Abstract
The characteristics of microstructure, deformation and fracture of Zr – 1 wt% Nb and Ti – 45 wt% Nb bioinert alloys in the coarse- and ultrafine-grained states are investigated. It is shown that the ultrafine-grained structure formed in them ensures excellent mechanical properties of the alloys and affects the stages of the stress-strain curves and the behavior of the maximum temperature vs. deformation time plot. The formation of an α-phase in the Ti – 45 wt% Nb ultrafine-grained alloy suppresses the linear stage VI characterized by a constant strain hardening coefficient. In stage VII, the strain hardening coefficient rapidly becomes negative, which indicates the material softening prior to its failure.
Original language | English |
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Pages (from-to) | 1718-1725 |
Number of pages | 8 |
Journal | Russian Physics Journal |
Volume | 61 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Jan 2019 |
Keywords
- fracture
- IR-imaging
- strain hardening coefficient
- stress-strain plots
- ultrafine-grained structure
- Zr – 1 wt% Nb and Ti – 45 wt% Nb alloys
ASJC Scopus subject areas
- Physics and Astronomy(all)