The increase of impact strength of ultrafine grained nickel after ultrasonic treatment

A.A. Samigullina1, R.R. Mulyukov1, A.A. Nazarov1*, A.A. Mukhametgalina2§, Y.V. Tsarenko3, V.V. Rubanik3
1Institute for Metals Superplasticity Problems RAS, Khalturin St. 39, 450001 Ufa
2Bashkir State University, 32 Zaki Validi str., 450074 Ufa
3Institute of Technical Acoustics NAS of Belarus, Lyudnikova av. 13, 210023 Vitebsk
Abstract
Impact strength tests of nickel samples exposed to equal-channel angular pressing (ECAP) were carried out. The influence of annealing and ultrasonic treatment with stress amplitudes of 20, 50 and 100 MPa on the impact fracture of ultrafine grained nickel processed by ECAP was shown.
Received: 03 February 2014   Revised: 05 February 2014   Accepted: 11 February 2014
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