Open AccessThe influence of silicon on topographical parameters and mechanical properties of the Ti-Ni-Ta-Si surface alloy synthesized on the NiTi-substrates
Author(s) -
F.A. D’yachenko,
A. A. Atovullaeva,
E. V. Yakovlev,
Л. Л. Мейснер
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1989/1/012003
Subject(s) - materials science , surface roughness , alloy , metallurgy , indentation , nickel titanium , silicon , deformation (meteorology) , surface finish , yield (engineering) , composite material , shape memory alloy
This work comprises a study of the effect of silicon on the topographical parameters and mechanical properties of the Ti-Ni-Ta-Si surface alloy (SA) synthesized on the NiTi-substrates by the additive thin-film electron-beam method. It was found that the roughness of [Ti-Ni-Ta-Si]SA (~0.095 μm) has a lower value than in [Ti-Ni-Ta]SA (~0.195 μm). The values of the yield strength σ y in the surface layers of [Ti-Ni-Ta-Si]SA and [Ti-Ni-Ta]SA are characterized by a gradient decrease from ~4.2 GPa up to ~1.2 and ~1.7 GPa, respectively. During the indentation, evaluation of the deformation behavior (recovered elastic –ε elast , and superelastic – εin the surface layers of SE , residual plastic – ε elast deformation) showed, that in surface layers of [Ti-Ni-Ta-Si]SA and [Ti-Ni-Ta]SA due to an increase of ε elast , there was a decrease in ε SE up to ~35 and ~22%, respectively (for the NiTi-initial ε SE ≈ 38%).