Correlation of grain-structure parameters with the properties of thermally strengthened titanium alloys VT6 and VT23

Abstract

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. 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).