The study of the quenching parameters influence on structure and hardness of orthorhombic titanium aluminide alloy VTI-4

Novak A.V., Alexeev E.B., Ivanov V.I., Dzunovich D.А.
UDC
669.017.165: 669.295
DOI
10.18577/2307-6046-2018-0-2-5-5
Article PDF (Russian) (939.94 KB)
How to cite
Novak A.V., Alexeev E.B., Ivanov V.I., Dzunovich D.А. The study of the quenching parameters influence on structure and hardness of orthorhombic titanium aluminide alloy VTI-4 // Proceedings of VIAM. 2018. No. 2. DOI: 10.18577/2307-6046-2018-0-2-5-5. URL: https://test.viam.ru/en/journal/2018/2/5
Keywords
Ti2AlNb, titanium aluminide, ortho-phase, VTI-4 alloy, heat treatment, microstructure, hardness, mechanical properties.
Abstract

The results of orthorhombic alloy VTI-4 research are given. To clarify the alloy position on the Ti–Al–Nb state diagram, it is suggested to perform a calculation of the β-stabilizing elements contribution relative to the niobium. The microstructure change was studied as a function of quenching temperatures corresponding to different phase regions. The dependence of the material hardness on the structure-phase state was studied. It was found that a decrease in the quenching temperature leads to an increase in the hardness values, which is due to the release of the ordered O-phase and a decrease in the volume fraction of the plastic β-phase.

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