Technological plasticity, structure and phase composition of a pilot titanium ortho alloy with 13 wt. рct. aluminum

Alexeev E.B., Nochovnaya N.A., Panin P.V., Novak A.V.
UDC
669.295
DOI
10.18577/2307-6046-2015-0-12-8-8
Article PDF (Russian) (1.14 MB)
How to cite
Alexeev E.B., Nochovnaya N.A., Panin P.V., Novak A.V. Technological plasticity, structure and phase composition of a pilot titanium ortho alloy with 13 wt. рct. aluminum // Proceedings of VIAM. 2015. No. 12. DOI: 10.18577/2307-6046-2015-0-12-8-8. URL: https://test.viam.ru/en/journal/2015/12/8
Keywords
high-temperature titanium ortho alloy, isothermal deformation, acceptable limit of deformation amount, hot pressure treatment, phase transformations, phase composition, ordered phases, microstructure.
Abstract

The article presents research results on technological parameters of deformation, structure and phase composition of a pilot intermetallic ortho alloy Ti–13Al–40Nb–5(Zr+V+Mo+W)–0,5(Si+C) determination. It has been resolved that no strain strengthening effect throughout hot working process is observed at a temperature of 1000°С. Temperature intervals of the following phase areas have been determined for the pilot alloy: (О+βA2)→(О+β(A2+В2)+α2)→(β(A2+В2)+α2)→β(A2+В2). Also it has been shown that technological plasticity (degree of strain) decrease at deformation temperatures lower than 1000°С and prolonged duration is caused by phase transformations: in these conditions decomposition of β-phase takes place together with the ordered intermetallic O- and α2-phases precipitation.

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