Effect of isothermal exposures on hardness evolution of high-strength metastable-β-titanium alloy VT47

Shiryaev A.A., Nochovnaya N.A., Pomelnikova A.S.
UDC
669.295
DOI
10.18577/2307-6046-2019-0-10-25-33
Article PDF (Russian) (736.36 KB)
How to cite
Shiryaev A.A., Nochovnaya N.A., Pomelnikova A.S. Effect of isothermal exposures on hardness evolution of high-strength metastable-β-titanium alloy VT47 // Proceedings of VIAM. 2019. No. 10. DOI: 10.18577/2307-6046-2019-0-10-25-33. URL: https://test.viam.ru/en/journal/2019/10/3
Keywords
metastable--titanium alloys, VT47, heat treatment, diagram, hardness, microstructure.
Abstract

Rockwell hardness (HRC) studies have been accomplished on samples cut from sheets of metastable-b-titanium alloy VT47 after isothermal exposures (ageing) upon a wide range of temperatures and exposure durations. A diagram and C-shaped alloy hardness curves have been plotted, and a comparative assessment of hardness values with a microstructure was carried out. It has been established that VT47 alloy is hardened significantly (≥40 HRC) by ageing in the temperature range of 400–500°С. The temperature range of 450–500°Сcan be considered to be the most rational from the standpoint of achievable hardness values and required ageing times.

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