel in the Process of Annealing and Deformation. Russ Phys J 58, 242–248 (2015). https://doi.org/10.1007/s11182-015-0488-7
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DOI: https://doi.org/10.1007/s11182-015-0488-7