Phase composition and structure formation in VT5, VT20, and VT6 titanium alloys upon thermo-hydrogen treatment and plastic deformation

Nochovnaya N.A., Panin P.V.
Nochovnaya N.A., Panin P.V. Phase composition and structure formation in VT5, VT20, and VT6 titanium alloys upon thermo-hydrogen treatment and plastic deformation // Proceedings of VIAM. 2017. No. 9. DOI: 10.18577/2307-6046-2017-0-9-1-1. URL: https://test.viam.ru/en/journal/2017/9/1
Keywords
titanium alloys, thermo-hydrogen treatment, plastic deformation, phase composition, structure.
Abstract

A complex approach to structure and properties transformation of titanium alloys has been in focus, the approach including thermo-hydrogen treatment and plastic deformation combination. It has been shown that thermo-hydrogen treatment together with plastic deformation allow to obtain a multiphase structure in 2 mm sheet semi-finished products of VT5 (Ti–5,8Al), VT20 (Ti–6,2Al–1,2V–1Mo–2Zr), and VT6 (Ti–5,7Al–4,3V) titanium alloys (wt.%). The obtained structure contain α-phase in two structural constituents: primary αI-phase enriched by aluminum up to Ti3Al-based α2-phase, and secondary αdeg-phase depleted by aluminum.

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