Abstract
A model of the relaxation of the nonequilibrium structure of grain boundaries in bulk nanomaterials, which are produced by deformation methods, under an ultrasonic wave effect is proposed. Changes in the microstructure and the mechanical properties of nanostructured nickel produced by torsion under quasi-hydrostatic pressure and equal-channel angular pressing are experimentally studied. It has been shown that, at some moderate values of the amplitude, the ultrasonic effect leads to a decrease in internal stresses, as well as an increase in the thermal stability of the structure and the ductility of the nanomaterials.
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Original Russian Text © A.A. Nazarov, A.A. Samigullina, R.R. Mulyukov, Yu.V. Tsarenko, V.V. Rubanik, 2014, published in Problemy Mashinostroeniya i Nadezhnosti Mashin, 2014, No. 2, pp. 77–84.
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Nazarov, A.A., Samigullina, A.A., Mulyukov, R.R. et al. Changes in the microstructure and mechanical properties of nanomaterials under an ultrasonic wave effect. J. Mach. Manuf. Reliab. 43, 153–159 (2014). https://doi.org/10.3103/S1052618814020113
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DOI: https://doi.org/10.3103/S1052618814020113