Conclusions
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1.
The original grain size of two-phase titanium alloys VT6 and VT23 after high-speed heating, quenching, and aging has almost no effect on the ultimate breaking strength of these alloys, but it changes their ductility characteristics to a significant degree.
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2.
The dependence of mechanical properties for thermally strengthened alloys VT6 and VT23 on original β-grain size may be described by empirical equations which are the well-known Petch-Hall expression only under conditions of constancy for values of ductility characteristics (δ and ϕ).
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Physicotechnical Institute, Academy of Sciences of the Belorussian SSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 32–35, February, 1991.
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Gordienko, A.I., Dymovskii, A.S. & Kozina, I.Y. Correlation of grain-structure parameters with the properties of thermally strengthened titanium alloys VT6 and VT23. Met Sci Heat Treat 33, 137–141 (1991). https://doi.org/10.1007/BF00773891
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DOI: https://doi.org/10.1007/BF00773891