| The effect of ultrasonic treatment (UST) on the microstructure and mechanical properties of bulk nanostructured nickel processed by equal-channel angular pressing (ECAP) is studied in the range of stress amplitudes between 0 and 100 MPa. It is shown that UST results in a considerable simultaneous increase of the ultimate strength and ductility of this material. There exists an optimal value of the amplitude of ultrasonic vibrations for which the effect is maximal. The results prove that UST can be an efficient method for an improvement of the mechanical properties of nanostructured materials alternative to annealing. |
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